/****************************************************************************
* SPLAT: An RF Signal Propagation Loss and Terrain Analysis Tool *
-* Last update: 31-Mar-2006 *
+* Last update: 21-Dec-2006 *
*****************************************************************************
* Project started in 1997 by John A. Magliacane, KD2BD *
*****************************************************************************
#define ARRAYSIZE 30025
#endif
-char string[255], sdf_path[255], opened=0, *splat_version={"1.1.1"};
+char string[255], sdf_path[255], opened=0, *splat_version={"1.2.0"};
double TWOPI=6.283185307179586, HALFPI=1.570796326794896,
PI=3.141592653589793, deg2rad=1.74532925199e-02,
EARTHRADIUS=20902230.97, METERS_PER_MILE=1609.344,
- METERS_PER_FOOT=0.3048, earthradius, max_range=0.0;
+ METERS_PER_FOOT=0.3048, KM_PER_MILE=1.609344, earthradius,
+ max_range=0.0;
int min_north=90, max_north=-90, min_west=360, max_west=-1,
max_elevation=-32768, min_elevation=32768, bzerror, maxdB=230;
-struct site { double lat;
- double lon;
- double alt;
- char name[50];
- } site;
-
-struct path { float lat[ARRAYSIZE];
- float lon[ARRAYSIZE];
- float elevation[ARRAYSIZE];
- float distance[ARRAYSIZE];
- int length;
- } path;
-
-struct dem { int min_north;
- int max_north;
- int min_west;
- int max_west;
- int max_el;
- int min_el;
- short data[1200][1200];
- unsigned char mask[1200][1200];
- } dem[MAXSLOTS];
-
-struct LR { double eps_dielect;
- double sgm_conductivity;
- double eno_ns_surfref;
- double frq_mhz;
- double conf;
- double rel;
- int radio_climate;
- int pol;
- } LR;
+unsigned char got_elevation_pattern=0, got_azimuth_pattern=0, metric=0;
+
+struct site { double lat;
+ double lon;
+ float alt;
+ char name[50];
+ } site;
+
+struct path { double lat[ARRAYSIZE];
+ double lon[ARRAYSIZE];
+ double elevation[ARRAYSIZE];
+ double distance[ARRAYSIZE];
+ int length;
+ } path;
+
+struct dem { int min_north;
+ int max_north;
+ int min_west;
+ int max_west;
+ int max_el;
+ int min_el;
+ short data[1200][1200];
+ unsigned char mask[1200][1200];
+ } dem[MAXSLOTS];
+
+struct LR { double eps_dielect;
+ double sgm_conductivity;
+ double eno_ns_surfref;
+ double frq_mhz;
+ double conf;
+ double rel;
+ int radio_climate;
+ int pol;
+ float antenna_pattern[361][1001];
+ } LR;
double elev_l[ARRAYSIZE+10];
{
/* Converts decimal degrees to degrees, minutes, seconds,
(DMS) and returns the result as a character string. */
-
- int degrees, minutes, seconds;
- double a, b, c, d;
+
+ char sign;
+ int degrees, minutes, seconds;
+ double a, b, c, d;
if (decimal<0.0)
+ {
decimal=-decimal;
+ sign=-1;
+ }
+
+ else
+ sign=1;
a=floor(decimal);
b=60.0*(decimal-a);
seconds=59;
string[0]=0;
- sprintf(string,"%d%c %d\' %d\"", degrees, 176, minutes, seconds);
+ sprintf(string,"%d%c %d\' %d\"", degrees*sign, 176, minutes, seconds);
return (string);
}
the mask based on the latitude and longitude of the area
pointed to. */
- int x, y, indx, minlat, minlon;
- char found;
+ int x, y, indx, minlat, minlon;
+ char found;
minlat=(int)floor(lat);
minlon=(int)floor(lon);
represented by the digital elevation model data in memory.
Function returns -5000.0 for locations not found in memory. */
- char found;
- int x, y, indx, minlat, minlon;
- double elevation;
+ char found;
+ int x, y, indx, minlat, minlon;
+ double elevation;
elevation=-5000.0;
return elevation;
}
+int AddElevation(double lat, double lon, double height)
+{
+ /* This function adds a user-defined terrain feature
+ (in meters AGL) to the digital elevation model data
+ in memory. Does nothing and returns 0 for locations
+ not found in memory. */
+
+ char found;
+ int x, y, indx, minlat, minlon;
+
+ minlat=(int)floor(lat);
+ minlon=(int)floor(lon);
+
+ x=(int)(1199.0*(lat-floor(lat)));
+ y=(int)(1199.0*(lon-floor(lon)));
+
+ for (indx=0, found=0; indx<MAXSLOTS && found==0; indx++)
+ {
+ if (minlat==dem[indx].min_north && minlon==dem[indx].min_west)
+ {
+
+ dem[indx].data[x][y]+=(short)rint(height);
+ found=1;
+ }
+ }
+
+ return found;
+}
+
double Distance(struct site site1, struct site site2)
{
/* This function returns the great circle distance
in miles between any two site locations. */
- double lat1, lon1, lat2, lon2, distance;
+ double lat1, lon1, lat2, lon2, distance;
lat1=site1.lat*deg2rad;
lon1=site1.lon*deg2rad;
/* This function returns the azimuth (in degrees) to the
destination as seen from the location of the source. */
- double dest_lat, dest_lon, src_lat, src_lon,
- beta, azimuth, diff, num, den, fraction;
+ double dest_lat, dest_lon, src_lat, src_lon,
+ beta, azimuth, diff, num, den, fraction;
dest_lat=destination.lat*deg2rad;
dest_lon=destination.lon*deg2rad;
return (azimuth/deg2rad);
}
-double ElevationAngle(struct site local, struct site remote)
+double ElevationAngle(struct site source, struct site destination)
{
/* This function returns the angle of elevation (in degrees)
- of the remote location as seen from the local site.
+ of the destination as seen from the source location.
A positive result represents an angle of elevation (uptilt),
while a negative result represents an angle of depression
(downtilt), as referenced to a normal to the center of
register double a, b, dx;
- a=GetElevation(remote)+remote.alt+earthradius;
- b=GetElevation(local)+local.alt+earthradius;
+ a=GetElevation(destination)+destination.alt+earthradius;
+ b=GetElevation(source)+source.alt+earthradius;
- dx=5280.0*Distance(local,remote);
+ dx=5280.0*Distance(source,destination);
/* Apply the Law of Cosines */
void ReadPath(struct site source, struct site destination)
{
/* This function generates a sequence of latitude and
- longitude positions between a source location and
- a destination along a great circle path, and stores
- elevation and distance information for points along
- that path in the "path" structure for later use. */
+ longitude positions between source and destination
+ locations along a great circle path, and stores
+ elevation and distance information for points
+ along that path in the "path" structure. */
- int c;
- double azimuth, distance, lat1, lon1, beta,
- den, num, lat2, lon2, total_distance;
- struct site tempsite;
+ int c;
+ double azimuth, distance, lat1, lon1, beta, den, num,
+ lat2, lon2, total_distance, x, y, path_length,
+ increment;
+ struct site tempsite;
lat1=source.lat*deg2rad;
lon1=source.lon*deg2rad;
+
+ lat2=destination.lat*deg2rad;
+ lon2=destination.lon*deg2rad;
+
azimuth=Azimuth(source,destination)*deg2rad;
+
total_distance=Distance(source,destination);
- for (distance=0, c=0; distance<=total_distance; distance+=0.04)
+ x=68755.0*acos(cos(lon1-lon2)); /* 1200 samples per degree */
+ y=68755.0*acos(cos(lat1-lat2)); /* 68755 samples per radian */
+
+ path_length=sqrt((x*x)+(y*y)); /* Total number of samples */
+
+ increment=total_distance/path_length; /* Miles per sample */
+
+ for (distance=0, c=0; distance<=total_distance; distance+=increment)
{
beta=distance/3959.0;
lat2=asin(sin(lat1)*cos(beta)+cos(azimuth)*sin(beta)*cos(lat1));
path.length=ARRAYSIZE-1;
}
+double ElevationAngle2(struct site source, struct site destination, double er)
+{
+ /* This function returns the angle of elevation (in degrees)
+ of the destination as seen from the source location, UNLESS
+ the path between the sites is obstructed, in which case, the
+ elevation angle to the first obstruction is returned instead.
+ "er" represents the earth radius. */
+
+ int x;
+ char block=0;
+ double source_alt, destination_alt, cos_xmtr_angle,
+ cos_test_angle, test_alt, elevation, distance,
+ source_alt2, first_obstruction_angle=0.0;
+ struct path temp;
+
+ temp=path;
+
+ ReadPath(source,destination);
+
+ distance=5280.0*Distance(source,destination);
+ source_alt=er+source.alt+GetElevation(source);
+ destination_alt=er+destination.alt+GetElevation(destination);
+ source_alt2=source_alt*source_alt;
+
+ /* Calculate the cosine of the elevation angle of the
+ destination (receiver) as seen by the source (transmitter). */
+
+ cos_xmtr_angle=((source_alt2)+(distance*distance)-(destination_alt*destination_alt))/(2.0*source_alt*distance);
+
+ /* Test all points in between source and destination locations to
+ see if the angle to a topographic feature generates a higher
+ elevation angle than that produced by the destination. Begin
+ at the source since we're interested in identifying the FIRST
+ obstruction along the path between source and destination. */
+
+ for (x=2, block=0; x<path.length && block==0; x++)
+ {
+ distance=5280.0*path.distance[x];
+
+ test_alt=earthradius+path.elevation[x];
+
+ cos_test_angle=((source_alt2)+(distance*distance)-(test_alt*test_alt))/(2.0*source_alt*distance);
+
+ /* Compare these two angles to determine if
+ an obstruction exists. Since we're comparing
+ the cosines of these angles rather than
+ the angles themselves, the sense of the
+ following "if" statement is reversed from
+ what it would be if the angles themselves
+ were compared. */
+
+ if (cos_xmtr_angle>cos_test_angle)
+ {
+ block=1;
+ first_obstruction_angle=((acos(cos_test_angle))/deg2rad)-90.0;
+ }
+ }
+
+ if (block)
+ elevation=first_obstruction_angle;
+
+ else
+ elevation=((acos(cos_xmtr_angle))/deg2rad)-90.0;
+
+ path=temp;
+
+ return elevation;
+}
+
double AverageTerrain(struct site source, double azimuthx, double start_distance, double end_distance)
{
/* This function returns the average terrain calculated in
memory to complete the survey (critical error), then
-9999.0 is returned. */
- int c, samples, endpoint;
- double beta, lat1, lon1, lat2, lon2, num, den, azimuth, terrain=0.0;
- struct site destination;
+ int c, samples, endpoint;
+ double beta, lat1, lon1, lat2, lon2, num, den, azimuth, terrain=0.0;
+ struct site destination;
lat1=source.lat*deg2rad;
lon1=source.lon*deg2rad;
error occurs, such as a lack of SDF data to complete the
survey, -5000.0 is returned. */
- int azi, c;
- char error=0;
- double terrain, avg_terrain, haat, sum=0.0;
+ int azi, c;
+ char error=0;
+ double terrain, avg_terrain, haat, sum=0.0;
/* Calculate the average terrain between 2 and 10 miles
from the antenna site at azimuths of 0, 45, 90, 135,
lat=location.lat;
lon=location.lon;
-
if (lat<xmax && lat>xmin && (LonDiff(lon,ymax)<0.0) && (LonDiff(lon,ymin)>0.0))
{
p1=1.0/1200.0;
embedded within the numbers expressed in the
input string. Decimal seconds are permitted. */
- double seconds, bearing=0.0;
- char string[20];
- int a, b, length, degrees, minutes;
+ double seconds, bearing=0.0;
+ char string[20];
+ int a, b, length, degrees, minutes;
/* Copy "input" to "string", and ignore any extra
spaces that might be present in the process. */
for (a=0, b=0; a<length && a<18; a++)
{
- if ((input[a]!=32 && input[a]!='\n') || (input[a]==32 && input[a+1]!=32 && b!=0))
+ if ((input[a]!=32 && input[a]!='\n') || (input[a]==32 && input[a+1]!=32 && input[a+1]!='\n' && b!=0))
{
string[b]=input[a];
b++;
if (b==2) /* Degree, Minute, Second Format (40 08 23) */
{
sscanf(string,"%d %d %lf",°rees, &minutes, &seconds);
- bearing=(double)degrees+((double)minutes/60)+(seconds/3600);
+
+ bearing=(double)abs(degrees)+((double)abs(minutes)/60)+(fabs(seconds)/3600);
+
+ if ((degrees<0) || (minutes<0) || (seconds<0.0))
+ bearing=-bearing;
}
/* Anything else returns a 0.0 */
or 'm', or by the word "meters" or "Meters", in which
case meters is assumed, and is handled accordingly. */
- int x;
- char string[50], qthfile[255];
- struct site tempsite;
- FILE *fd=NULL;
+ int x;
+ char string[50], qthfile[255];
+ struct site tempsite;
+ FILE *fd=NULL;
for (x=0; filename[x]!='.' && filename[x]!=0 && x<250; x++)
qthfile[x]=filename[x];
if (string[x]=='M' || string[x]=='m')
{
string[x]=0;
- sscanf(string,"%lf",&tempsite.alt);
+ sscanf(string,"%f",&tempsite.alt);
tempsite.alt*=3.28084;
}
else
{
string[x]=0;
- sscanf(string,"%lf",&tempsite.alt);
+ sscanf(string,"%f",&tempsite.alt);
}
}
return tempsite;
}
+void LoadPAT(char *filename)
+{
+ /* This function reads and processes antenna pattern (.az
+ and .el) files that correspond in name to previously
+ loaded SPLAT! .lrp files. */
+
+ int a, b, w, x, y, z, last_index, next_index, span;
+ char string[255], azfile[255], elfile[255], *pointer=NULL;
+ float az, xx, elevation, amplitude, rotation, valid1, valid2,
+ delta, azimuth[361], azimuth_pattern[361], el_pattern[10001],
+ elevation_pattern[361][1001], slant_angle[361], tilt,
+ mechanical_tilt, tilt_azimuth, tilt_increment, sum;
+ FILE *fd=NULL;
+ unsigned char read_count[10001];
+
+ for (x=0; filename[x]!='.' && filename[x]!=0 && x<250; x++)
+ {
+ azfile[x]=filename[x];
+ elfile[x]=filename[x];
+ }
+
+ azfile[x]='.';
+ azfile[x+1]='a';
+ azfile[x+2]='z';
+ azfile[x+3]=0;
+
+ elfile[x]='.';
+ elfile[x+1]='e';
+ elfile[x+2]='l';
+ elfile[x+3]=0;
+
+ rotation=0.0;
+
+ /* Load .az antenna pattern file */
+
+ fd=fopen(azfile,"r");
+
+ if (fd!=NULL)
+ {
+ /* Clear azimuth pattern array */
+
+ for (x=0; x<=360; x++)
+ {
+ azimuth[x]=0.0;
+ read_count[x]=0;
+ }
+
+
+ /* Read azimuth pattern rotation
+ in degrees measured clockwise
+ from true North. */
+
+ fgets(string,254,fd);
+ pointer=strchr(string,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%f",&rotation);
+
+
+ /* Read azimuth (degrees) and corresponding
+ normalized field radiation pattern amplitude
+ (0.0 to 1.0) until EOF is reached. */
+
+ fgets(string,254,fd);
+ pointer=strchr(string,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%f %f",&az, &litude);
+
+ do
+ {
+ x=(int)rintf(az);
+
+ if (x>=0 && x<=360 && fd!=NULL)
+ {
+ azimuth[x]+=amplitude;
+ read_count[x]++;
+ }
+
+ fgets(string,254,fd);
+ pointer=strchr(string,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%f %f",&az, &litude);
+
+ } while (feof(fd)==0);
+
+ fclose(fd);
+
+
+ /* Handle 0=360 degree ambiguity */
+
+ if ((read_count[0]==0) && (read_count[360]!=0))
+ {
+ read_count[0]=read_count[360];
+ azimuth[0]=azimuth[360];
+ }
+
+ if ((read_count[0]!=0) && (read_count[360]==0))
+ {
+ read_count[360]=read_count[0];
+ azimuth[360]=azimuth[0];
+ }
+
+ /* Average pattern values in case more than
+ one was read for each degree of azimuth. */
+
+ for (x=0; x<=360; x++)
+ {
+ if (read_count[x]>1)
+ azimuth[x]/=(float)read_count[x];
+ }
+
+ /* Interpolate missing azimuths
+ to completely fill the array */
+
+ last_index=-1;
+ next_index=-1;
+
+ for (x=0; x<=360; x++)
+ {
+ if (read_count[x]!=0)
+ {
+ if (last_index==-1)
+ last_index=x;
+ else
+ next_index=x;
+ }
+
+ if (last_index!=-1 && next_index!=-1)
+ {
+ valid1=azimuth[last_index];
+ valid2=azimuth[next_index];
+
+ span=next_index-last_index;
+ delta=(valid2-valid1)/(float)span;
+
+ for (y=last_index+1; y<next_index; y++)
+ azimuth[y]=azimuth[y-1]+delta;
+
+ last_index=y;
+ next_index=-1;
+ }
+ }
+
+ /* Perform azimuth pattern rotation
+ and load azimuth_pattern[361] with
+ azimuth pattern data in its final form. */
+
+ for (x=0; x<360; x++)
+ {
+ y=x+(int)rintf(rotation);
+
+ if (y>=360)
+ y-=360;
+
+ azimuth_pattern[y]=azimuth[x];
+ }
+
+ azimuth_pattern[360]=azimuth_pattern[0];
+
+ got_azimuth_pattern=255;
+ }
+
+ /* Read and process .el file */
+
+ fd=fopen(elfile,"r");
+
+ if (fd!=NULL)
+ {
+ for (x=0; x<=10000; x++)
+ {
+ el_pattern[x]=0.0;
+ read_count[x]=0;
+ }
+
+ /* Read mechanical tilt (degrees) and
+ tilt azimuth in degrees measured
+ clockwise from true North. */
+
+ fgets(string,254,fd);
+ pointer=strchr(string,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%f %f",&mechanical_tilt, &tilt_azimuth);
+
+ /* Read elevation (degrees) and corresponding
+ normalized field radiation pattern amplitude
+ (0.0 to 1.0) until EOF is reached. */
+
+ fgets(string,254,fd);
+ pointer=strchr(string,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%f %f", &elevation, &litude);
+
+ while (feof(fd)==0)
+ {
+ /* Read in normalized radiated field values
+ for every 0.01 degrees of elevation between
+ -10.0 and +90.0 degrees */
+
+ x=(int)rintf(100.0*(elevation+10.0));
+
+ if (x>=0 && x<=10000)
+ {
+ el_pattern[x]+=amplitude;
+ read_count[x]++;
+ }
+
+ fgets(string,254,fd);
+ pointer=strchr(string,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%f %f", &elevation, &litude);
+ }
+
+ fclose(fd);
+
+ /* Average the field values in case more than
+ one was read for each 0.01 degrees of elevation. */
+
+ for (x=0; x<=10000; x++)
+ {
+ if (read_count[x]>1)
+ el_pattern[x]/=(float)read_count[x];
+ }
+
+ /* Interpolate between missing elevations (if
+ any) to completely fill the array and provide
+ radiated field values for every 0.01 degrees of
+ elevation. */
+
+ last_index=-1;
+ next_index=-1;
+
+ for (x=0; x<=10000; x++)
+ {
+ if (read_count[x]!=0)
+ {
+ if (last_index==-1)
+ last_index=x;
+ else
+ next_index=x;
+ }
+
+ if (last_index!=-1 && next_index!=-1)
+ {
+ valid1=el_pattern[last_index];
+ valid2=el_pattern[next_index];
+
+ span=next_index-last_index;
+ delta=(valid2-valid1)/(float)span;
+
+ for (y=last_index+1; y<next_index; y++)
+ el_pattern[y]=el_pattern[y-1]+delta;
+
+ last_index=y;
+ next_index=-1;
+ }
+ }
+
+ /* Fill slant_angle[] array with offset angles based
+ on the antenna's mechanical beam tilt (if any)
+ and tilt direction (azimuth). */
+
+ if (mechanical_tilt==0.0)
+ {
+ for (x=0; x<=360; x++)
+ slant_angle[x]=0.0;
+ }
+
+ else
+ {
+ tilt_increment=mechanical_tilt/90.0;
+
+ for (x=0; x<=360; x++)
+ {
+ xx=(float)x;
+ y=(int)rintf(tilt_azimuth+xx);
+
+ while (y>=360)
+ y-=360;
+
+ while (y<0)
+ y+=360;
+
+ if (x<=180)
+ slant_angle[y]=-(tilt_increment*(90.0-xx));
+
+ if (x>180)
+ slant_angle[y]=-(tilt_increment*(xx-270.0));
+ }
+ }
+
+ slant_angle[360]=slant_angle[0]; /* 360 degree wrap-around */
+
+ for (w=0; w<=360; w++)
+ {
+ tilt=slant_angle[w];
+
+ /** Convert tilt angle to
+ an array index offset **/
+
+ y=(int)rintf(100.0*tilt);
+
+ /* Copy shifted el_pattern[10001] field
+ values into elevation_pattern[361][1001]
+ at the corresponding azimuth, downsampling
+ (averaging) along the way in chunks of 10. */
+
+ for (x=y, z=0; z<=1000; x+=10, z++)
+ {
+ for (sum=0.0, a=0; a<10; a++)
+ {
+ b=a+x;
+
+ if (b>=0 && b<=10000)
+ sum+=el_pattern[b];
+ if (b<0)
+ sum+=el_pattern[0];
+ if (b>10000)
+ sum+=el_pattern[10000];
+ }
+
+ elevation_pattern[w][z]=sum/10.0;
+ }
+ }
+
+ got_elevation_pattern=255;
+ }
+
+ for (x=0; x<=360; x++)
+ {
+ for (y=0; y<=1000; y++)
+ {
+ if (got_elevation_pattern)
+ elevation=elevation_pattern[x][y];
+ else
+ elevation=1.0;
+
+ if (got_azimuth_pattern)
+ az=azimuth_pattern[x];
+ else
+ az=1.0;
+
+ LR.antenna_pattern[x][y]=az*elevation;
+ }
+ }
+}
+
int LoadSDF_SDF(char *name)
{
/* This function reads uncompressed SPLAT Data Files (.sdf)
quadrangle limits are stored in the first available
dem[] structure. */
- int x, y, data, indx, minlat, minlon, maxlat, maxlon;
- char found, free_slot=0, line[20], sdf_file[255], path_plus_name[255];
- FILE *fd;
+ int x, y, data, indx, minlat, minlon, maxlat, maxlon;
+ char found, free_slot=0, line[20], sdf_file[255],
+ path_plus_name[255];
+ FILE *fd;
for (x=0; name[x]!='.' && name[x]!=0 && x<250; x++)
sdf_file[x]=name[x];
maximum and minimum elevations, and quadrangle limits are
stored in the first available dem[] structure. */
- int x, y, data, indx, minlat, minlon, maxlat, maxlon;
- char found, free_slot=0, sdf_file[255], path_plus_name[255];
- FILE *fd;
- BZFILE *bzfd;
+ int x, y, data, indx, minlat, minlon, maxlat, maxlon;
+ char found, free_slot=0, sdf_file[255], path_plus_name[255];
+ FILE *fd;
+ BZFILE *bzfd;
for (x=0; name[x]!='.' && name[x]!=0 && x<247; x++)
sdf_file[x]=name[x];
fflush(stdout);
return 1;
}
+
else
return -1;
}
+
else
return 0;
}
exists for the region requested, and that the region
requested must be entirely over water. */
- int x, y, indx, minlat, minlon, maxlat, maxlon;
- char found, free_slot=0;
- int return_value=-1;
+ int x, y, indx, minlat, minlon, maxlat, maxlon;
+ char found, free_slot=0;
+ int return_value=-1;
/* Try to load an uncompressed SDF first. */
the locations and names of the cities and site locations
read on topographic maps generated by SPLAT! */
- int x, y, z;
- char input[80], str[3][80];
- struct site city_site;
- FILE *fd=NULL;
+ int x, y, z;
+ char input[80], str[3][80];
+ struct site city_site;
+ FILE *fd=NULL;
fd=fopen(filename,"r");
fprintf(stdout,"Done!\n");
fflush(stdout);
}
+
else
fprintf(stderr,"*** ERROR: \"%s\": not found!\n",filename);
}
-void LoadBoundaries(char *filename)
+void LoadUDT(char *filename)
{
- /* This function reads Cartographic Boundary Files available from
- the U.S. Census Bureau, and plots the data contained in those
- files on the PPM Map generated by SPLAT!. Such files contain
- the coordinates that describe the boundaries of cities,
- counties, and states. */
-
- int x;
- double lat0, lon0, lat1, lon1;
- char string[80];
- struct site source, destination;
- FILE *fd=NULL;
+ /* This function reads a file containing User-Defined Terrain
+ features for their addition to the digital elevation model
+ data used by SPLAT!. Elevations in the UDT file are evaluated
+ and then copied into a temporary file under /tmp. Then the
+ contents of the temp file are scanned, and if found to be unique,
+ are added to the ground elevations described by the digital
+ elevation data already loaded into memory. */
+
+ int i, x, y, z, fd=0;
+ char input[80], str[3][80], tempname[15], *pointer=NULL;
+ double latitude, longitude, height, templat, templon,
+ tempheight, one_pixel;
+ FILE *fd1=NULL, *fd2=NULL;
+
+ strcpy(tempname,"/tmp/XXXXXX\0");
+ one_pixel=1.0/1200.0;
- fd=fopen(filename,"r");
+ fd1=fopen(filename,"r");
- if (fd!=NULL)
+ if (fd1!=NULL)
{
- fgets(string,78,fd);
+ fd=mkstemp(tempname);
+ fd2=fopen(tempname,"w");
+
+ fgets(input,78,fd1);
+
+ pointer=strchr(input,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
fprintf(stdout,"Reading \"%s\"... ",filename);
fflush(stdout);
- do
+ while (feof(fd1)==0)
{
- fgets(string,78,fd);
- sscanf(string,"%lf %lf", &lon0, &lat0);
- fgets(string,78,fd);
+ /* Parse line for latitude, longitude, height */
- do
+ for (x=0, y=0, z=0; x<78 && input[x]!=0 && z<3; x++)
{
- sscanf(string,"%lf %lf", &lon1, &lat1);
-
- lon0=fabs(lon0);
- lon1=fabs(lon1);
+ if (input[x]!=',' && y<78)
+ {
+ str[z][y]=input[x];
+ y++;
+ }
+
+ else
+ {
+ str[z][y]=0;
+ z++;
+ y=0;
+ }
+ }
+
+ latitude=ReadBearing(str[0]);
+ longitude=ReadBearing(str[1]);
+
+ /* Remove <CR> and/or <LF> from antenna height string */
+
+ for (i=0; str[2][i]!=13 && str[2][i]!=10 && str[2][i]!=0; i++);
+
+ str[2][i]=0;
+
+ /* The terrain feature may be expressed in either
+ feet or meters. If the letter 'M' or 'm' is
+ discovered in the string, then this is an
+ indication that the value given is expressed
+ in meters. Otherwise the height is interpreted
+ as being expressed in feet. */
+
+ for (i=0; str[2][i]!='M' && str[2][i]!='m' && str[2][i]!=0 && i<48; i++);
+
+ if (str[2][i]=='M' || str[2][i]=='m')
+ {
+ str[2][i]=0;
+ height=rint(atof(str[2]));
+ }
+
+ else
+ {
+ str[2][i]=0;
+ height=rint(3.28084*atof(str[2]));
+ }
+
+ if (height>0.0)
+ fprintf(fd2,"%f, %f, %f\n",latitude, longitude, height);
+
+ fgets(input,78,fd1);
+
+ pointer=strchr(input,';');
+
+ if (pointer!=NULL)
+ *pointer=0;
+ }
+
+ fclose(fd1);
+ fclose(fd2);
+ close(fd);
+
+ fprintf(stdout,"Done!\n");
+ fflush(stdout);
+
+ fd1=fopen(tempname,"r");
+ fd2=fopen(tempname,"r");
+
+ fscanf(fd1,"%lf, %lf, %lf", &latitude, &longitude, &height);
+
+ for (y=0; feof(fd1)==0; y++)
+ {
+ rewind(fd2);
+
+ fscanf(fd2,"%lf, %lf, %lf", &templat, &templon, &tempheight);
+
+ for (x=0, z=0; feof(fd2)==0; x++)
+ {
+ if (x>y)
+ if (fabs(latitude-templat)<=one_pixel && fabs(longitude-templon)<=one_pixel)
+ z=1;
+
+ fscanf(fd2,"%lf, %lf, %lf", &templat, &templon, &tempheight);
+ }
+
+ if (z==0)
+ AddElevation(latitude, longitude, height);
+
+ fscanf(fd1,"%lf, %lf, %lf", &latitude, &longitude, &height);
+ }
+
+ fclose(fd1);
+ fclose(fd2);
+ unlink(tempname);
+ }
+
+ else
+ fprintf(stderr,"*** ERROR: \"%s\": not found!\n",filename);
+}
+
+void LoadBoundaries(char *filename)
+{
+ /* This function reads Cartographic Boundary Files available from
+ the U.S. Census Bureau, and plots the data contained in those
+ files on the PPM Map generated by SPLAT!. Such files contain
+ the coordinates that describe the boundaries of cities,
+ counties, and states. */
+
+ int x;
+ double lat0, lon0, lat1, lon1;
+ char string[80];
+ struct site source, destination;
+ FILE *fd=NULL;
+
+ fd=fopen(filename,"r");
+
+ if (fd!=NULL)
+ {
+ fgets(string,78,fd);
+
+ fprintf(stdout,"Reading \"%s\"... ",filename);
+ fflush(stdout);
+
+ do
+ {
+ fgets(string,78,fd);
+ sscanf(string,"%lf %lf", &lon0, &lat0);
+ fgets(string,78,fd);
+
+ do
+ {
+ sscanf(string,"%lf %lf", &lon1, &lat1);
+
+ lon0=fabs(lon0);
+ lon1=fabs(lon1);
source.lat=lat0;
source.lon=lon0;
is not found, then the file "splat.lrp" is read from the
current working directory. Failure to load this file will
result in the default parameters hard coded into this
- being used and written to "splat.lrp". */
+ function to be used and written to "splat.lrp". */
- double din;
- char filename[255], lookup[256], string[80];
- int iin, ok=0, x;
- FILE *fd=NULL, *outfile=NULL;
+ double din;
+ char filename[255], string[80], *pointer=NULL;
+ int iin, ok=0, x;
+ FILE *fd=NULL, *outfile=NULL;
/* Default parameters in case things go bad */
filename[x+3]='p';
filename[x+4]=0;
- /* Small lookup table to parse file, pass
- numeric data, and ignore comments. */
-
- for (x=0; x<=255; x++)
- lookup[x]=0;
-
- /* Valid characters */
-
- for (x=48; x<=57; x++)
- lookup[x]=x;
-
- lookup[32]=32;
- lookup[46]='.';
-
fd=fopen(filename,"r");
if (fd==NULL)
{
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%lf", &din);
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%lf", &din);
}
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%lf", &din);
}
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%lf", &din);
}
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%d", &iin);
}
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%d", &iin);
}
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%lf", &din);
}
fgets(string,80,fd);
- for (x=0; lookup[(int)string[x]] && x<20; x++)
- string[x]=lookup[(int)string[x]];
+ pointer=strchr(string,';');
- string[x]=0;
+ if (pointer!=NULL)
+ *pointer=0;
ok=sscanf(string,"%lf", &din);
}
+ fclose(fd);
+
if (ok)
+ {
LR.rel=din;
-
- fclose(fd);
+ LoadPAT(filename);
+ }
}
if (fd==NULL)
outfile=fopen("splat.lrp","w");
fprintf(outfile,"%.3f\t; Earth Dielectric Constant (Relative permittivity)\n",LR.eps_dielect);
-
fprintf(outfile,"%.3f\t; Earth Conductivity (Siemens per meter)\n", LR.sgm_conductivity);
-
fprintf(outfile,"%.3f\t; Atmospheric Bending Constant (N-Units)\n",LR.eno_ns_surfref);
-
fprintf(outfile,"%.3f\t; Frequency in MHz (20 MHz to 20 GHz)\n", LR.frq_mhz);
-
fprintf(outfile,"%d\t; Radio Climate\n",LR.radio_climate);
-
fprintf(outfile,"%d\t; Polarization (0 = Horizontal, 1 = Vertical)\n", LR.pol);
-
fprintf(outfile,"%.2f\t; Fraction of situations\n",LR.conf);
-
fprintf(outfile, "%.2f\t; Fraction of time\n",LR.rel);
-
fprintf(outfile,"\nPlease consult SPLAT! documentation for the meaning and use of this data.\n");
fclose(outfile);
fprintf(stderr,"Longley-Rice default parameters have been assumed for this analysis.\n");
}
-struct site los(struct site source, struct site destination)
-{
- /* This function determines whether a line-of-sight path
- unobstructed by terrain exists between source (transmitter)
- and destination (receiver) based on the geographical
- locations of the two sites, their respective antenna
- heights above ground, and the terrain between them.
- A site structure is returned upon completion. If the
- first character of site.name is ' ', then a clear path
- exists between source and destination. If the first
- character is '*', then an obstruction exists, and the
- site.lat and site.lon elements of the structure provide
- the geographical location of the obstruction. */
-
- int x;
- char block;
- struct site test, blockage;
- register double distance, tx_alt, rx_alt,
- cos_xmtr_angle, cos_test_angle, test_alt;
-
- ReadPath(source,destination);
-
- distance=5280.0*Distance(source,destination);
- tx_alt=earthradius+source.alt+GetElevation(source);
- rx_alt=earthradius+destination.alt+GetElevation(destination);
-
- /* Elevation angle of the xmtr (source) as seen by the rcvr */
-
- cos_xmtr_angle=((rx_alt*rx_alt)+(distance*distance)-(tx_alt*tx_alt))/(2.0*rx_alt*distance);
-
- /* Determine the elevation angle of each discrete location
- along the path between the receiver and transmitter.
-
- Since obstructions are more likely due to terrain effects
- closest to the receiver rather than farther away, we start
- looking for potential obstructions from the receiver's
- location, and work our way towards the transmitter.
- This loop is broken when the first obstruction is
- detected. If we can travel all the way to the transmitter
- without detecting an obstruction, then we have a clear
- unobstructed path between transmitter and receiver. */
-
- for (x=path.length-1, block=0; x>0 && block==0; x--)
- {
- /* Build a structure for each test
- point along the path to be surveyed. */
-
- test.lat=path.lat[x];
- test.lon=path.lon[x];
-
- /* Measure the distance between the
- test point and the receiver locations */
-
- distance=5280.0*Distance(test,destination);
- test_alt=earthradius+path.elevation[x];
-
- /* Determine the cosine of the elevation of the test
- point as seen from the location of the receiver */
-
- cos_test_angle=((rx_alt*rx_alt)+(distance*distance)-(test_alt*test_alt))/(2.0*rx_alt*distance);
-
- /* If the elevation angle to the test point (as seen from
- the receiver) is greater than the elevation angle to the
- transmitter (as seen by the receiver), then we have a
- path obstructed by terrain. Note: Since we're comparing
- the cosines of these angles rather than the angles
- themselves (eliminating the call to acos() saves
- considerable time), the following "if" statement is
- reversed from what it would normally be if the angles
- were compared. */
-
- if (cos_xmtr_angle>cos_test_angle)
- {
- block=1;
- blockage.lat=path.lat[x];
- blockage.lon=path.lon[x];
- blockage.alt=path.elevation[x];
- blockage.name[0]='*';
- }
- }
-
- if (block==0)
- {
- blockage.lat=0.0;
- blockage.lon=0.0;
- blockage.alt=0.0;
- blockage.name[0]=' ';
- }
-
- return blockage;
-}
-
void PlotPath(struct site source, struct site destination, char mask_value)
{
/* This function analyzes the path between the source and
}
}
-void PlotLRPath(struct site source, struct site destination)
+void PlotLRPath(struct site source, struct site destination, FILE *fd)
{
- /* This function plots the RF signal path loss
- between source and destination points based
- on the Longley-Rice propagation model. */
-
- char strmode[100];
- int x, y, errnum;
- double loss;
+ /* This function plots the RF path loss between source and
+ destination points based on the Longley-Rice propagation
+ model, taking into account antenna pattern data, if available. */
+
+ char block=0, strmode[100];
+ int x, y, errnum;
+ double loss, azimuth, pattern=0.0,
+ source_alt, dest_alt, source_alt2, dest_alt2,
+ cos_xmtr_angle, cos_test_angle=0.0, test_alt,
+ elevation, distance=0.0,
+ four_thirds_earth;
+ struct site temp;
ReadPath(source,destination);
- elev_l[1]=0.04*METERS_PER_MILE;
+
+ four_thirds_earth=EARTHRADIUS*(4.0/3.0);
+
+ /* Copy elevations along path into the elev_l[] array. */
for (x=0; x<path.length; x++)
- elev_l[x+2]=path.elevation[x]*METERS_PER_FOOT;
-
- for (y=0; y<path.length; y++)
+ elev_l[x+2]=path.elevation[x]*METERS_PER_FOOT;
+
+ /* Since the only energy the Longley-Rice model considers
+ reaching the destination is based on what is scattered
+ or deflected from the first obstruction along the path,
+ we first need to find the location and elevation angle
+ of that first obstruction (if it exists). This is done
+ using a 4/3rds Earth radius to match the model used by
+ Longley-Rice. This information is required for properly
+ integrating the antenna's elevation pattern into the
+ calculation for overall path loss. (Using path.length-1
+ below avoids a Longley-Rice model error from occuring at
+ the destination point.) */
+
+ for (y=2; (y<(path.length-1) && path.distance[y]<=max_range); y++)
{
- /* Test this point only if it has not already been tested. */
+ /* Process this point only if it
+ has not already been processed. */
- if (GetMask(path.lat[y],path.lon[y])==0 && 0.04*y<=max_range)
+ if (GetMask(path.lat[y],path.lon[y])==0)
{
- elev_l[0]=y+1;
+ distance=5280.0*path.distance[y];
+ source_alt=four_thirds_earth+source.alt+path.elevation[0];
+ dest_alt=four_thirds_earth+destination.alt+path.elevation[y];
+ dest_alt2=dest_alt*dest_alt;
+ source_alt2=source_alt*source_alt;
+
+ /* Calculate the cosine of the elevation of
+ the receiver as seen by the transmitter. */
+
+ cos_xmtr_angle=((source_alt2)+(distance*distance)-(dest_alt2))/(2.0*source_alt*distance);
+
+ if (got_elevation_pattern || fd!=NULL)
+ {
+ /* If no antenna elevation pattern is available, and
+ no output file is designated, the following code
+ that determines the elevation angle to the first
+ obstruction along the path is bypassed. */
+
+ for (x=2, block=0; x<y && block==0; x++)
+ {
+ distance=5280.0*(path.distance[y]-path.distance[x]);
+ test_alt=four_thirds_earth+path.elevation[x];
+
+ /* Calculate the cosine of the elevation
+ angle of the terrain (test point)
+ as seen by the transmitter. */
+
+ cos_test_angle=((source_alt2)+(distance*distance)-(test_alt*test_alt))/(2.0*source_alt*distance);
+
+ /* Compare these two angles to determine if
+ an obstruction exists. Since we're comparing
+ the cosines of these angles rather than
+ the angles themselves, the sense of the
+ following "if" statement is reversed from
+ what it would be if the angles themselves
+ were compared. */
+
+ if (cos_xmtr_angle>cos_test_angle)
+ block=1;
+ }
+
+ /* At this point, we have the elevation angle
+ to the first obstruction (if it exists). */
+ }
+
+ /* Determine attenuation for each point along the
+ path using Longley-Rice's point_to_point mode
+ starting at y=2 (number_of_points = 1), the
+ shortest distance terrain can play a role in
+ path loss. */
+
+ elev_l[0]=y-1; /* (number of points - 1) */
+
+ /* Distance between elevation samples */
+ elev_l[1]=METERS_PER_MILE*(path.distance[y]-path.distance[y-1]);
point_to_point(elev_l,source.alt*METERS_PER_FOOT,
- destination.alt*METERS_PER_FOOT,
- LR.eps_dielect, LR.sgm_conductivity, LR.eno_ns_surfref,
- LR.frq_mhz, LR.radio_climate, LR.pol, LR.conf, LR.rel,
- loss, strmode, errnum);
+ destination.alt*METERS_PER_FOOT, LR.eps_dielect,
+ LR.sgm_conductivity, LR.eno_ns_surfref, LR.frq_mhz,
+ LR.radio_climate, LR.pol, LR.conf, LR.rel, loss,
+ strmode, errnum);
+
+ if (block)
+ elevation=((acos(cos_test_angle))/deg2rad)-90.0;
+
+ else
+ elevation=((acos(cos_xmtr_angle))/deg2rad)-90.0;
+
+ temp.lat=path.lat[y];
+ temp.lon=path.lon[y];
+
+ azimuth=(Azimuth(source,temp));
+
+ if (fd!=NULL)
+ {
+ /* Write path loss data to output file */
+
+ fprintf(fd,"%.7f, %.7f, %.3f, %.3f, %.2f\n",path.lat[y], path.lon[y], azimuth, elevation, loss);
+ }
+
+ /* Integrate the antenna's radiation
+ pattern into the overall path loss. */
- /* Note: PASS BY REFERENCE ... loss and errnum are
- passed by reference, and are only used in this
- file by this function */
+ x=(int)rint(10.0*(10.0-elevation));
+
+ if (x>=0 && x<=1000)
+ {
+ azimuth=rint(azimuth);
+
+ pattern=(double)LR.antenna_pattern[(int)azimuth][x];
+
+ if (pattern!=0.0)
+ {
+ pattern=20.0*log10(pattern);
+ loss-=pattern;
+ }
+ }
if (loss>225.0)
loss=225.0;
OrMask(path.lat[y],path.lon[y],((unsigned char)(loss))<<3);
}
- else if (GetMask(path.lat[y],path.lon[y])==0 && 0.04*y>max_range)
+ else if (GetMask(path.lat[y],path.lon[y])==0 && path.distance[y]>max_range)
OrMask(path.lat[y],path.lon[y],1);
}
}
count=0;
- fprintf(stdout,"\nComputing line-of-sight coverage of %s with an RX antenna\nat %.2f feet AGL:\n\n 0%c to 25%c ",source.name,altitude,37,37);
+ fprintf(stdout,"\nComputing line-of-sight coverage of %s with an RX antenna\nat %.2f %s AGL:\n\n 0%c to 25%c ",source.name,metric?altitude*METERS_PER_FOOT:altitude,metric?"meters":"feet",37,37);
fflush(stdout);
/* 18.75=1200 pixels/degree divided by 64 loops
}
}
-void PlotLRMap(struct site source, double altitude)
+void PlotLRMap(struct site source, double altitude, char *plo_filename)
{
/* This function performs a 360 degree sweep around the
transmitter site (source location), and plots the
struct site edge;
float lat, lon, one_pixel;
unsigned char symbol[4], x;
+ FILE *fd=NULL;
one_pixel=1.0/1200.0;
count=0;
fprintf(stdout,"\nComputing Longley-Rice coverage of %s ", source.name);
- fprintf(stdout,"out to a radius\nof %.2f miles with an RX antenna at %.2f feet AGL:\n\n 0%c to 25%c ",max_range,altitude,37,37);
+
+ fprintf(stdout,"out to a radius\nof %.2f %s with an RX antenna at %.2f %s AGL:\n\n 0%c to 25%c ",metric?max_range*KM_PER_MILE:max_range,metric?"kilometers":"miles",metric?altitude*METERS_PER_FOOT:altitude,metric?"meters":"feet",37,37);
fflush(stdout);
+ if (plo_filename[0]!=0)
+ fd=fopen(plo_filename,"wb");
+
+ if (fd!=NULL)
+ {
+ /* Write header information to output file */
+
+ fprintf(fd,"%d, %d\t; max_west, min_west\n%d, %d\t; max_north, min_north\n",max_west, min_west, max_north, min_north);
+ }
+
/* 18.75=1200 pixels/degree divided by 64 loops
per progress indicator symbol (.oOo) printed. */
edge.lon=lon;
edge.alt=altitude;
- PlotLRPath(source,edge);
+ PlotLRPath(source,edge,fd);
count++;
if (count==z)
edge.lon=min_west;
edge.alt=altitude;
- PlotLRPath(source,edge);
+ PlotLRPath(source,edge,fd);
count++;
if (count==z)
edge.lon=lon;
edge.alt=altitude;
- PlotLRPath(source,edge);
+ PlotLRPath(source,edge,fd);
count++;
if (count==z)
edge.lon=max_west;
edge.alt=altitude;
- PlotLRPath(source,edge);
+ PlotLRPath(source,edge,fd);
count++;
if (count==z)
}
}
+ if (fd!=NULL)
+ fclose(fd);
+
fprintf(stdout,"\nDone!\n");
fflush(stdout);
}
-void WritePPM(char *filename)
+void WritePPM(char *filename, unsigned char geo)
{
/* This function generates a topographic map in Portable Pix Map
(PPM) format based on logarithmically scaled topology data,
from its representation in dem[][] so that north points
up and east points right in the image generated. */
- char mapfile[255];
+ char mapfile[255], geofile[255];
unsigned char found, mask;
unsigned width, height, output;
int indx, x, y, x0=0, y0=0, minlat, minlon;
else
{
for (x=0; filename[x]!='.' && filename[x]!=0 && x<250; x++)
+ {
mapfile[x]=filename[x];
+ geofile[x]=filename[x];
+ }
mapfile[x]='.';
+ geofile[x]='.';
mapfile[x+1]='p';
+ geofile[x+1]='g';
mapfile[x+2]='p';
+ geofile[x+2]='e';
mapfile[x+3]='m';
+ geofile[x+3]='o';
mapfile[x+4]=0;
+ geofile[x+4]=0;
+ }
+
+ if (geo)
+ {
+ fd=fopen(geofile,"wb");
+
+ fprintf(fd,"FILENAME\t%s\n",mapfile);
+ fprintf(fd,"#\t\tX\tY\tLong\t\tLat\n");
+ fprintf(fd,"TIEPOINT\t0\t0\t%d.000\t\t%d.000\n",(max_west<180?-max_west:360-max_west),max_north);
+ fprintf(fd,"TIEPOINT\t%u\t%u\t%d.000\t\t%d.000\n",width-1,height-1,(min_west<180?-min_west:360-min_west),min_north);
+ fprintf(fd,"IMAGESIZE\t%u\t%u\n",width,height);
+ fprintf(fd,"#\n# Auto Generated by SPLAT! v%s\n#\n",splat_version);
+
+ fclose(fd);
}
fd=fopen(mapfile,"wb");
fflush(stdout);
}
-void WritePPMLR(char *filename)
+void WritePPMLR(char *filename, unsigned char geo)
{
/* This function generates a topographic map in Portable Pix Map
(PPM) format based on the content of flags held in the mask[][]
90 degrees from its representation in dem[][] so that north
points up and east points right in the image generated. */
- char mapfile[255];
+ char mapfile[255], geofile[255];
unsigned width, height, output;
unsigned char found, mask, cityorcounty;
int indx, x, y, t, t2, x0, y0, minlat, minlon, loss;
else
{
for (x=0; filename[x]!='.' && filename[x]!=0 && x<250; x++)
+ {
mapfile[x]=filename[x];
+ geofile[x]=filename[x];
+ }
mapfile[x]='.';
+ geofile[x]='.';
mapfile[x+1]='p';
+ geofile[x+1]='g';
mapfile[x+2]='p';
+ geofile[x+2]='e';
mapfile[x+3]='m';
+ geofile[x+3]='o';
mapfile[x+4]=0;
+ geofile[x+4]=0;
+ }
+
+ if (geo)
+ {
+ fd=fopen(geofile,"wb");
+
+ fprintf(fd,"FILENAME\t%s\n",mapfile);
+ fprintf(fd,"#\t\tX\tY\tLong\t\tLat\n");
+ fprintf(fd,"TIEPOINT\t0\t0\t%d.000\t\t%d.000\n",(max_west<180?-max_west:360-max_west),max_north);
+ fprintf(fd,"TIEPOINT\t%u\t%u\t%d.000\t\t%.3f\n",width-1,height+29,(min_west<180?-min_west:360-min_west),(double)(min_north-0.025));
+ fprintf(fd,"IMAGESIZE\t%u\t%u\n",width,height+30);
+ fprintf(fd,"#\n# Auto Generated by SPLAT! v%s\n#\n",splat_version);
+
+ fclose(fd);
}
fd=fopen(mapfile,"wb");
{
/* Text Labels - Black or Red */
- /* if ((mask&120) && (loss<=maxdB)) */
if ((mask&120) && (loss<=90))
fprintf(fd,"%c%c%c",0,0,0);
else
and destination locations. "filename" is the name assigned
to the output file generated by gnuplot. The filename extension
is used to set gnuplot's terminal setting and output file type.
- If no extension is found, .gif is assumed. */
+ If no extension is found, .png is assumed. */
- int x, y, z;
- char filename[255], term[15], ext[15];
- FILE *fd=NULL;
+ int x, y, z;
+ char filename[255], term[30], ext[15];
+ FILE *fd=NULL;
ReadPath(destination,source);
fd=fopen("profile.gp","wb");
for (x=0; x<path.length; x++)
- fprintf(fd,"%f\t%f\n",path.distance[x],path.elevation[x]);
+ {
+ if (metric)
+ fprintf(fd,"%f\t%f\n",KM_PER_MILE*path.distance[x],METERS_PER_FOOT*path.elevation[x]);
+
+ else
+ fprintf(fd,"%f\t%f\n",path.distance[x],path.elevation[x]);
+ }
fclose(fd);
/* Default filename and output file type */
strncpy(filename,"profile\0",8);
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
else
}
else
- { /* No extension -- Default is gif */
+ { /* No extension -- Default is png */
filename[x]=0;
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
}
strncpy(ext,"ps\0",3);
else if (strncmp(ext,"ps",2)==0)
- strncpy(term,"postscript\0",11);
+ strncpy(term,"postscript enhanced color\0",26);
fprintf(stdout,"Writing \"%s.%s\"...",filename,ext);
fflush(stdout);
fd=fopen("splat.gp","w");
fprintf(fd,"set grid\n");
fprintf(fd,"set autoscale\n");
+ fprintf(fd,"set encoding iso_8859_1\n");
fprintf(fd,"set term %s\n",term);
- fprintf(fd,"set title \"SPLAT! Terrain Profile\"\n");
- fprintf(fd,"set xlabel \"Distance Between %s and %s (miles)\"\n",destination.name,source.name);
- fprintf(fd,"set ylabel \"Ground Elevation Above Sea Level (feet)\"\n");
+ fprintf(fd,"set title \"SPLAT! Terrain Profile Between %s and %s (%.2f%c Azimuth)\"\n",destination.name, source.name, Azimuth(destination,source),176);
+
+ if (metric)
+ {
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f kilometers)\"\n",destination.name,source.name,KM_PER_MILE*Distance(source,destination));
+ fprintf(fd,"set ylabel \"Ground Elevation Above Sea Level (meters)\"\n");
+
+
+ }
+
+ else
+ {
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f miles)\"\n",destination.name,source.name,Distance(source,destination));
+ fprintf(fd,"set ylabel \"Ground Elevation Above Sea Level (feet)\"\n");
+ }
+
fprintf(fd,"set output \"%s.%s\"\n",filename,ext);
fprintf(fd,"plot \"profile.gp\" title \"\" with lines\n");
fclose(fd);
and destination locations. "filename" is the name assigned
to the output file generated by gnuplot. The filename extension
is used to set gnuplot's terminal setting and output file type.
- If no extension is found, .gif is assumed. */
+ If no extension is found, .png is assumed. */
- int x, y, z;
- char filename[255], term[15], ext[15];
- double angle, refangle, maxangle=-90.0;
- struct site remote;
- FILE *fd=NULL, *fd2=NULL;
+ int x, y, z;
+ char filename[255], term[30], ext[15];
+ double angle, refangle, maxangle=-90.0;
+ struct site remote;
+ FILE *fd=NULL, *fd2=NULL;
ReadPath(destination,source); /* destination=RX, source=TX */
refangle=ElevationAngle(destination,source);
remote.lon=path.lon[x];
remote.alt=0.0;
angle=ElevationAngle(destination,remote);
- fprintf(fd,"%f\t%f\n",path.distance[x],angle);
- fprintf(fd2,"%f\t%f\n",path.distance[x],refangle);
+
+ if (metric)
+ {
+ fprintf(fd,"%f\t%f\n",KM_PER_MILE*path.distance[x],angle);
+ fprintf(fd2,"%f\t%f\n",KM_PER_MILE*path.distance[x],refangle);
+ }
+
+ else
+ {
+ fprintf(fd,"%f\t%f\n",path.distance[x],angle);
+ fprintf(fd2,"%f\t%f\n",path.distance[x],refangle);
+ }
if (angle>maxangle)
maxangle=angle;
}
- fprintf(fd,"%f\t%f\n",path.distance[path.length-1],refangle);
- fprintf(fd2,"%f\t%f\n",path.distance[path.length-1],refangle);
+ if (metric)
+ {
+ fprintf(fd,"%f\t%f\n",KM_PER_MILE*path.distance[path.length-1],refangle);
+ fprintf(fd2,"%f\t%f\n",KM_PER_MILE*path.distance[path.length-1],refangle);
+ }
+
+ else
+ {
+ fprintf(fd,"%f\t%f\n",path.distance[path.length-1],refangle);
+ fprintf(fd2,"%f\t%f\n",path.distance[path.length-1],refangle);
+ }
fclose(fd);
fclose(fd2);
/* Default filename and output file type */
strncpy(filename,"profile\0",8);
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
else
}
else
- { /* No extension -- Default is gif */
+ { /* No extension -- Default is png */
filename[x]=0;
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
}
strncpy(ext,"ps\0",3);
else if (strncmp(ext,"ps",2)==0)
- strncpy(term,"postscript\0",11);
+ strncpy(term,"postscript enhanced color\0",26);
fprintf(stdout,"Writing \"%s.%s\"...",filename,ext);
fflush(stdout);
fprintf(fd,"set grid\n");
fprintf(fd,"set yrange [%2.3f to %2.3f]\n", (-fabs(refangle)-0.25), maxangle+0.25);
+ fprintf(fd,"set encoding iso_8859_1\n");
fprintf(fd,"set term %s\n",term);
- fprintf(fd,"set title \"SPLAT! Elevation Profile\"\n");
- fprintf(fd,"set xlabel \"Distance Between %s and %s (miles)\"\n",destination.name,source.name);
- fprintf(fd,"set ylabel \"Elevation Angle Along Path Between %s and %s (degrees)\"\n",destination.name,source.name);
+ fprintf(fd,"set title \"SPLAT! Elevation Profile Between %s and %s (%.2f%c azimuth)\"\n",destination.name,source.name,Azimuth(destination,source),176);
+
+ if (metric)
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f kilometers)\"\n",destination.name,source.name,KM_PER_MILE*Distance(source,destination));
+ else
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f miles)\"\n",destination.name,source.name,Distance(source,destination));
+
+
+ fprintf(fd,"set ylabel \"Elevation Angle Along LOS Path Between %s and %s (degrees)\"\n",destination.name,source.name);
fprintf(fd,"set output \"%s.%s\"\n",filename,ext);
- fprintf(fd,"plot \"profile.gp\" title \"Real Earth Profile\" with lines, \"reference.gp\" title \"Line Of Sight Path\" with lines\n");
+ fprintf(fd,"plot \"profile.gp\" title \"Real Earth Profile\" with lines, \"reference.gp\" title \"Line of Sight Path (%.2f%c elevation)\" with lines\n",refangle,176);
fclose(fd);
fprintf(stderr,"\n*** ERROR: Error occurred invoking gnuplot!\n");
}
-void GraphHeight(struct site source, struct site destination, char *name)
+void GraphHeight(struct site source, struct site destination, char *name, double f, unsigned char n)
{
/* This function invokes gnuplot to generate an appropriate
output file indicating the terrain profile between the source
- and destination locations. What is plotted is the height of
- land above or below a straight line between the receibe and
- transmit sites. "filename" is the name assigned to the output
- file generated by gnuplot. The filename extension is used
- to set gnuplot's terminal setting and output file type.
- If no extension is found, .gif is assumed. */
-
- int x, y, z;
- char filename[255], term[15], ext[15];
- double a, b, c, height, refangle, cangle, maxheight=-100000.0,
- minheight=100000.0;
- struct site remote;
- FILE *fd=NULL, *fd2=NULL;
+ and destination locations referenced to the line-of-sight path
+ between the receive and transmit sites. "filename" is the name
+ assigned to the output file generated by gnuplot. The filename
+ extension is used to set gnuplot's terminal setting and output
+ file type. If no extension is found, .png is assumed. */
+
+ int x, y, z;
+ char filename[255], term[30], ext[15];
+ double a, b, c, height=0.0, refangle, cangle, maxheight=-100000.0,
+ minheight=100000.0, lambda=0.0, f_zone=0.0, fpt6_zone=0.0,
+ nm=0.0, nb=0.0, ed=0.0, es=0.0, r=0.0, d=0.0, d1=0.0,
+ terrain, azimuth, distance, dheight=0.0, minterrain=100000.0,
+ minearth=100000.0, miny, maxy, min2y, max2y;
+ struct site remote;
+ FILE *fd=NULL, *fd2=NULL, *fd3=NULL, *fd4=NULL, *fd5=NULL;
ReadPath(destination,source); /* destination=RX, source=TX */
+ azimuth=Azimuth(destination,source);
+ distance=Distance(destination,source);
refangle=ElevationAngle(destination,source);
b=GetElevation(destination)+destination.alt+earthradius;
+ /* Wavelength and path distance (great circle) in feet. */
+
+ if (f)
+ {
+ lambda=9.8425e8/(f*1e6);
+ d=5280.0*path.distance[path.length-1];
+ }
+
+ if (n)
+ {
+ ed=GetElevation(destination);
+ es=GetElevation(source);
+ nb=-destination.alt-ed;
+ nm=(-source.alt-es-nb)/(path.distance[path.length-1]);
+ }
+
fd=fopen("profile.gp","wb");
fd2=fopen("reference.gp","wb");
+ fd5=fopen("curvature.gp", "wb");
- for (x=1; x<path.length-1; x++)
+ if (f)
+ {
+ fd3=fopen("fresnel.gp", "wb");
+ fd4=fopen("fresnel_pt_6.gp", "wb");
+ }
+
+ for (x=0; x<path.length; x++)
{
remote.lat=path.lat[x];
remote.lon=path.lon[x];
remote.alt=0.0;
- a=GetElevation(remote)+earthradius;
+ terrain=GetElevation(remote);
- cangle=5280.0*Distance(destination,remote)/earthradius;
+ if (x==0)
+ terrain+=destination.alt; /* RX antenna spike */
+ a=terrain+earthradius;
+ cangle=5280.0*Distance(destination,remote)/earthradius;
c=b*sin(refangle*deg2rad+HALFPI)/sin(HALFPI-refangle*deg2rad-cangle);
height=a-c;
- fprintf(fd,"%f\t%f\n",path.distance[x],height);
- fprintf(fd2,"%f\t%f\n",path.distance[x],0.);
+ /* Per Fink and Christiansen, Electronics
+ * Engineers' Handbook, 1989:
+ *
+ * H = sqrt(lamba * d1 * (d - d1)/d)
+ *
+ * where H is the distance from the LOS
+ * path to the first Fresnel zone boundary.
+ */
+
+ if (f)
+ {
+ d1=5280.0*path.distance[x];
+ f_zone=-1*sqrt(lambda*d1*(d-d1)/d);
+ fpt6_zone=0.6*f_zone;
+ }
+
+ if (n)
+ {
+ r=-(nm*path.distance[x])-nb;
+ height+=r;
+
+ if (f>0)
+ {
+ f_zone+=r;
+ fpt6_zone+=r;
+ }
+ }
+
+ else
+ r=0.0;
+
+ if (metric)
+ {
+ fprintf(fd,"%f\t%f\n",KM_PER_MILE*path.distance[x],METERS_PER_FOOT*height);
+ fprintf(fd2,"%f\t%f\n",KM_PER_MILE*path.distance[x],METERS_PER_FOOT*r);
+ fprintf(fd5,"%f\t%f\n",KM_PER_MILE*path.distance[x],METERS_PER_FOOT*(height-terrain));
+ }
+
+ else
+ {
+ fprintf(fd,"%f\t%f\n",path.distance[x],height);
+ fprintf(fd2,"%f\t%f\n",path.distance[x],r);
+ fprintf(fd5,"%f\t%f\n",path.distance[x],height-terrain);
+ }
+
+ if (f)
+ {
+ if (metric)
+ {
+ fprintf(fd3,"%f\t%f\n",KM_PER_MILE*path.distance[x],METERS_PER_FOOT*f_zone);
+ fprintf(fd4,"%f\t%f\n",KM_PER_MILE*path.distance[x],METERS_PER_FOOT*fpt6_zone);
+ }
+
+ else
+ {
+ fprintf(fd3,"%f\t%f\n",path.distance[x],f_zone);
+ fprintf(fd4,"%f\t%f\n",path.distance[x],fpt6_zone);
+ }
+
+ if (f_zone<minheight)
+ minheight=f_zone;
+ }
if (height>maxheight)
maxheight=height;
if (height<minheight)
minheight=height;
+
+ if (r>maxheight)
+ maxheight=r;
+
+ if (terrain<minterrain)
+ minterrain=terrain;
+
+ if ((height-terrain)<minearth)
+ minearth=height-terrain;
+ }
+
+ if (n)
+ r=-(nm*path.distance[path.length-1])-nb;
+ else
+ r=0.0;
+
+ if (metric)
+ {
+ fprintf(fd,"%f\t%f\n",KM_PER_MILE*path.distance[path.length-1],METERS_PER_FOOT*r);
+ fprintf(fd2,"%f\t%f\n",KM_PER_MILE*path.distance[path.length-1],METERS_PER_FOOT*r);
+ }
+
+ else
+ {
+ fprintf(fd,"%f\t%f\n",path.distance[path.length-1],r);
+ fprintf(fd2,"%f\t%f\n",path.distance[path.length-1],r);
+ }
+
+ if (f)
+ {
+ if (metric)
+ {
+ fprintf(fd3,"%f\t%f\n",path.distance[path.length-1],r);
+ fprintf(fd4,"%f\t%f\n",path.distance[path.length-1],r);
+ }
+
+ else
+ {
+ fprintf(fd3,"%f\t%f\n",KM_PER_MILE*path.distance[path.length-1],METERS_PER_FOOT*r);
+ fprintf(fd4,"%f\t%f\n",KM_PER_MILE*path.distance[path.length-1],METERS_PER_FOOT*r);
+ }
}
+
+ if (r>maxheight)
+ maxheight=r;
- fprintf(fd,"%f\t%f\n",path.distance[path.length-1],0.0);
- fprintf(fd2,"%f\t%f\n",path.distance[path.length-1],0.0);
+ if (r<minheight)
+ minheight=r;
fclose(fd);
fclose(fd2);
+ fclose(fd5);
+
+ if (f)
+ {
+ fclose(fd3);
+ fclose(fd4);
+ }
if (name[0]==0)
{
/* Default filename and output file type */
strncpy(filename,"height\0",8);
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
else
}
else
- { /* No extension -- Default is gif */
+ { /* No extension -- Default is png */
filename[x]=0;
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
}
strncpy(ext,"ps\0",3);
else if (strncmp(ext,"ps",2)==0)
- strncpy(term,"postscript\0",11);
+ strncpy(term,"postscript enhanced color\0",26);
fprintf(stdout,"Writing \"%s.%s\"...",filename,ext);
fflush(stdout);
fd=fopen("splat.gp","w");
- minheight-=20.0;
- maxheight+=20.0;
+ dheight=maxheight-minheight;
+ miny=minheight-0.15*dheight;
+ maxy=maxheight+0.05*dheight;
- if (maxheight<20.0)
- maxheight=20.0;
+ if (maxy<20.0)
+ maxy=20.0;
+
+ dheight=maxheight-minheight;
+ min2y=miny-minterrain+0.05*dheight;
+
+ if (minearth<min2y)
+ {
+ miny-=min2y-minearth+0.05*dheight;
+ min2y=minearth-0.05*dheight;
+ }
+ max2y=min2y+maxy-miny;
+
fprintf(fd,"set grid\n");
- fprintf(fd,"set yrange [%2.3f to %2.3f]\n", minheight, maxheight);
+ fprintf(fd,"set yrange [%2.3f to %2.3f]\n", metric?miny*METERS_PER_FOOT:miny, metric?maxy*METERS_PER_FOOT:maxy);
+ fprintf(fd,"set y2range [%2.3f to %2.3f]\n", metric?min2y*METERS_PER_FOOT:min2y, metric?max2y*METERS_PER_FOOT:max2y);
+ fprintf(fd,"set xrange [-0.5 to %2.3f]\n",metric?KM_PER_MILE*rint(distance+0.5):rint(distance+0.5));
+ fprintf(fd,"set encoding iso_8859_1\n");
fprintf(fd,"set term %s\n",term);
- fprintf(fd,"set title \"SPLAT! Height Profile\"\n");
- fprintf(fd,"set xlabel \"Distance Between %s and %s (miles)\"\n",destination.name,source.name);
- fprintf(fd,"set ylabel \"Ground Height Above Path Between %s and %s (feet)\"\n",destination.name,source.name);
+
+ if (f)
+ fprintf(fd,"set title \"SPLAT! Path Profile Between %s and %s (%.2f%c azimuth)\\nWith First Fresnel Zone\"\n",destination.name, source.name, azimuth,176);
+
+ else
+ fprintf(fd,"set title \"SPLAT! Height Profile Between %s and %s (%.2f%c azimuth)\"\n",destination.name, source.name, azimuth,176);
+
+ if (metric)
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f kilometers)\"\n",destination.name,source.name,KM_PER_MILE*Distance(source,destination));
+ else
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f miles)\"\n",destination.name,source.name,Distance(source,destination));
+
+ if (n)
+ {
+ if (metric)
+ fprintf(fd,"set ylabel \"Normalized Height Referenced To LOS Path Between\\n%s and %s (meters)\"\n",destination.name,source.name);
+
+ else
+ fprintf(fd,"set ylabel \"Normalized Height Referenced To LOS Path Between\\n%s and %s (feet)\"\n",destination.name,source.name);
+
+ }
+
+ else
+ {
+ if (metric)
+ fprintf(fd,"set ylabel \"Height Referenced To LOS Path Between %s and %s (meters)\"\n",destination.name,source.name);
+
+ else
+ fprintf(fd,"set ylabel \"Height Referenced To LOS Path Between %s and %s (feet)\"\n",destination.name,source.name);
+ }
+
fprintf(fd,"set output \"%s.%s\"\n",filename,ext);
- fprintf(fd,"plot \"profile.gp\" title \"Real Earth Profile\" with lines, \"reference.gp\" title \"Line Of Sight Path\" with lines\n");
+
+ if (f)
+ fprintf(fd,"plot \"profile.gp\" title \"Point-to-Point Profile\" with lines, \"reference.gp\" title \"Line of Sight Path\" with lines, \"curvature.gp\" axes x1y2 title \"Earth's Curvature Contour\" with lines, \"fresnel.gp\" axes x1y1 title \"First Fresnel Zone (%.3f MHz)\" with lines, \"fresnel_pt_6.gp\" title \"60%% of First Fresnel Zone\" with lines\n",f);
+
+ else
+ fprintf(fd,"plot \"profile.gp\" title \"Point-to-Point Profile\" with lines, \"reference.gp\" title \"Line Of Sight Path\" with lines, \"curvature.gp\" axes x1y2 title \"Earth's Curvature Contour\" with lines\n");
fclose(fd);
{
unlink("splat.gp");
unlink("profile.gp");
- unlink("reference.gp");
+ unlink("reference.gp");
+ unlink("curvature.gp");
+
+ if (f)
+ {
+ unlink("fresnel.gp");
+ unlink("fresnel_pt_6.gp");
+ }
+
fprintf(stdout," Done!\n");
fflush(stdout);
}
{
/* This function invokes gnuplot to generate an appropriate
output file indicating the Longley-Rice model loss between
- the source and destination locations. "filename" is the
+ the source and destination locations. "filename" is the
name assigned to the output file generated by gnuplot.
The filename extension is used to set gnuplot's terminal
setting and output file type. If no extension is found,
- .gif is assumed. */
-
- int x, y, z, errnum, errflag=0;
- char filename[255], term[15], ext[15], strmode[100], report_name[80];
- double maxloss=-100000.0, minloss=100000.0, loss, haavt, angle;
- FILE *fd=NULL, *fd2=NULL;
+ .png is assumed. */
+
+ int x, y, z, errnum, errflag=0;
+ char filename[255], term[30], ext[15], strmode[100],
+ report_name[80], block=0;
+ double maxloss=-100000.0, minloss=100000.0, loss, haavt,
+ angle1, angle2, azimuth, pattern=1.0, patterndB=0.0,
+ total_loss=0.0, cos_xmtr_angle, cos_test_angle=0.0,
+ source_alt, test_alt, dest_alt, source_alt2, dest_alt2,
+ distance, elevation, four_thirds_earth;
+ FILE *fd=NULL, *fd2=NULL;
sprintf(report_name,"%s-to-%s.lro",source.name,destination.name);
+ four_thirds_earth=EARTHRADIUS*(4.0/3.0);
+
for (x=0; report_name[x]!=0; x++)
if (report_name[x]==32 || report_name[x]==17 || report_name[x]==92 || report_name[x]==42 || report_name[x]==47)
report_name[x]='_';
}
fprintf(fd2, "%s W)\n", dec2dms(source.lon));
- fprintf(fd2,"Ground elevation: %.2f feet AMSL\n",GetElevation(source));
- fprintf(fd2,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",source.alt, source.alt+GetElevation(source));
+
+ if (metric)
+ {
+ fprintf(fd2,"Ground elevation: %.2f meters AMSL\n",METERS_PER_FOOT*GetElevation(source));
+ fprintf(fd2,"Antenna height: %.2f meters AGL / %.2f meters AMSL\n",METERS_PER_FOOT*source.alt,METERS_PER_FOOT*(source.alt+GetElevation(source)));
+ }
+
+ else
+ {
+ fprintf(fd2,"Ground elevation: %.2f feet AMSL\n",GetElevation(source));
+ fprintf(fd2,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",source.alt, source.alt+GetElevation(source));
+ }
haavt=haat(source);
if (haavt>-4999.0)
- fprintf(fd2,"Antenna height above average terrain: %.2f feet\n",haavt);
+ {
+ if (metric)
+ fprintf(fd2,"Antenna height above average terrain: %.2f meters\n",METERS_PER_FOOT*haavt);
+ else
+ fprintf(fd2,"Antenna height above average terrain: %.2f feet\n",haavt);
+ }
+
+ azimuth=Azimuth(source,destination);
+ angle1=ElevationAngle(source,destination);
+ angle2=ElevationAngle2(source,destination,earthradius);
+
+ if (got_azimuth_pattern || got_elevation_pattern)
+ {
+ x=(int)rint(10.0*(10.0-angle2));
+
+ if (x>=0 && x<=1000)
+ pattern=(double)LR.antenna_pattern[(int)rint(azimuth)][x];
+
+ patterndB=20.0*log10(pattern);
+
+ fprintf(fd2,"Antenna pattern between %s and %s: %.3f (%.2f dB)\n",source.name, destination.name, pattern, patterndB);
+
+ }
+
+ if (metric)
+ fprintf(fd2,"Distance to %s: %.2f kilometers\n",destination.name,METERS_PER_FOOT*Distance(source,destination));
- fprintf(fd2,"Distance to %s: %.2f miles.\n",destination.name,Distance(source,destination));
- fprintf(fd2,"Azimuth to %s: %.2f degrees.\n",destination.name,Azimuth(source,destination));
+ else
+ fprintf(fd2,"Distance to %s: %.2f miles.\n",destination.name,Distance(source,destination));
+
+ fprintf(fd2,"Azimuth to %s: %.2f degrees\n",destination.name,azimuth);
- angle=ElevationAngle(source,destination);
+ if (angle1>=0.0)
+ fprintf(fd2,"Elevation angle to %s: %+.4f degrees\n",destination.name,angle1);
- if (angle>=0.0)
- fprintf(fd2,"Angle of elevation between %s and %s: %+.4f degrees.\n",source.name,destination.name,angle);
+ else
+ fprintf(fd2,"Depression angle to %s: %+.4f degrees\n",destination.name,angle1);
- if (angle<0.0)
- fprintf(fd2,"Angle of depression between %s and %s: %+.4f degrees.\n",source.name,destination.name,angle);
+ if (angle1!=angle2)
+ {
+ if (angle2<0.0)
+ fprintf(fd2,"Depression");
+ else
+ fprintf(fd2,"Elevation");
+
+ fprintf(fd2," angle to the first obstruction: %+.4f degrees\n",angle2);
+ }
fprintf(fd2,"\n-------------------------------------------------------------------------\n\n");
}
fprintf(fd2, "%s W)\n", dec2dms(destination.lon));
- fprintf(fd2,"Ground elevation: %.2f feet AMSL\n",GetElevation(destination));
- fprintf(fd2,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",destination.alt, destination.alt+GetElevation(destination));
+
+ if (metric)
+ {
+ fprintf(fd2,"Ground elevation: %.2f meters AMSL\n",METERS_PER_FOOT*GetElevation(destination));
+ fprintf(fd2,"Antenna height: %.2f meters AGL / %.2f meters AMSL\n",METERS_PER_FOOT*destination.alt, METERS_PER_FOOT*(destination.alt+GetElevation(destination)));
+ }
+
+ else
+ {
+ fprintf(fd2,"Ground elevation: %.2f feet AMSL\n",GetElevation(destination));
+ fprintf(fd2,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",destination.alt, destination.alt+GetElevation(destination));
+ }
haavt=haat(destination);
if (haavt>-4999.0)
- fprintf(fd2,"Antenna height above average terrain: %.2f feet\n",haavt);
+ {
+ if (metric)
+ fprintf(fd2,"Antenna height above average terrain: %.2f meters\n",METERS_PER_FOOT*haavt);
+ else
+ fprintf(fd2,"Antenna height above average terrain: %.2f feet\n",haavt);
+ }
+
+ if (metric)
+ fprintf(fd2,"Distance to %s: %.2f kilometers\n",source.name,KM_PER_MILE*Distance(source,destination));
+
+ else
+ fprintf(fd2,"Distance to %s: %.2f miles\n",source.name,Distance(source,destination));
+
+ azimuth=Azimuth(destination,source);
- fprintf(fd2,"Distance to %s: %.2f miles.\n",source.name,Distance(source,destination));
- fprintf(fd2,"Azimuth to %s: %.2f degrees.\n",source.name,Azimuth(destination,source));
+ angle1=ElevationAngle(destination,source);
+ angle2=ElevationAngle2(destination,source,earthradius);
- angle=ElevationAngle(destination,source);
+ fprintf(fd2,"Azimuth to %s: %.2f degrees.\n",source.name,azimuth);
- if (angle>=0.0)
- fprintf(fd2,"Angle of elevation between %s and %s: %+.4f degrees.\n",destination.name,source.name,angle);
+ if (angle1>=0.0)
+ fprintf(fd2,"Elevation angle to %s: %+.4f degrees\n",source.name,angle1);
- if (angle<0.0)
- fprintf(fd2,"Angle of depression between %s and %s: %+.4f degrees.\n",destination.name,source.name,angle);
+ else
+ fprintf(fd2,"Depression angle to %s: %+.4f degrees\n",source.name,angle1);
+
+ if (angle1!=angle2)
+ {
+ if (angle2<0.0)
+ fprintf(fd2,"Depression");
+ else
+ fprintf(fd2,"Elevation");
+
+ fprintf(fd2," angle to the first obstruction: %+.4f degrees\n",angle2);
+ }
fprintf(fd2,"\n-------------------------------------------------------------------------\n\n");
fprintf(fd2,")\nFraction of Situations: %.1lf%c\n",LR.conf*100.0,37);
fprintf(fd2,"Fraction of Time: %.1lf%c\n",LR.rel*100.0,37);
-
fprintf(fd2,"\n-------------------------------------------------------------------------\n\n");
fprintf(fd2,"Analysis Results:\n\n");
- ReadPath(source, destination); /* destination=RX, source=TX */
+ ReadPath(source, destination); /* source=TX, destination=RX */
- elev_l[1]=0.04*METERS_PER_MILE;
+ /* Copy elevations along path into the elev_l[] array. */
- for (x=1; x<path.length; x++)
- elev_l[x+1]=path.elevation[x]*METERS_PER_FOOT;
+ for (x=0; x<path.length; x++)
+ elev_l[x+2]=path.elevation[x]*METERS_PER_FOOT;
+
+ if (metric)
+ fprintf(fd2,"Distance (km)");
+ else
+ fprintf(fd2,"Distance (mi)");
- fprintf(fd2,"Distance (mi)\tLoss (dB)\tErrnum\tComment\n\n");
+ fprintf(fd2,"\tLoss (dB)\tErrnum\tComment\n\n");
fd=fopen("profile.gp","w");
- for (x=2; x<path.length; x++)
+ azimuth=rint(Azimuth(source,destination));
+
+ for (y=2; y<(path.length-1); y++) /* path.length-1 avoids LR error */
{
- elev_l[0]=x-1;
+ distance=5280.0*path.distance[y];
+ source_alt=four_thirds_earth+source.alt+path.elevation[0];
+ dest_alt=four_thirds_earth+destination.alt+path.elevation[y];
+ dest_alt2=dest_alt*dest_alt;
+ source_alt2=source_alt*source_alt;
+
+ /* Calculate the cosine of the elevation of
+ the receiver as seen by the transmitter. */
+
+ cos_xmtr_angle=((source_alt2)+(distance*distance)-(dest_alt2))/(2.0*source_alt*distance);
+
+ if (got_elevation_pattern)
+ {
+ /* If an antenna elevation pattern is available, the
+ following code determines the elevation angle to
+ the first obstruction along the path. */
+
+ for (x=2, block=0; x<y && block==0; x++)
+ {
+ distance=5280.0*(path.distance[y]-path.distance[x]);
+ test_alt=four_thirds_earth+path.elevation[x];
+
+ /* Calculate the cosine of the elevation
+ angle of the terrain (test point)
+ as seen by the transmitter. */
+
+ cos_test_angle=((source_alt2)+(distance*distance)-(test_alt*test_alt))/(2.0*source_alt*distance);
+
+ /* Compare these two angles to determine if
+ an obstruction exists. Since we're comparing
+ the cosines of these angles rather than
+ the angles themselves, the sense of the
+ following "if" statement is reversed from
+ what it would be if the angles themselves
+ were compared. */
+
+ if (cos_xmtr_angle>cos_test_angle)
+ block=1;
+ }
+
+ /* At this point, we have the elevation angle
+ to the first obstruction (if it exists). */
+ }
+
+ /* Determine path loss for each point along the
+ path using Longley-Rice's point_to_point mode
+ starting at x=2 (number_of_points = 1), the
+ shortest distance terrain can play a role in
+ path loss. */
+
+ elev_l[0]=y-1; /* (number of points - 1) */
+
+ /* Distance between elevation samples */
+ elev_l[1]=METERS_PER_MILE*(path.distance[y]-path.distance[y-1]);
point_to_point(elev_l, source.alt*METERS_PER_FOOT,
- destination.alt*METERS_PER_FOOT,
- LR.eps_dielect, LR.sgm_conductivity, LR.eno_ns_surfref,
- LR.frq_mhz, LR.radio_climate, LR.pol, LR.conf, LR.rel,
- loss, strmode, errnum);
+ destination.alt*METERS_PER_FOOT, LR.eps_dielect,
+ LR.sgm_conductivity, LR.eno_ns_surfref, LR.frq_mhz,
+ LR.radio_climate, LR.pol, LR.conf, LR.rel, loss,
+ strmode, errnum);
+
+ if (block)
+ elevation=((acos(cos_test_angle))/deg2rad)-90.0;
+ else
+ elevation=((acos(cos_xmtr_angle))/deg2rad)-90.0;
+
+ /* Integrate the antenna's radiation
+ pattern into the overall path loss. */
+
+ x=(int)rint(10.0*(10.0-elevation));
+
+ if (x>=0 && x<=1000)
+ {
+ pattern=(double)LR.antenna_pattern[(int)azimuth][x];
+
+ if (pattern!=0.0)
+ patterndB=20.0*log10(pattern);
+ }
- /* Note: PASS BY REFERENCE ... loss and errnum are
- passed by reference, and are only used in this
- file by this function */
+ else
+ patterndB=0.0;
+
+ total_loss=loss-patterndB;
+ if (metric)
+ {
+ fprintf(fd,"%f\t%f\n",KM_PER_MILE*(path.distance[path.length-1]-path.distance[y]),total_loss);
+ fprintf(fd2,"%7.2f\t\t%7.2f\t\t %d\t%s\n",KM_PER_MILE*path.distance[y],total_loss, errnum, strmode);
+ }
- fprintf(fd,"%f\t%f\n",path.distance[path.length-1]-path.distance[x],loss);
- fprintf(fd2,"%7.2f\t\t%7.2f\t\t %d\t%s\n",path.distance[x],loss, errnum, strmode);
+ else
+ {
+ fprintf(fd,"%f\t%f\n",path.distance[path.length-1]-path.distance[y],total_loss);
+ fprintf(fd2,"%7.2f\t\t%7.2f\t\t %d\t%s\n",path.distance[y],total_loss, errnum, strmode);
+ }
errflag|=errnum;
-
- if (loss>maxloss)
- maxloss=loss;
- if (loss<minloss)
- minloss=loss;
+ if (total_loss>maxloss)
+ maxloss=total_loss;
+
+ if (total_loss<minloss)
+ minloss=total_loss;
}
fclose(fd);
+ fprintf(fd2,"\nLongley-Rice path loss between %s and %s is %.2f dB.\n",source.name, destination.name, loss);
+
+ if (patterndB!=0.0)
+ fprintf(fd2,"Total path loss including TX antenna pattern is %.2f dB.\n",total_loss);
+
if (errflag)
{
- fprintf(fd2,"\nNotes on \"errnum\"...\n\n");
+ fprintf(fd2,"\nNotes on \"errnum\":\n\n");
fprintf(fd2," 0: No error. :-)\n");
fprintf(fd2," 1: Warning! Some parameters are nearly out of range.\n");
fprintf(fd2," Results should be used with caution.\n");
fprintf(fd2," Results are probably invalid.\n\nEnd of Report\n");
}
- fprintf(stdout,"Longley-Rice Path Loss between %s and %s is %.2f db\n",source.name, destination.name, loss);
+ fprintf(stdout,"Longley-Rice path loss between %s and %s is %.2f dB.\n",source.name, destination.name, loss);
+
+ if (patterndB!=0.0)
+ fprintf(stdout,"Total path loss including TX antenna pattern is %.2f dB.\n",total_loss);
+
fprintf(stdout,"Path Loss Report written to: \"%s\"\n",report_name);
fflush(stdout);
/* Default filename and output file type */
strncpy(filename,"loss\0",5);
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
else
}
else
- { /* No extension -- Default is gif */
+ { /* No extension -- Default is png */
filename[x]=0;
- strncpy(term,"gif\0",4);
- strncpy(ext,"gif\0",4);
+ strncpy(term,"png\0",4);
+ strncpy(ext,"png\0",4);
}
}
strncpy(ext,"ps\0",3);
else if (strncmp(ext,"ps",2)==0)
- strncpy(term,"postscript\0",11);
+ strncpy(term,"postscript enhanced color\0",26);
fprintf(stdout,"Writing \"%s.%s\"...",filename,ext);
fflush(stdout);
fprintf(fd,"set grid\n");
fprintf(fd,"set yrange [%2.3f to %2.3f]\n", minloss, maxloss);
+ fprintf(fd,"set encoding iso_8859_1\n");
fprintf(fd,"set term %s\n",term);
- fprintf(fd,"set title \"SPLAT! Loss Profile\"\n");
- fprintf(fd,"set xlabel \"Distance Between %s and %s (miles)\"\n",destination.name,source.name);
- fprintf(fd,"set ylabel \"Longley-Rice Loss (dB)\"\n");
- fprintf(fd,"set output \"%s.%s\"\n",filename,ext);
- fprintf(fd,"plot \"profile.gp\" title \"Longley-Rice Loss\" with lines\n");
+ fprintf(fd,"set title \"SPLAT! Loss Profile Along Path Between %s and %s (%.2f%c azimuth)\"\n",destination.name, source.name, Azimuth(destination,source),176);
+
+ if (metric)
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f kilometers)\"\n",destination.name,source.name,KM_PER_MILE*Distance(destination,source));
+ else
+ fprintf(fd,"set xlabel \"Distance Between %s and %s (%.2f miles)\"\n",destination.name,source.name,Distance(destination,source));
+
+ if (got_azimuth_pattern || got_elevation_pattern)
+ fprintf(fd,"set ylabel \"Total Path Loss (including TX antenna pattern) (dB)");
+ else
+ fprintf(fd,"set ylabel \"Longley-Rice Path Loss (dB)");
+
+ fprintf(fd,"\"\nset output \"%s.%s\"\n",filename,ext);
+ fprintf(fd,"plot \"profile.gp\" title \"Path Loss\" with lines\n");
fclose(fd);
fprintf(stderr,"\n*** ERROR: Error occurred invoking gnuplot!\n");
}
-void ObstructionReport(struct site xmtr, struct site rcvr, char report)
+void ObstructionReport(struct site xmtr, struct site rcvr, char report, double f)
{
- struct site result, result2, new_site;
- double angle, haavt;
- unsigned char block;
- char report_name[80], string[255];
- int x;
- FILE *fd;
+ int x;
+ struct site site_x;
+ double h_r, h_t, h_x, h_r_orig, cos_tx_angle, cos_test_angle,
+ cos_tx_angle_f1, cos_tx_angle_fpt6, haavt, d_tx, d_x,
+ h_r_f1, h_r_fpt6, h_f, h_los, lambda=0.0, azimuth,
+ pattern, patterndB, distance, angle1, angle2;
+ char report_name[80], string[255], string_fpt6[255],
+ string_f1[255];
+ FILE *fd;
sprintf(report_name,"%s-to-%s.txt",xmtr.name,rcvr.name);
fd=fopen(report_name,"w");
fprintf(fd,"\n\t\t--==[ SPLAT! v%s Obstruction Report ]==--\n\n",splat_version);
- fprintf(fd,"Analysis of line-of-sight path conditions between %s and %s:\n",xmtr.name, rcvr.name);
+ fprintf(fd,"Analysis of great circle path between %s and %s:\n",xmtr.name, rcvr.name);
fprintf(fd,"\n-------------------------------------------------------------------------\n\n");
fprintf(fd,"Transmitter site: %s\n",xmtr.name);
}
fprintf(fd, "%s W)\n", dec2dms(xmtr.lon));
- fprintf(fd,"Ground elevation: %.2f feet AMSL\n",GetElevation(xmtr));
- fprintf(fd,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",xmtr.alt, xmtr.alt+GetElevation(xmtr));
+
+ if (metric)
+ {
+ fprintf(fd,"Ground elevation: %.2f meters AMSL\n",METERS_PER_FOOT*GetElevation(xmtr));
+ fprintf(fd,"Antenna height: %.2f meters AGL / %.2f meters AMSL\n",METERS_PER_FOOT*xmtr.alt, METERS_PER_FOOT*(xmtr.alt+GetElevation(xmtr)));
+ }
+
+ else
+ {
+ fprintf(fd,"Ground elevation: %.2f feet AMSL\n",GetElevation(xmtr));
+ fprintf(fd,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",xmtr.alt, xmtr.alt+GetElevation(xmtr));
+ }
haavt=haat(xmtr);
if (haavt>-4999.0)
- fprintf(fd,"Antenna height above average terrain: %.2f feet\n",haavt);
+ {
+ if (metric)
+ fprintf(fd,"Antenna height above average terrain: %.2f meters\n",METERS_PER_FOOT*haavt);
+ else
+ fprintf(fd,"Antenna height above average terrain: %.2f feet\n",haavt);
+ }
+
+ pattern=1.0;
+ patterndB=0.0;
+ distance=Distance(xmtr,rcvr);
+ azimuth=Azimuth(xmtr,rcvr);
+ angle1=ElevationAngle(xmtr,rcvr);
+ angle2=ElevationAngle2(xmtr,rcvr,earthradius);
+
+ if (got_azimuth_pattern || got_elevation_pattern)
+ {
+ x=(int)rint(10.0*(10.0-angle2));
+
+ if (x>=0 && x<=1000)
+ pattern=(double)LR.antenna_pattern[(int)rint(azimuth)][x];
+
+ if (pattern!=1.0)
+ {
+ fprintf(fd,"Antenna pattern toward %s: %.3f",rcvr.name,pattern);
+ patterndB=20.0*log10(pattern);
+ fprintf(fd," (%.2f dB)\n",patterndB);
+ }
+ }
- fprintf(fd,"Distance to %s: %.2f miles.\n",rcvr.name,Distance(xmtr,rcvr));
- fprintf(fd,"Azimuth to %s: %.2f degrees.\n",rcvr.name,Azimuth(xmtr,rcvr));
+ if (metric)
+ fprintf(fd,"Distance to %s: %.2f kilometers\n",rcvr.name,KM_PER_MILE*distance);
+
+ else
+ fprintf(fd,"Distance to %s: %.2f miles\n",rcvr.name,distance);
- angle=ElevationAngle(xmtr,rcvr);
+ fprintf(fd,"Azimuth to %s: %.2f degrees\n",rcvr.name,azimuth);
+
+ if (angle1>=0.0)
+ fprintf(fd,"Elevation angle to %s: %+.4f degrees\n",rcvr.name,angle1);
+
+ else
+ fprintf(fd,"Depression angle to %s: %+.4f degrees\n",rcvr.name,angle1);
- if (angle>=0.0)
- fprintf(fd,"Angle of elevation between %s and %s: %+.4f degrees.\n",xmtr.name,rcvr.name,angle);
+ if (angle1!=angle2)
+ {
+ if (angle2<0.0)
+ fprintf(fd,"Depression");
+ else
+ fprintf(fd,"Elevation");
- if (angle<0.0)
- fprintf(fd,"Angle of depression between %s and %s: %+.4f degrees.\n",xmtr.name,rcvr.name,angle);
+ fprintf(fd," angle to the first obstruction: %+.4f degrees\n",angle2);
+ }
fprintf(fd,"\n-------------------------------------------------------------------------\n\n");
fprintf(fd, " (%s S / ", dec2dms(rcvr.lat));
}
- fprintf(fd, "%s W)\n", dec2dms(rcvr.lon));
- fprintf(fd,"Ground elevation: %.2f feet AMSL\n",GetElevation(rcvr));
- fprintf(fd,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",rcvr.alt, rcvr.alt+GetElevation(rcvr));
+ fprintf(fd, "%s W)\n", dec2dms(rcvr.lon));
+
+ if (metric)
+ {
+ fprintf(fd,"Ground elevation: %.2f meters AMSL\n",METERS_PER_FOOT*GetElevation(rcvr));
+ fprintf(fd,"Antenna height: %.2f meters AGL / %.2f meters AMSL\n",METERS_PER_FOOT*rcvr.alt, METERS_PER_FOOT*(rcvr.alt+GetElevation(rcvr)));
+ }
+
+ else
+ {
+ fprintf(fd,"Ground elevation: %.2f feet AMSL\n",GetElevation(rcvr));
+ fprintf(fd,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",rcvr.alt, rcvr.alt+GetElevation(rcvr));
+ }
+
+ haavt=haat(rcvr);
+
+ if (haavt>-4999.0)
+ {
+ if (metric)
+ fprintf(fd,"Antenna height above average terrain: %.2f meters\n",METERS_PER_FOOT*haavt);
+ else
+ fprintf(fd,"Antenna height above average terrain: %.2f feet\n",haavt);
+ }
+
+ azimuth=Azimuth(rcvr,xmtr);
+ angle1=ElevationAngle(rcvr,xmtr);
+ angle2=ElevationAngle2(rcvr,xmtr,earthradius);
+
+ if (metric)
+ fprintf(fd,"Distance to %s: %.2f kilometers\n",xmtr.name,KM_PER_MILE*distance);
+ else
+ fprintf(fd,"Distance to %s: %.2f miles\n",xmtr.name,distance);
+
+ fprintf(fd,"Azimuth to %s: %.2f degrees\n",xmtr.name,azimuth);
+
+ if (angle1>=0.0)
+ fprintf(fd,"Elevation to %s: %+.4f degrees\n",xmtr.name,angle1);
+
+ else
+ fprintf(fd,"Depression angle to %s: %+.4f degrees\n",xmtr.name,angle1);
+
+ if (angle1!=angle2)
+ {
+ if (angle2<0.0)
+ fprintf(fd,"Depression");
+ else
+ fprintf(fd,"Elevation");
+
+ fprintf(fd," angle to the first obstruction: %+.4f degrees\n",angle2);
+
+ }
+
+ fprintf(fd,"\n-------------------------------------------------------------------------\n\n");
+
+ if (report=='y')
+ {
+ /* Generate profile of the terrain. Create the path
+ from transmitter to receiver because that's the
+ way the original los() function did it, and going
+ the other way can yield slightly different results. */
+
+ ReadPath(xmtr,rcvr);
+ h_r=GetElevation(rcvr)+rcvr.alt+earthradius;
+ h_r_f1=h_r;
+ h_r_fpt6=h_r;
+ h_r_orig=h_r;
+ h_t=GetElevation(xmtr)+xmtr.alt+earthradius;
+ d_tx=5280.0*Distance(rcvr,xmtr);
+ cos_tx_angle=((h_r*h_r)+(d_tx*d_tx)-(h_t*h_t))/(2.0*h_r*d_tx);
+ cos_tx_angle_f1=cos_tx_angle;
+ cos_tx_angle_fpt6=cos_tx_angle;
+
+ if (f)
+ lambda=9.8425e8/(f*1e6);
+
+ /* At each point along the path calculate the cosine
+ of a sort of "inverse elevation angle" at the receiver.
+ From the antenna, 0 deg. looks at the ground, and 90 deg.
+ is parallel to the ground.
+
+ Start at the receiver. If this is the lowest antenna,
+ then terrain obstructions will be nearest to it. (Plus,
+ that's the way the original los() did it.)
+
+ Calculate cosines only. That's sufficient to compare
+ angles and it saves the extra computational burden of
+ acos(). However, note the inverted comparison: if
+ acos(A) > acos(B), then B > A. */
+
+ for (x=path.length-1; x>0; x--)
+ {
+ site_x.lat=path.lat[x];
+ site_x.lon=path.lon[x];
+ site_x.alt=0.0;
+
+ h_x=GetElevation(site_x)+earthradius;
+ d_x=5280.0*Distance(rcvr,site_x);
+
+ /* Deal with the LOS path first. */
+
+ cos_test_angle=((h_r*h_r)+(d_x*d_x)-(h_x*h_x))/(2.0*h_r*d_x);
+
+ if (cos_tx_angle>cos_test_angle)
+ {
+ if (h_r==h_r_orig)
+ fprintf(fd,"SPLAT! detected obstructions at:\n\n");
+
+ if (site_x.lat>=0.0)
+ {
+ if (metric)
+ fprintf(fd,"\t%.4f N, %.4f W, %5.2f kilometers, %6.2f meters AMSL\n",site_x.lat, site_x.lon, KM_PER_MILE*(d_x/5280.0), METERS_PER_FOOT*(h_x-earthradius));
+ else
+ fprintf(fd,"\t%.4f N, %.4f W, %5.2f miles, %6.2f feet AMSL\n",site_x.lat, site_x.lon, d_x/5280.0, h_x-earthradius);
+ }
+
+ else
+ {
+ if (metric)
+ fprintf(fd,"\t%.4f S, %.4f W, %5.2f kilometers, %6.2f meters AMSL\n",-site_x.lat, site_x.lon, KM_PER_MILE*(d_x/5280.0), METERS_PER_FOOT*(h_x-earthradius));
+ else
+
+ fprintf(fd,"\t%.4f S, %.4f W, %5.2f miles, %6.2f feet AMSL\n",-site_x.lat, site_x.lon, d_x/5280.0, h_x-earthradius);
+ }
+ }
+
+ while (cos_tx_angle>cos_test_angle)
+ {
+ h_r+=1;
+ cos_test_angle=((h_r*h_r)+(d_x*d_x)-(h_x*h_x))/(2.0*h_r*d_x);
+ cos_tx_angle=((h_r*h_r)+(d_tx*d_tx)-(h_t*h_t))/(2.0*h_r*d_tx);
+ }
+
+ if (f)
+ {
+ /* Now clear the first Fresnel zone, but don't
+ clutter the obstruction report. */
+
+ cos_tx_angle_f1=((h_r_f1*h_r_f1)+(d_tx*d_tx)-(h_t*h_t))/(2.0*h_r_f1*d_tx);
+ h_los=sqrt(h_r_f1*h_r_f1+d_x*d_x-2*h_r_f1*d_x*cos_tx_angle_f1);
+ h_f=h_los-sqrt(lambda*d_x*(d_tx-d_x)/d_tx);
+
+ while (h_f<h_x)
+ {
+ h_r_f1+=1;
+ cos_tx_angle_f1=((h_r_f1*h_r_f1)+(d_tx*d_tx)-(h_t*h_t))/(2.0*h_r_f1*d_tx);
+ h_los=sqrt(h_r_f1*h_r_f1+d_x*d_x-2*h_r_f1*d_x*cos_tx_angle_f1);
+ h_f=h_los-sqrt(lambda*d_x*(d_tx-d_x)/d_tx);
+ }
+
+ /* And clear the 60% F1 zone. */
+
+ cos_tx_angle_fpt6=((h_r_fpt6*h_r_fpt6)+(d_tx*d_tx)-(h_t*h_t))/(2.0*h_r_fpt6*d_tx);
+ h_los=sqrt(h_r_fpt6*h_r_fpt6+d_x*d_x-2*h_r_fpt6*d_x*cos_tx_angle_fpt6);
+ h_f=h_los-0.6*sqrt(lambda*d_x*(d_tx-d_x)/d_tx);
+
+ while (h_f<h_x)
+ {
+ h_r_fpt6+=1;
+ cos_tx_angle_fpt6=((h_r_fpt6*h_r_fpt6)+(d_tx*d_tx)-(h_t*h_t))/(2.0*h_r_fpt6*d_tx);
+ h_los=sqrt(h_r_fpt6*h_r_fpt6+d_x*d_x-2*h_r_fpt6*d_x*cos_tx_angle_fpt6);
+ h_f=h_los-0.6*sqrt(lambda*d_x*(d_tx-d_x)/d_tx);
+ }
+ }
+ }
+
+ if (h_r>h_r_orig)
+ {
+ if (metric)
+ sprintf(string,"\nAntenna at %s must be raised to at least %.2f meters AGL\nto clear all obstructions detected by SPLAT!\n",rcvr.name, METERS_PER_FOOT*(h_r-GetElevation(rcvr)-earthradius));
+ else
+ sprintf(string,"\nAntenna at %s must be raised to at least %.2f feet AGL\nto clear all obstructions detected by SPLAT!\n",rcvr.name, h_r-GetElevation(rcvr)-earthradius);
+ }
+
+ else
+ sprintf(string,"\nNo obstructions to LOS path due to terrain were detected by SPLAT!\n");
+
+ if (f)
+ {
+ if (h_r_fpt6>h_r_orig)
+ {
+ if (metric)
+ sprintf(string_fpt6,"\nAntenna at %s must be raised to at least %.2f meters AGL\nto clear 60%c of the first Fresnel zone.\n",rcvr.name, METERS_PER_FOOT*(h_r_fpt6-GetElevation(rcvr)-earthradius),37);
+
+ else
+ sprintf(string_fpt6,"\nAntenna at %s must be raised to at least %.2f feet AGL\nto clear 60%c of the first Fresnel zone.\n",rcvr.name, h_r_fpt6-GetElevation(rcvr)-earthradius,37);
+ }
+
+ else
+ sprintf(string_fpt6,"\n60%c of the first Fresnel zone is clear.\n",37);
+
+ if (h_r_f1>h_r_orig)
+ {
+ if (metric)
+ sprintf(string_f1,"\nAntenna at %s must be raised to at least %.2f meters AGL\nto clear the first Fresnel zone.\n",rcvr.name, METERS_PER_FOOT*(h_r_f1-GetElevation(rcvr)-earthradius));
+
+ else
+ sprintf(string_f1,"\nAntenna at %s must be raised to at least %.2f feet AGL\nto clear the first Fresnel zone.\n",rcvr.name, h_r_f1-GetElevation(rcvr)-earthradius);
+
+ }
+
+ else
+ sprintf(string_f1,"\nThe first Fresnel zone is clear.\n\n");
+ }
+ }
+
+ fprintf(fd,"%s",string);
+
+ if (f)
+ {
+ fprintf(fd,"%s",string_f1);
+ fprintf(fd,"%s",string_fpt6);
+ }
+
+ fclose(fd);
+
+ /* Display report summary on terminal */
+
+ /* Line-of-sight status */
+
+ fprintf(stdout,"%s",string);
+
+ if (f)
+ {
+ /* Fresnel zone status */
+
+ fprintf(stdout,"%s",string_f1);
+ fprintf(stdout,"%s",string_fpt6);
+ }
+
+ fprintf(stdout, "\nObstruction report written to: \"%s\"\n",report_name);
+
+ fflush(stdout);
+}
+
+void SiteReport(struct site xmtr)
+{
+ char report_name[80];
+ double terrain;
+ int x, azi;
+ FILE *fd;
+
+ sprintf(report_name,"%s-site_report.txt",xmtr.name);
+
+ for (x=0; report_name[x]!=0; x++)
+ if (report_name[x]==32 || report_name[x]==17 || report_name[x]==92 || report_name[x]==42 || report_name[x]==47)
+ report_name[x]='_';
+
+ fd=fopen(report_name,"w");
+
+ fprintf(fd,"\n\t--==[ SPLAT! v%s Site Analysis Report For: %s ]==--\n\n",splat_version,xmtr.name);
+
+ fprintf(fd,"---------------------------------------------------------------------------\n\n");
+
+ if (xmtr.lat>=0.0)
+ {
+ fprintf(fd,"Site location: %.4f North / %.4f West",xmtr.lat, xmtr.lon);
+ fprintf(fd, " (%s N / ",dec2dms(xmtr.lat));
+ }
+
+ else
+ {
+ fprintf(fd,"Site location: %.4f South / %.4f West",-xmtr.lat, xmtr.lon);
+ fprintf(fd, " (%s S / ",dec2dms(xmtr.lat));
+ }
+
+ fprintf(fd, "%s W)\n",dec2dms(xmtr.lon));
+
+ if (metric)
+ {
+ fprintf(fd,"Ground elevation: %.2f meters AMSL\n",METERS_PER_FOOT*GetElevation(xmtr));
+ fprintf(fd,"Antenna height: %.2f meters AGL / %.2f meters AMSL\n",METERS_PER_FOOT*xmtr.alt, METERS_PER_FOOT*(xmtr.alt+GetElevation(xmtr)));
+ }
+
+ else
+ {
+ fprintf(fd,"Ground elevation: %.2f feet AMSL\n",GetElevation(xmtr));
+ fprintf(fd,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",xmtr.alt, xmtr.alt+GetElevation(xmtr));
+ }
+
+ terrain=haat(xmtr);
+
+ if (terrain>-4999.0)
+ {
+ if (metric)
+ fprintf(fd,"Antenna height above average terrain: %.2f meters\n\n",METERS_PER_FOOT*terrain);
+ else
+ fprintf(fd,"Antenna height above average terrain: %.2f feet\n\n",terrain);
+
+ /* Display the average terrain between 2 and 10 miles
+ from the transmitter site at azimuths of 0, 45, 90,
+ 135, 180, 225, 270, and 315 degrees. */
+
+ for (azi=0; azi<=315; azi+=45)
+ {
+ fprintf(fd,"Average terrain at %3d degrees azimuth: ",azi);
+ terrain=AverageTerrain(xmtr,(double)azi,2.0,10.0);
+
+ if (terrain>-4999.0)
+ {
+ if (metric)
+ fprintf(fd,"%.2f meters AMSL\n",METERS_PER_FOOT*terrain);
+ else
+ fprintf(fd,"%.2f feet AMSL\n",terrain);
+ }
+
+ else
+ fprintf(fd,"No terrain\n");
+ }
+ }
+
+ fprintf(fd,"\n---------------------------------------------------------------------------\n\n");
+ fclose(fd);
+ fprintf(stdout,"\nSite analysis report written to: \"%s\"\n",report_name);
+}
+
+void LoadTopoData(int max_lon, int min_lon, int max_lat, int min_lat)
+{
+ /* This function loads the SDF files required
+ to cover the limits of the region specified. */
+
+ int x, y, width, ymin, ymax;
+
+ width=ReduceAngle(max_lon-min_lon);
+
+ if ((max_lon-min_lon)<=180.0)
+ {
+ for (y=0; y<=width; y++)
+ for (x=min_lat; x<=max_lat; x++)
+ {
+ ymin=(int)(min_lon+(double)y);
+
+ while (ymin<0)
+ ymin+=360;
+
+ while (ymin>=360)
+ ymin-=360;
+
+ ymax=ymin+1;
+
+ while (ymax<0)
+ ymax+=360;
+
+ while (ymax>=360)
+ ymax-=360;
+
+ sprintf(string,"%d:%d:%d:%d",x, x+1, ymin, ymax);
+ LoadSDF(string);
+ }
+ }
+
+ else
+ {
+ for (y=0; y<=width; y++)
+ for (x=min_lat; x<=max_lat; x++)
+ {
+ ymin=max_lon+y;
+
+ while (ymin<0)
+ ymin+=360;
+
+ while (ymin>=360)
+ ymin-=360;
+
+ ymax=ymin+1;
+
+ while (ymax<0)
+ ymax+=360;
+
+ while (ymax>=360)
+ ymax-=360;
+
+ sprintf(string,"%d:%d:%d:%d",x, x+1, ymin, ymax);
+ LoadSDF(string);
+ }
+ }
+}
+
+int LoadPLI(char *filename)
+{
+ int error=0, max_west, min_west, max_north, min_north;
+ char string[80], *pointer=NULL;
+ double latitude=0.0, longitude=0.0, azimuth=0.0, elevation=0.0,
+ loss=0.0;
+ FILE *fd;
+
+ fd=fopen(filename,"r");
- haavt=haat(rcvr);
+ if (fd!=NULL)
+ {
+ fgets(string,78,fd);
+ pointer=strchr(string,';');
- if (haavt>-4999.0)
- fprintf(fd,"Antenna height above average terrain: %.2f feet\n",haavt);
+ if (pointer!=NULL)
+ *pointer=0;
+
+ sscanf(string,"%d, %d",&max_west, &min_west);
- fprintf(fd,"Distance to %s: %.2f miles.\n",xmtr.name,Distance(xmtr,rcvr));
- fprintf(fd,"Azimuth to %s: %.2f degrees.\n",xmtr.name,Azimuth(rcvr,xmtr));
+ fgets(string,78,fd);
+ pointer=strchr(string,';');
- angle=ElevationAngle(rcvr,xmtr);
+ if (pointer!=NULL)
+ *pointer=0;
- if (angle>=0.0)
- fprintf(fd,"Angle of elevation between %s and %s: %+.4f degrees.\n",rcvr.name,xmtr.name,angle);
+ sscanf(string,"%d, %d",&max_north, &min_north);
- if (angle<0.0)
- fprintf(fd,"Angle of depression between %s and %s: %+.4f degrees.\n",rcvr.name,xmtr.name,angle);
+ fgets(string,78,fd);
+ pointer=strchr(string,';');
- fprintf(fd,"\n-------------------------------------------------------------------------\n\n");
+ if (pointer!=NULL)
+ *pointer=0;
- if (report=='y')
- {
- /* Write an Obstruction Report */
+ LoadTopoData(max_west-1, min_west, max_north-1, min_north);
- new_site=rcvr;
- result=los(xmtr,rcvr);
- result2=result;
- result2.alt-=1;
- block=result.name[0];
+ fprintf(stdout,"\nReading \"%s\"... ",filename);
+ fflush(stdout);
- if (block=='*')
- fprintf(fd,"SPLAT! detected obstructions at:\n\n");
+ fscanf(fd,"%lf, %lf, %lf, %lf, %lf",&latitude, &longitude, &azimuth, &elevation, &loss);
- while (block=='*')
+ while (feof(fd)==0)
{
- if (result.lat!=result2.lat || result.lon!=result2.lon || result.alt!=result2.alt)
- {
- if (result.lat>=0.0)
- fprintf(fd,"\t%.4f N, %.4f W, %5.2f miles, %6.2f feet AMSL.\n",result.lat, result.lon, Distance(rcvr,result), result.alt);
- else
+ if (loss>225.0)
+ loss=225.0;
- fprintf(fd,"\t%.4f S, %.4f W, %5.2f miles, %6.2f feet AMSL.\n",-result.lat, result.lon, Distance(rcvr,result), result.alt);
- }
+ if (loss<75.0)
+ loss=75.0;
- result2=result;
- new_site.alt+=1.0;
+ loss-=75.0;
+ loss/=10.0;
+ loss+=1.0;
- /* Can you hear me now? :-) */
+ if (loss<=(double)maxdB)
+ OrMask(latitude,longitude,((unsigned char)(loss))<<3);
- result=los(xmtr,new_site);
- block=result.name[0];
+ fscanf(fd,"%lf, %lf, %lf, %lf, %lf",&latitude, &longitude, &azimuth, &elevation, &loss);
}
- if (new_site.alt!=rcvr.alt)
- sprintf(string,"\nAntenna at %s must be raised to at least %.2f feet AGL\nto clear all obstructions detected by SPLAT!\n\n",rcvr.name, new_site.alt);
- else
- sprintf(string,"\nNo obstructions due to terrain were detected by SPLAT!\n\n");
- }
-
- fprintf(fd,"%s",string);
+ fclose(fd);
- fclose(fd);
+ fprintf(stdout," Done!\n");
+ fflush(stdout);
+ }
- /* Display LOS status to terminal */
+ else
+ error=1;
- fprintf(stdout,"%sObstruction report written to: \"%s\"\n",string,report_name);
- fflush(stdout);
+ return error;
}
-void SiteReport(struct site xmtr)
+void WriteKML(struct site source, struct site destination)
{
- char report_name[80];
- double terrain;
- int x, azi;
- FILE *fd;
+ int x, y;
+ char block, report_name[80];
+ double distance, rx_alt, tx_alt, cos_xmtr_angle,
+ azimuth, cos_test_angle, test_alt;
+ FILE *fd=NULL;
- sprintf(report_name,"%s-site_report.txt",xmtr.name);
+ ReadPath(source,destination);
+
+ sprintf(report_name,"%s-to-%s.kml",source.name,destination.name);
for (x=0; report_name[x]!=0; x++)
if (report_name[x]==32 || report_name[x]==17 || report_name[x]==92 || report_name[x]==42 || report_name[x]==47)
fd=fopen(report_name,"w");
- fprintf(fd,"\n\t--==[ SPLAT! v%s Site Analysis Report For: %s ]==--\n\n",splat_version,xmtr.name);
+ fprintf(fd,"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n");
+ fprintf(fd,"<kml xmlns=\"http://earth.google.com/kml/2.0\">\n");
+ fprintf(fd,"<!-- Generated by SPLAT! Version %s -->\n",splat_version);
+ fprintf(fd,"<Folder>\n");
+ fprintf(fd,"<name>SPLAT! Path</name>\n");
+ fprintf(fd,"<open>1</open>\n");
+ fprintf(fd,"<description>Path Between %s and %s</description>\n",source.name,destination.name);
- fprintf(fd,"---------------------------------------------------------------------------\n\n");
+ fprintf(fd,"<Placemark>\n");
+ fprintf(fd," <name>%s</name>\n",source.name);
+ fprintf(fd," <description>\n");
+ fprintf(fd," Transmit Site\n");
- if (xmtr.lat>=0.0)
- {
- fprintf(fd,"Site location: %.4f North / %.4f West",xmtr.lat, xmtr.lon);
- fprintf(fd, " (%s N / ",dec2dms(xmtr.lat));
- }
+ if (source.lat>=0.0)
+ fprintf(fd," <BR>%s North</BR>\n",dec2dms(source.lat));
+ else
+ fprintf(fd," <BR>%s South</BR>\n",dec2dms(source.lat));
+
+ fprintf(fd," <BR>%s West</BR>\n",dec2dms(source.lon));
+ azimuth=Azimuth(source,destination);
+ distance=Distance(source,destination);
+
+ if (metric)
+ fprintf(fd," <BR>%.2f km",distance*KM_PER_MILE);
else
- {
- fprintf(fd,"Site location: %.4f South / %.4f West",-xmtr.lat, xmtr.lon);
- fprintf(fd, " (%s S / ",dec2dms(xmtr.lat));
- }
+ fprintf(fd," <BR>%.2f miles",distance);
+
+ fprintf(fd," to %s</BR>\n <BR>toward an azimuth of %.2f%c</BR>\n",destination.name,azimuth,176);
+
+ fprintf(fd," </description>\n");
+ fprintf(fd," <visibility>1</visibility>\n");
+ fprintf(fd," <Style>\n");
+ fprintf(fd," <IconStyle>\n");
+ fprintf(fd," <Icon>\n");
+ fprintf(fd," <href>root://icons/palette-5.png</href>\n");
+ fprintf(fd," <x>224</x>\n");
+ fprintf(fd," <y>224</y>\n");
+ fprintf(fd," <w>32</w>\n");
+ fprintf(fd," <h>32</h>\n");
+ fprintf(fd," </Icon>\n");
+ fprintf(fd," </IconStyle>\n");
+ fprintf(fd," </Style>\n");
+ fprintf(fd," <Point>\n");
+ fprintf(fd," <extrude>1</extrude>\n");
+ fprintf(fd," <altitudeMode>relativeToGround</altitudeMode>\n");
+ fprintf(fd," <coordinates>%f,%f,30</coordinates>\n",(source.lon<180.0?-source.lon:360.0-source.lon),source.lat);
+ fprintf(fd," </Point>\n");
+ fprintf(fd,"</Placemark>\n");
+
+ fprintf(fd,"<Placemark>\n");
+ fprintf(fd," <name>%s</name>\n",destination.name);
+ fprintf(fd," <description>\n");
+ fprintf(fd," Receive Site\n");
- fprintf(fd, "%s W)\n",dec2dms(xmtr.lon));
- fprintf(fd,"Ground elevation: %.2f feet AMSL\n",GetElevation(xmtr));
- fprintf(fd,"Antenna height: %.2f feet AGL / %.2f feet AMSL\n",xmtr.alt, xmtr.alt+GetElevation(xmtr));
+ if (destination.lat>=0.0)
+ fprintf(fd," <BR>%s North</BR>\n",dec2dms(destination.lat));
+ else
+ fprintf(fd," <BR>%s South</BR>\n",dec2dms(destination.lat));
- terrain=haat(xmtr);
+ fprintf(fd," <BR>%s West</BR>\n",dec2dms(destination.lon));
- if (terrain>-4999.0)
+
+ if (metric)
+ fprintf(fd," <BR>%.2f km",distance*KM_PER_MILE);
+ else
+ fprintf(fd," <BR>%.2f miles",distance);
+
+ fprintf(fd," to %s</BR>\n <BR>toward an azimuth of %.2f%c</BR>\n",source.name,Azimuth(destination,source),176);
+
+ fprintf(fd," </description>\n");
+ fprintf(fd," <visibility>1</visibility>\n");
+ fprintf(fd," <Style>\n");
+ fprintf(fd," <IconStyle>\n");
+ fprintf(fd," <Icon>\n");
+ fprintf(fd," <href>root://icons/palette-5.png</href>\n");
+ fprintf(fd," <x>224</x>\n");
+ fprintf(fd," <y>224</y>\n");
+ fprintf(fd," <w>32</w>\n");
+ fprintf(fd," <h>32</h>\n");
+ fprintf(fd," </Icon>\n");
+ fprintf(fd," </IconStyle>\n");
+ fprintf(fd," </Style>\n");
+ fprintf(fd," <Point>\n");
+ fprintf(fd," <extrude>1</extrude>\n");
+ fprintf(fd," <altitudeMode>relativeToGround</altitudeMode>\n");
+ fprintf(fd," <coordinates>%f,%f,30</coordinates>\n",(destination.lon<180.0?-destination.lon:360.0-destination.lon),destination.lat);
+ fprintf(fd," </Point>\n");
+ fprintf(fd,"</Placemark>\n");
+
+ fprintf(fd,"<Placemark>\n");
+ fprintf(fd,"<name>Point-to-Point Path</name>\n");
+ fprintf(fd," <visibility>1</visibility>\n");
+ fprintf(fd," <open>0</open>\n");
+ fprintf(fd," <Style>\n");
+ fprintf(fd," <LineStyle>\n");
+ fprintf(fd," <color>7fffffff</color>\n");
+ fprintf(fd," </LineStyle>\n");
+ fprintf(fd," <PolyStyle>\n");
+ fprintf(fd," <color>7fffffff</color>\n");
+ fprintf(fd," </PolyStyle>\n");
+ fprintf(fd," </Style>\n");
+ fprintf(fd," <LineString>\n");
+ fprintf(fd," <extrude>1</extrude>\n");
+ fprintf(fd," <tessellate>1</tessellate>\n");
+ fprintf(fd," <altitudeMode>relativeToGround</altitudeMode>\n");
+ fprintf(fd," <coordinates>\n");
+
+ for (x=0; x<path.length; x++)
+ fprintf(fd," %f,%f,5\n",(path.lon[x]<180.0?-path.lon[x]:360.0-path.lon[x]),path.lat[x]);
+
+ fprintf(fd," </coordinates>\n");
+ fprintf(fd," </LineString>\n");
+ fprintf(fd,"</Placemark>\n");
+
+ fprintf(fd,"<Placemark>\n");
+ fprintf(fd,"<name>Line-of-Sight Path</name>\n");
+ fprintf(fd," <visibility>1</visibility>\n");
+ fprintf(fd," <open>0</open>\n");
+ fprintf(fd," <Style>\n");
+ fprintf(fd," <LineStyle>\n");
+ fprintf(fd," <color>ff00ff00</color>\n");
+ fprintf(fd," </LineStyle>\n");
+ fprintf(fd," <PolyStyle>\n");
+ fprintf(fd," <color>7f00ff00</color>\n");
+ fprintf(fd," </PolyStyle>\n");
+ fprintf(fd," </Style>\n");
+ fprintf(fd," <LineString>\n");
+ fprintf(fd," <extrude>1</extrude>\n");
+ fprintf(fd," <tessellate>1</tessellate>\n");
+ fprintf(fd," <altitudeMode>relativeToGround</altitudeMode>\n");
+ fprintf(fd," <coordinates>\n");
+
+ /* Walk across the "path", indentifying obstructions along the way */
+
+ for (y=0; y<path.length; y++)
{
- fprintf(fd,"Antenna height above average terrain: %.2f feet\n\n",terrain);
+ distance=5280.0*path.distance[y];
+ tx_alt=earthradius+source.alt+path.elevation[0];
+ rx_alt=earthradius+destination.alt+path.elevation[y];
- /* Display the average terrain between 2 and 10 miles
- from the transmitter site at azimuths of 0, 45, 90,
- 135, 180, 225, 270, and 315 degrees. */
+ /* Calculate the cosine of the elevation of the
+ transmitter as seen at the temp rx point. */
- for (azi=0; azi<=315; azi+=45)
+ cos_xmtr_angle=((rx_alt*rx_alt)+(distance*distance)-(tx_alt*tx_alt))/(2.0*rx_alt*distance);
+
+ for (x=y, block=0; x>=0 && block==0; x--)
{
- fprintf(fd,"Average terrain at %3d degrees azimuth: ",azi);
- terrain=AverageTerrain(xmtr,(double)azi,2.0,10.0);
+ distance=5280.0*(path.distance[y]-path.distance[x]);
+ test_alt=earthradius+path.elevation[x];
- if (terrain>-4999.0)
- fprintf(fd,"%.2f feet AMSL\n",terrain);
- else
- fprintf(fd,"No terrain\n");
+ cos_test_angle=((rx_alt*rx_alt)+(distance*distance)-(test_alt*test_alt))/(2.0*rx_alt*distance);
+
+ /* Compare these two angles to determine if
+ an obstruction exists. Since we're comparing
+ the cosines of these angles rather than
+ the angles themselves, the following "if"
+ statement is reversed from what it would
+ be if the actual angles were compared. */
+
+ if (cos_xmtr_angle>cos_test_angle)
+ block=1;
}
+
+ if (block)
+ fprintf(fd," %f,%f,-30\n",(path.lon[y]<180.0?-path.lon[y]:360.0-path.lon[y]),path.lat[y]);
+ else
+ fprintf(fd," %f,%f,5\n",(path.lon[y]<180.0?-path.lon[y]:360.0-path.lon[y]),path.lat[y]);
}
- fprintf(fd,"\n---------------------------------------------------------------------------\n\n");
+ fprintf(fd," </coordinates>\n");
+ fprintf(fd," </LineString>\n");
+ fprintf(fd,"</Placemark>\n");
+
+ fprintf(fd," <LookAt>\n");
+ fprintf(fd," <longitude>%f</longitude>\n",(source.lon<180.0?-source.lon:360.0-source.lon));
+ fprintf(fd," <latitude>%f</latitude>\n",source.lat);
+ fprintf(fd," <range>300.0</range>\n");
+ fprintf(fd," <tilt>45.0</tilt>\n");
+ fprintf(fd," <heading>%f</heading>\n",azimuth);
+ fprintf(fd," </LookAt>\n");
+
+ fprintf(fd,"</Folder>\n");
+ fprintf(fd,"</kml>\n");
+
fclose(fd);
- fprintf(stdout,"\nSite analysis report written to: \"%s\"\n",report_name);
+
+ fprintf(stdout, "KML file written to: \"%s\"\n",report_name);
+
+ fflush(stdout);
}
int main(char argc, char *argv[])
{
- int x, y, ymin, ymax, width, z=0, min_lat, min_lon,
- max_lat, max_lon, rxlat, rxlon, txlat, txlon,
- west_min, west_max, north_min, north_max;
+ int x, y, z=0, min_lat, min_lon, max_lat, max_lon,
+ rxlat, rxlon, txlat, txlon, west_min, west_max,
+ north_min, north_max;
unsigned char coverage=0, LRmap=0, ext[20], terrain_plot=0,
elevation_plot=0, height_plot=0,
longley_plot=0, cities=0, bfs=0, txsites=0,
- count, report='y';
+ count, report='y', norm=0, topomap=0, geo=0,
+ kml=0;
char mapfile[255], header[80], city_file[5][255],
elevation_file[255], height_file[255],
longley_file[255], terrain_file[255],
string[255], rxfile[255], *env=NULL,
txfile[255], map=0, boundary_file[5][255],
- rxsite=0;
+ udt_file[255], rxsite=0, plo_filename[255],
+ pli_filename[255], nf=0;
double altitude=0.0, altitudeLR=0.0, tx_range=0.0,
rx_range=0.0, deg_range=0.0, deg_limit,
- deg_range_lon, er_mult;
+ deg_range_lon, er_mult, freq=0.0;
struct site tx_site[4], rx_site;
FILE *fd;
- sprintf(header,"\n\t\t--==[ Welcome To SPLAT! v%s ]==--\n\n", splat_version);
if (argc==1)
{
- fprintf(stdout, "%sAvailable Options...\n\n\t -t txsite(s).qth (max of 4)\n\t -r rxsite.qth\n",header);
- fprintf(stdout,"\t -c plot coverage area(s) of TX(s) based on an RX antenna at X feet AGL\n");
- fprintf(stdout,"\t -L plot path loss map of TX based on an RX antenna at X feet AGL\n");
- fprintf(stdout,"\t -s filename(s) of city/site file(s) to import (max of 5)\n");
- fprintf(stdout,"\t -b filename(s) of cartographic boundary file(s) to import (max of 5)\n");
- fprintf(stdout,"\t -p filename of terrain profile graph to plot\n");
- fprintf(stdout,"\t -e filename of terrain elevation graph to plot\n");
- fprintf(stdout,"\t -h filename of terrain height graph to plot\n");
- fprintf(stdout,"\t -l filename of Longley-Rice graph to plot\n");
- fprintf(stdout,"\t -o filename of topographic map to generate (.ppm)\n");
- fprintf(stdout,"\t -d sdf file directory path (overrides path in ~/.splat_path file)\n");
- fprintf(stdout,"\t -n no analysis, brief report\n\t -N no analysis, no report\n");
- fprintf(stdout,"\t -m earth radius multiplier\n");
- fprintf(stdout,"\t -R modify default range for -c or -L (miles)\n");
- fprintf(stdout,"\t-db maximum loss contour to display on path loss maps (80-230 dB)\n\n");
-
+ fprintf(stdout,"\n\t\t --==[ SPLAT! v%s Available Options... ]==--\n\n",splat_version);
+ fprintf(stdout," -t txsite(s).qth (max of 4)\n");
+ fprintf(stdout," -r rxsite.qth\n");
+ fprintf(stdout," -c plot coverage of TX(s) with an RX antenna at X feet/meters AGL\n");
+ fprintf(stdout," -L plot path loss map of TX based on an RX at X feet/meters AGL\n");
+ fprintf(stdout," -s filename(s) of city/site file(s) to import (5 max)\n");
+ fprintf(stdout," -b filename(s) of cartographic boundary file(s) to import (max of 5)\n");
+ fprintf(stdout," -p filename of terrain profile graph to plot\n");
+ fprintf(stdout," -e filename of terrain elevation graph to plot\n");
+ fprintf(stdout," -h filename of terrain height graph to plot\n");
+ fprintf(stdout," -H filename of normalized terrain height graph to plot\n");
+ fprintf(stdout," -l filename of Longley-Rice graph to plot\n");
+ fprintf(stdout," -o filename of topographic map to generate (.ppm)\n");
+ fprintf(stdout," -u filename of user-defined terrain file to import\n");
+ fprintf(stdout," -d sdf file directory path (overrides path in ~/.splat_path file)\n");
+ fprintf(stdout," -n no analysis, brief report\n");
+ fprintf(stdout," -N no analysis, no report\n");
+ fprintf(stdout," -m earth radius multiplier\n");
+ fprintf(stdout," -f frequency for Fresnel zone calculation (MHz)\n");
+ fprintf(stdout," -R modify default range for -c or -L (miles/kilometers)\n");
+ fprintf(stdout," -db maximum loss contour to display on path loss maps (80-230 dB)\n");
+ fprintf(stdout," -nf do not plot Fresnel zones in height plots\n");
+ fprintf(stdout," -plo filename of path-loss output file\n");
+ fprintf(stdout," -pli filename of path-loss input file\n");
+ fprintf(stdout," -udt filename of user defined terrain input file\n");
+ fprintf(stdout," -geo generate an Xastir .geo georeference file (with .ppm output)\n");
+ fprintf(stdout," -kml generate a Google Earth .kml file (for point-to-point links)\n");
+ fprintf(stdout," -metric employ metric rather than imperial units for all user I/O\n\n");
+
+ fprintf(stdout,"If that flew by too fast, consider piping the output through 'less':\n");
+ fprintf(stdout,"\n\tsplat | less\n\n");
fprintf(stdout,"Type 'man splat', or see the documentation for more details.\n\n");
fflush(stdout);
return 1;
y=argc-1;
+ metric=0;
rxfile[0]=0;
txfile[0]=0;
string[0]=0;
elevation_file[0]=0;
terrain_file[0]=0;
sdf_path[0]=0;
+ udt_file[0]=0;
path.length=0;
+ LR.frq_mhz=0.0;
rx_site.lat=91.0;
rx_site.lon=361.0;
+ plo_filename[0]=0;
+ pli_filename[0]=0;
earthradius=EARTHRADIUS;
+ sprintf(header,"\n\t\t--==[ Welcome To SPLAT! v%s ]==--\n\n", splat_version);
+
for (x=0; x<4; x++)
{
tx_site[x].lat=91.0;
dem[x].max_west=-1;
}
-
/* Scan for command line arguments */
for (x=1; x<=y; x++)
map=1;
}
+ if (strcmp(argv[x],"-u")==0)
+ {
+ z=x+1;
+
+ if (z<=y && argv[z][0] && argv[z][0]!='-')
+ strncpy(udt_file,argv[z],253);
+ }
+
if (strcmp(argv[x],"-c")==0)
{
z=x+1;
}
}
- if (strcmp(argv[x],"-db")==0)
+ if (strcmp(argv[x],"-db")==0 || strcmp(argv[x],"-dB")==0)
{
z=x+1;
}
}
- if (strcmp(argv[x],"-h")==0)
+ if (strcmp(argv[x],"-h")==0 || strcmp(argv[x],"-H")==0)
{
z=x+1;
strncpy(height_file,argv[z],253);
height_plot=1;
}
+
+ if (strcmp(argv[x],"-H")==0)
+ norm=1;
+ else
+ norm=0;
}
if (strcmp(argv[x],"-n")==0)
{
- if (z<=y && argv[z][0] && argv[z][0]!='-')
- {
- report='n';
- map=1;
- }
+ report='n';
+ map=1;
}
if (strcmp(argv[x],"-N")==0)
{
- if (z<=y && argv[z][0] && argv[z][0]!='-');
- {
- report='N';
- map=1;
- }
+ report='N';
+ map=1;
}
+ if (strcmp(argv[x],"-metric")==0)
+ metric=1;
+
+ if (strcmp(argv[x],"-geo")==0)
+ geo=1;
+
+ if (strcmp(argv[x],"-kml")==0)
+ kml=1;
+
+ if (strcmp(argv[x],"-nf")==0)
+ nf=1;
+
if (strcmp(argv[x],"-d")==0)
{
z=x+1;
txsites++;
z++;
}
+
z--;
}
cities++;
z++;
}
+
z--;
}
bfs++;
z++;
}
+
z--;
}
+
+ if (strcmp(argv[x],"-f")==0)
+ {
+ z=x+1;
+
+ if (z<=y && argv[z][0] && argv[z][0]!='-')
+ {
+ sscanf(argv[z],"%lf",&freq);
+
+ if (freq<20)
+ freq=20;
+
+ if (freq>20e3)
+ freq=20e3;
+ }
+ }
+
+ if (strcmp(argv[x],"-plo")==0)
+ {
+ z=x+1;
+
+ if (z<=y && argv[z][0] && argv[z][0]!='-')
+ strncpy(plo_filename,argv[z],253);
+ }
+
+ if (strcmp(argv[x],"-pli")==0)
+ {
+ z=x+1;
+
+ if (z<=y && argv[z][0] && argv[z][0]!='-')
+ strncpy(pli_filename,argv[z],253);
+ }
}
/* Perform some error checking on the arguments
exit (-1);
}
- if ((coverage+LRmap)==0 && rx_site.lat==91.0 && rx_site.lon==361.0)
+ if ((coverage+LRmap+pli_filename[0])==0 && rx_site.lat==91.0 && rx_site.lon==361.0)
{
- fprintf(stderr,"\n%c*** ERROR: No receiver site found or specified!\n\n",7);
- exit (-1);
+ if (max_range!=0.0 && txsites!=0)
+ {
+ /* Plot topographic map of radius "max_range" */
+
+ map=0;
+ topomap=1;
+ report='N';
+ }
+
+ else
+ {
+ fprintf(stderr,"\n%c*** ERROR: No receiver site found or specified!\n\n",7);
+ exit (-1);
+ }
}
- /* No errors were detected. Whew! :-) */
+ /* No major errors were detected. Whew! :-) */
+
+ /* Adjust input parameters if -metric option is used */
+
+ if (metric)
+ {
+ altitudeLR/=METERS_PER_FOOT; /* meters --> feet */
+ max_range/=KM_PER_MILE; /* kilometers --> miles */
+ altitude/=METERS_PER_FOOT; /* meters --> feet */
+ }
/* If no SDF path was specified on the command line (-d), check
for a path specified in the $HOME/.splat_path file. If the
fprintf(stdout,"%s",header);
fflush(stdout);
+ if (pli_filename[0])
+ {
+ y=LoadPLI(pli_filename);
+
+ for (x=0; x<txsites; x++)
+ PlaceMarker(tx_site[x]);
+
+ if (rxsite)
+ PlaceMarker(rx_site);
+
+ if (bfs)
+ {
+ for (x=0; x<bfs; x++)
+ LoadBoundaries(boundary_file[x]);
+ }
+
+ if (cities)
+ {
+ for (x=0; x<cities; x++)
+ LoadCities(city_file[x]);
+ }
+
+ WritePPMLR(mapfile,geo);
+
+ exit(0);
+ }
+
x=0;
y=0;
max_lon=rxlon;
}
-
/* Load the required SDF files */
- width=ReduceAngle(max_lon-min_lon);
-
- if ((max_lon-min_lon)<=180.0)
- {
- for (y=0; y<=width; y++)
- for (x=min_lat; x<=max_lat; x++)
- {
- ymin=(int)(min_lon+(double)y);
-
- while (ymin<0)
- ymin+=360;
-
- while (ymin>=360)
- ymin-=360;
-
- ymax=ymin+1;
-
- while (ymax<0)
- ymax+=360;
-
- while (ymax>=360)
- ymax-=360;
-
- sprintf(string,"%d:%d:%d:%d",x, x+1, ymin, ymax);
- LoadSDF(string);
- }
- }
-
- else
- {
- for (y=0; y<=width; y++)
- for (x=min_lat; x<=max_lat; x++)
- {
- ymin=max_lon+y;
-
- while (ymin<0)
- ymin+=360;
-
- while (ymin>=360)
- ymin-=360;
-
- ymax=ymin+1;
-
- while (ymax<0)
- ymax+=360;
-
- while (ymax>=360)
- ymax-=360;
-
- sprintf(string,"%d:%d:%d:%d",x, x+1, ymin, ymax);
- LoadSDF(string);
- }
- }
+ LoadTopoData(max_lon, min_lon, max_lat, min_lat);
- if (coverage | LRmap)
+ if (coverage | LRmap | topomap)
{
if (LRmap)
txsites=1;
max_lon=west_max;
}
+ /* Load any additional SDF files, if required */
- /* Load the required SDF files */
-
- width=ReduceAngle(max_lon-min_lon);
-
- if ((max_lon-min_lon)<=180.0)
- {
- for (y=0; y<=width; y++)
- for (x=min_lat; x<=max_lat; x++)
- {
- ymin=(int)(min_lon+(double)y);
-
- while (ymin<0)
- ymin+=360;
-
- while (ymin>=360)
- ymin-=360;
-
- ymax=ymin+1;
-
- while (ymax<0)
- ymax+=360;
-
- while (ymax>=360)
- ymax-=360;
-
- sprintf(string,"%d:%d:%d:%d",x, x+1, ymin, ymax);
- LoadSDF(string);
- }
- }
-
- else
- {
- for (y=0; y<=width; y++)
- for (x=min_lat; x<=max_lat; x++)
- {
- ymin=(int)(max_lon+(double)y);
-
- while (ymin<0)
- ymin+=360;
-
- while (ymin>=360)
- ymin-=360;
-
- ymax=ymin+1;
-
- while (ymax<0)
- ymax+=360;
-
- while (ymax>=360)
- ymax-=360;
-
- sprintf(string,"%d:%d:%d:%d",x, x+1, ymin, ymax);
- LoadSDF(string);
- }
- }
+ LoadTopoData(max_lon, min_lon, max_lat, min_lat);
}
+ if (udt_file[0])
+ LoadUDT(udt_file);
- if (mapfile[0])
+ if (mapfile[0] && topomap==0)
map=1;
+ if (freq==0.0 && nf==0)
+ freq=LR.frq_mhz;
+ else
+ freq=0.0;
+
if (coverage | LRmap)
{
for (x=0; x<txsites; x++)
PlotCoverage(tx_site[x],altitude);
if (LRmap)
- PlotLRMap(tx_site[x],altitudeLR);
+ PlotLRMap(tx_site[x],altitudeLR,plo_filename);
PlaceMarker(tx_site[x]);
}
if (report!='N')
- ObstructionReport(tx_site[x],rx_site,report);
+ ObstructionReport(tx_site[x],rx_site,report,freq);
+
+ if (kml)
+ WriteKML(tx_site[x],rx_site);
}
}
- if (map)
+ if (map | topomap)
{
if (bfs)
{
for (x=0; x<cities; x++)
LoadCities(city_file[x]);
}
-
- if (!LRmap)
- WritePPM(mapfile);
+
+ if (LRmap)
+ WritePPMLR(mapfile,geo);
else
- WritePPMLR(mapfile);
+ WritePPM(mapfile,geo);
}
if (terrain_plot)
for (count=0; count<txsites; count++)
{
sprintf(string,"%s-%c%s%c",height_file,'1'+count,ext,0);
- GraphHeight(tx_site[count],rx_site,string);
+ GraphHeight(tx_site[count],rx_site,string,freq,norm);
}
}
else
- GraphHeight(tx_site[0],rx_site,height_file);
+ GraphHeight(tx_site[0],rx_site,height_file,freq,norm);
}
-
+
if (longley_plot)
{
if (txsites>1)
projects / debian / splat / blobdiff