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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.