- 35, 33 ; max_north, min_north
- 34.2265434, 118.0631104, 48.171, -37.461, 67.70
- 34.2270355, 118.0624390, 48.262, -26.212, 73.72
- 34.2280197, 118.0611038, 48.269, -14.951, 79.74
- 34.2285156, 118.0604401, 48.207, -11.351, 81.68
- 34.2290077, 118.0597687, 48.240, -10.518, 83.26
- 34.2294998, 118.0591049, 48.225, 23.201, 84.60
- 34.2304878, 118.0577698, 48.213, 15.769, 137.84
- 34.2309799, 118.0570984, 48.234, 15.965, 151.54
- 34.2314720, 118.0564346, 48.224, 16.520, 149.45
- 34.2319679, 118.0557632, 48.223, 15.588, 151.61
- 34.2329521, 118.0544281, 48.230, 13.889, 135.45
- 34.2334442, 118.0537643, 48.223, 11.693, 137.37
- 34.2339401, 118.0530930, 48.222, 14.050, 126.32
- 34.2344322, 118.0524292, 48.216, 16.274, 156.28
- 34.2354164, 118.0510941, 48.222, 15.058, 152.65
- 34.2359123, 118.0504227, 48.221, 16.215, 158.57
- 34.2364044, 118.0497589, 48.216, 15.024, 157.30
- 34.2368965, 118.0490875, 48.225, 17.184, 156.36
-
- It is not uncommon for S\bSP\bPL\bLA\bAT\bT!\b! path loss files to contain
- as many as 3 million or more lines of data. Comments can
- be placed in the file if they are proceeded by a semicolon
- character. The v\bvi\bim\bm text editor has proven capable of
- editing files of this size.
-
- Note as was the case in the antenna pattern files, nega-
- tive elevation angles refer to upward tilt (above the
- horizon), while positive angles refer to downward tilt
- (below the horizon). These angles refer to the elevation
- to the receiving antenna at the height above ground level
- specified using the _\b-_\bL switch _\bi_\bf the path between trans-
- mitter and receiver is unobstructed. If the path between
- the transmitter and receiver is obstructed, then the ele-
- vation angle to the first obstruction is returned by
- S\bSP\bPL\bLA\bAT\bT!\b!. This is because the Longley-Rice model considers
- the energy reaching a distant point over an obstructed
- path as a derivative of the energy scattered from the top
- of the first obstruction, only. Since energy cannot reach
- the obstructed location directly, the actual elevation
- angle to that point is irrelevant.
-
- When modifying S\bSP\bPL\bLA\bAT\bT!\b! path loss files to reflect antenna
- pattern data, _\bo_\bn_\bl_\by _\bt_\bh_\be _\bl_\ba_\bs_\bt _\bc_\bo_\bl_\bu_\bm_\bn _\b(_\bp_\ba_\bt_\bh _\bl_\bo_\bs_\bs_\b) should be
- amended to reflect the antenna's normalized gain at the
- azimuth and elevation angles specified in the file. (At
- this time, programs and scripts capable of performing this
- operation are left as an exercise for the user.)
-
- Modified path loss maps can be imported back into S\bSP\bPL\bLA\bAT\bT!\b!
- for generating revised coverage maps:
-
- splat -t kvea -pli pathloss.dat -s city.dat -b county.dat
- -o map.ppm
-
- S\bSP\bPL\bLA\bAT\bT!\b! path loss files can also be used for conducting
- coverage or interference studies outside of S\bSP\bPL\bLA\bAT\bT!\b!.
+ 35, 34 ; max_north, min_north
+ 34.2265424, 118.0631096, 48.199, -32.747, 67.70
+ 34.2270358, 118.0624421, 48.199, -19.161, 73.72
+ 34.2275292, 118.0617747, 48.199, -13.714, 77.24
+ 34.2280226, 118.0611072, 48.199, -10.508, 79.74
+ 34.2290094, 118.0597723, 48.199, -11.806, 83.26 *
+ 34.2295028, 118.0591048, 48.199, -11.806, 135.47 *
+ 34.2299962, 118.0584373, 48.199, -15.358, 137.06 *
+ 34.2304896, 118.0577698, 48.199, -15.358, 149.87 *
+ 34.2314763, 118.0564348, 48.199, -15.358, 154.16 *
+ 34.2319697, 118.0557673, 48.199, -11.806, 153.42 *
+ 34.2324631, 118.0550997, 48.199, -11.806, 137.63 *
+ 34.2329564, 118.0544322, 48.199, -11.806, 139.23 *
+ 34.2339432, 118.0530971, 48.199, -11.806, 139.75 *
+ 34.2344365, 118.0524295, 48.199, -11.806, 151.01 *
+ 34.2349299, 118.0517620, 48.199, -11.806, 147.71 *
+ 34.2354232, 118.0510944, 48.199, -15.358, 159.49 *
+ 34.2364099, 118.0497592, 48.199, -15.358, 151.67 *
+
+ Comments can be placed in the file if they are proceeded by a semicolon
+ character. The v\bvi\bim\bm text editor has proven capable of editing files of
+ this size.
+
+ Note as was the case in the antenna pattern files, negative elevation
+ angles refer to upward tilt (above the horizon), while positive angles
+ refer to downward tilt (below the horizon). These angles refer to the
+ elevation to the receiving antenna at the height above ground level
+ specified using the _\b-_\bL switch _\bi_\bf the path between transmitter and
+ receiver is unobstructed. If the path between the transmitter and
+ receiver is obstructed, an asterisk (*) is placed on the end of the
+ line, and the elevation angle returned by S\bSP\bPL\bLA\bAT\bT!\b! refers the elevation
+ angle to the first obstruction rather than the geographic location
+ specified on the line. This is done in response to the fact that the
+ Longley-Rice model considers the energy reaching a distant point over
+ an obstructed path to be the result of the energy scattered over the
+ top of the first obstruction along the path. Since energy cannot reach
+ the obstructed location directly, the actual elevation angle to the
+ destination over such a path becomes irrelevant.
+
+ When modifying S\bSP\bPL\bLA\bAT\bT!\b! path loss files to reflect antenna pattern data,
+ _\bo_\bn_\bl_\by _\bt_\bh_\be _\bl_\ba_\bs_\bt _\bn_\bu_\bm_\be_\br_\bi_\bc _\bc_\bo_\bl_\bu_\bm_\bn should be amended to reflect the antenna's
+ normalized gain at the azimuth and elevation angles specified in the
+ file. Programs and scripts capable of performing this task are left as
+ an exercise for the user.
+
+ Modified alphanumeric output files can be imported back into S\bSP\bPL\bLA\bAT\bT!\b!
+ for generating revised coverage maps provided that the ERP and -dBm
+ options are used as they were when the alphanumeric output file was
+ originally generated:
+
+ splat -t kvea -ani pathloss.dat -s city.dat -b county.dat -o map.ppm
+
+ Note that alphanumeric output files generated by splat cannot be used
+ with splat-hd, or vice-versa due to the resolution incompatibility
+ between the two versions of the program. Also, each of the three types
+ of alphanumeric output files are incompatible with one another, so a
+ file containing path loss data cannot be imported into S\bSP\bPL\bLA\bAT\bT!\b! to pro-
+ duce signal strength or received power level contours, etc.