Usage: simple_ra      with zero or more of the following options:

--ant <antenna>    Set antenna to <antenna>.  Eg.  RX2, TX/RX.
                   Default: hardware default
                   
--srate <rate>     Set sample rate to <rate>. Eg. 2.0e6, 1.25e6.
                   Default: 2000000.0
                   
--subdev <subdev>  Set subdevice to <subdev>.  Eg: A:0, B:A, etc
                   Default: A:0
                   
--devid <dev>      Set device id to <dev>.  Eg: 'type=usrp1' etc
                   Default: type=usrp1
                   
--longitude <long> Set longitude  to <long> or LMST calcs.  Eg:  37.55
                   Default: -76.02

--fftsize <size>   Set recorded FFT size to <size>.  Eg: 4096
                   Set to power of 2 for best performance
                   Default: 8192

--freq <freq>      Set tuned frequency to <freq>. Eg: 1420.406e6
                   Default: 1420406000.0
                   
--gain <gain>      Set RF gain to <gain> Eg: 30.0
                   Default: 25.5
                   
--dbw <detbw>      Set detector bandwidth to <detbw>
                   Default: 1000000.0
                   
--lrate <rate>     Set logging interval to <rate>
                   Default: 5

--ppm <ppm>        Set frequency accuracy estimate to <ppm>-

--title <title>    Set window title to <title>

--fifo  <filename> High-rate detector output FIFO (for pulsars, etc)