--- /dev/null
+This program is used to take spectra and total power measurements.
+ It records spectral and total-power data to external datalogging
+ files.
+
+The program takes the following options:
+
+ --rx-subdev-spec which USRP Rx side? A or B
+
+ --decim USRP decimation rate: 8, 16, 32, and 64 are good
+ (8Mhz, 4Mhz, 2Mhz, and 1Mhz bandwidth)
+
+ --freq USRP daughtercard frequency
+
+ --observing Actual observing frequency (default is to use the
+ setting for --freq)
+
+ --avg Averaging setting for spectral display--higher numbers
+ equal more averaging. 25 to 40 is typical.
+
+ --integ Total power integration time: seconds
+
+ --gain USRP daughtercard gain control
+
+ --reflevel Reference level on pulse profile display
+
+ --longitude Observer longitude: West is negative
+
+ --latitude Observer latitude: South is negative
+
+ --fft_size Size of FFT for post-detector spectrum: default is 1024
+
+ --prefix Filename prefix to use for data logging files
+ Default is ./
+
+ --divbase The base of the Y/Div menu in pulsar display
+
+ --division The initial Y/Div in pulsar display
+
+ --ylabel Y axis label
+
+ --cfunc The function name prefix for the spectral and
+ calibrator functions
+
+ --waterfall Use waterfall, rather than regular spectral display
+ NOT TESTED IN THIS APPLICATION
+
+ --stripsize Size of the total-power stripchart, in samples
+
+There are two windows--a spectral window, and the total-power window.
+ Moving the cursor around in the spectral window shows you the
+ corresponding frequency and doppler shift. Left clicking in this
+ window sets an interference marker, which sets a "zero" in the
+ interference filter. Use the "clear interference" button to clear this.
+
+The total power window is updated at a fixed 2Hz rate, and grows from
+ the left of the display.
+
+If latitude and longitude are set correctly, and system time is correct,
+ then the current LMST is displayed, updated once per second.
+
+Averaging parameters, gain, and frequency can all be set from the GUI using
+ the appropriate controls. You can also enter the current declination, which
+ will appear in the datalogging files. This is useful both for mapping,
+ and housekeeping purposes, particularly when you haven't looked at a datafile
+ for quite some time.
+
+There are two datalog files produced by this program:
+
+ YYYYMMDDHH.tpdat Total power data
+
+ The date/time portion of the filename is referred to local time,
+ rather than UTC or sidereal.
+
+ First field is sidereal time when sample was taken
+ Second field is total power datum
+ Third field is declination in decimal degrees
+
+ Samples are written once per second
+
+ YYYYMMDDHH.sdat Spectral data
+
+ The date/time portion of the filename is referred to local time,
+ rather than UTC or sidereal.
+
+ First field is sidereal time when spectrum was taken
+ Second field is declination in decimal degrees
+ Third field is complex spectral data--in the same order that FFTW3 library
+ places bins: DC to bandwidth/2, followed by -bandwidth/2 to DC.
+
+ Spectral snapshots are written once every 5 seconds