Sylphase SDGPS
The softwaredefined GPS(/GNSS) toolkit

Type signature: (raw>[raw])
Example output of plotraw node (Infix2, with antenna plugged in and viewing sky) 
Usage:
plotraw [OPTION]...
Allowed options:
Option  Description 

help  produce help message 
gnssstream arg (=0)  GNSS stream to use 
duration DURATION (=0.01)  length of data to plot (units: seconds) 
period PERIOD (=0.1)  offset between subsequent plots (units: seconds) 
offset OFFSET (=0)  offset into each period of data to plot (units: seconds) 
scalex SCALE_X (=1)  scale X coordinates by this number 
wait  wait for each plot to be acknowledged 
psd  plot power spectral density (default if no other plots are specified) 
annotatespurs  measure top 5 spurs and list in PSD plot annotation (enabled by default if no plots are explicitly specified) 
time  plot timedomain signal 
timemaxsamples arg (=1024)  limit maximum number of samples displayed in timedomain plot 
psdbins arg (=4096)  number of frequency bins for PSD 
psdshowdc  show DC bias spike in PSD (default: remove mean from samples before computing periodogram) 
histogram  also plot histogram of sample values 
histogram2  also plot full histogram of all (I, Q) pairs 
tone arg  plot the magnitude and phase of a tone that is at this baseband frequency (units: Hertz) 
statlogpsdpeak FREQUENCY  log power of max PSD point within 0.1 MHz of FREQUENCY (units: Hertz) 
statlogtotalpower  log total power 