X-Git-Url: https://git.gag.com/?a=blobdiff_plain;f=gr-noaa%2FREADME;fp=gr-noaa%2FREADME;h=f00d2d28deec0c0bf9b227aeee90a6d509417a8c;hb=35e43e8d8c271e6842191cac3fc3f2f88a861183;hp=0000000000000000000000000000000000000000;hpb=ea29b08aeb54227e6628f655ccfdb96fe4d8c378;p=debian%2Fgnuradio

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+This component implements an NOAA POES HRPT receiver.  After installation,
+the scripts described below will be install in the users PATH.
+
+As the scripts are generated using GRC, GRC must be installed at runtime
+in order for them to operate.
+
+
+HRPT OPERATION
+
+usrp_rx_hrpt.py
+---------------
+
+This GUI script will receive HRPT RF, demodulate, synchronize, and deframe
+HRPT minor frames into a file.  The file stores a series of 11090 word,
+16-bits per word corresponding to the HRPT minor frame format (only the
+lower 10-bits per word are significant.)
+
+The script file by default uses USRP side A, 1698 MHz, at decimation 16. The
+gnuradio configuration file ~/.gnuradio/config.conf, section 'usrp_rx_hrpt.cfg',
+will allow changing this, as well as implementing persistent storage of GUI
+entered parameters from invocation to invocation.
+
+The present HRPT demodulator is only tested at decimation 16.  The only other
+valid decimation rates are 24 and 32, which may work but with more bit
+errors.  No other decimation rates will work.
+
+
+file_rx_hrpt.py
+---------------
+
+This GUI script operates like usrp_rx_hrpt.py, but reads from a pre-captured
+data file supplied by -F on the command line.
+
+
+usrp_rx_hrpt_nogui.py
+---------------------
+
+This non-GUI script operates without a display and requires that all parameters
+be set in the configuration file prior to running.  It has no command-line
+parameters, and works identically to the GUI scripts.
+
+
+hrpt_demod_file.py
+------------------
+
+This non-GUI script will operate on a file generated with
+usrp_rx_cfile.py and output frames in the same format as above.  It does
+*not* use the configuration file above; instead you must pass parameters to
+it on the command line.  To exit the program, press Enter.
+
+Usage: demod_hrpt_file.py: [options]
+
+Options:
+  -h, --help            show this help message and exit
+  -d DECIM, --decim=DECIM
+                        Set Decimation [default=16]
+  -p PLL_ALPHA, --pll-alpha=PLL_ALPHA
+                        Set pll_alpha [default=50m]
+  -s CLOCK_ALPHA, --clock-alpha=CLOCK_ALPHA
+                        Set clock_alpha [default=50m]
+  -F INPUT_FILENAME, --input-filename=INPUT_FILENAME
+                        Set Filename [default=usrp.dat]
+  -o OUTPUT_FILENAME, --output-filename=OUTPUT_FILENAME
+                        Set Output [default=frames.dat]
+
+
+LRIT Operation
+--------------
+
+The work-in-progress LRIT GRC script is not currently in a usable state.