kopia lustrzana https://github.com/projecthorus/radiosonde_auto_rx
More documentation, auto download of almanac.
Mark Jessop
rodzic
aaa2d06fb4
commit
271d5f5ac4
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@ -11,6 +11,23 @@
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# The following other packages are needed:
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# rtl-sdr (for the rtl_power and rtl_fm utilities)
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# sox
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#
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# Instructions:
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# Modify config parameters below as required. Take note of the APRS_USER and APRS_PASS values.
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# Run with: python auto_rx.py
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# A log file will be written to log/<timestamp>.log
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#
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#
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# TODO:
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# [ ] Better handling of errors from the decoder sub-process.
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# [ ] Handle no lat/long better.
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# [ ] Option to filter by DOP data
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# [ ] Automatic downloading of ephemeris data, instead of almanac.
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# [ ] Better peak signal detection.
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# [ ] Habitat upload.
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# [ ] Move configuration parameters to a separate file.
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# [ ] Build file.
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# [ ] RS41 support.
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@ -38,10 +55,10 @@ MIN_FREQ = 400.4e6 # Search start frequency (Hz)
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MAX_FREQ = 403.5e6 # Search stop frequency (Hz)
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SEARCH_STEP = 800 # Search step (Hz)
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FREQ_QUANTIZATION = 5000 # Quantize search results to 5 kHz steps.
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MIN_FREQ_DISTANCE = 1000 # Expect a minimum distance of 10 kHz between sondes.
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MIN_FREQ_DISTANCE = 1000 # Minimum distance between peaks.
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MIN_SNR = 10 # Only takes peaks that are a minimum of 10dB above the noise floor.
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SEARCH_ATTEMPTS = 5 # Number of attempts to search before giving up
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SEARCH_DELAY = 300 # Delay between search attempts (seconds)
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SEARCH_DELAY = 120 # Delay between search attempts (seconds)
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# Other Receiver Parameters
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MAX_RX_TIME = 3*60*60
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@ -49,14 +66,14 @@ MAX_RX_TIME = 3*60*60
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# APRS Output
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APRS_OUTPUT_ENABLED = True
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APRS_UPDATE_RATE = 30
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APRS_USER = "N0CALL"
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APRS_PASS = "000000"
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APRS_USER = "N0CALL" # Replace with your callsign
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APRS_PASS = "000000" # Replace with your APRS-IS passcode
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aprs_queue = Queue.Queue(1)
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def run_rtl_power(start, stop, step, filename="log_power.csv", dwell = 20):
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# Run rtl_power, with a timeout
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""" Run rtl_power, with a timeout"""
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# rtl_power -f 400400000:403500000:800 -i20 -1 log_power.csv
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rtl_power_cmd = "timeout %d rtl_power -f %d:%d:%d -i %d -1 %s" % (dwell+10, start, stop, step, dwell, filename)
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logging.info("Running frequency scan.")
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@ -68,7 +85,7 @@ def run_rtl_power(start, stop, step, filename="log_power.csv", dwell = 20):
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return True
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def read_rtl_power(filename):
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''' Read in frequency samples from a single-shot log file produced by rtl_power'''
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""" Read in frequency samples from a single-shot log file produced by rtl_power """
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# Output buffers.
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freq = np.array([])
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@ -108,7 +125,9 @@ def read_rtl_power(filename):
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f.close()
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return (freq, power, freq_step)
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def quantize_freq(freq_list, quantize=5000):
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""" Quantise a list of frequencies to steps of <quantize> Hz """
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return np.round(freq_list/quantize)*quantize
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def detect_sonde(frequency):
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@ -132,22 +151,8 @@ def detect_sonde(frequency):
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return None
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# $rs = "";
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# $WFM = "";
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# if (abs($ret) == 2) { $rs = "dfm"; $breite = "15k"; $dec = './dfm06 -vv --ecc'; $filter = "lowpass 2000 highpass 20"; }
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# if (abs($ret) == 3) { $rs = "rs41"; $breite = "12k"; $dec = './rs41ecc --ecc -v'; $filter = "lowpass 2600"; }
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# if (abs($ret) == 4) { $rs = "rs92"; $breite = "12k"; $dec = './rs92gps --vel2 -a almanac.txt'; $filter = "lowpass 2500 highpass 20"; }
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# if (abs($ret) == 5) { $rs = "m10"; $breite = "24k"; $dec = './m10x -vv'; $filter = "highpass 20"; }
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# if (abs($ret) == 6) { $rs = "imet"; $breite = "40k"; $dec = './imet1ab -v'; $filter = "highpass 20"; $WFM = "-o 4"; }
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# if ($inv) { print "-";} print uc($rs)," ($utc)\n";
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# $utc = strftime('%Y%m%d_%H%M%S', gmtime);
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# $wavfile = $rs."-".$utc."Z-".$freq."Hz.wav";
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# if ($rs) {
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# system("timeout 30s rtl_fm -p $ppm -M fm $WFM -s $breite -f $freq 2>/dev/null |\
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# sox -t raw -r $breite -e s -b 16 -c 1 - -r 48000 -b 8 -t wav - $filter 2>/dev/null |\
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# tee $log_dir/$wavfile | $dec $inv 2>/dev/null");
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def process_rs92_line(line):
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""" Process a line of output from the rs92gps decoder, converting it to a dict """
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try:
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params = line.split(',')
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@ -209,6 +214,7 @@ def decode_rs92(frequency, ppm=RX_PPM, rx_queue=None):
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def internet_push_thread():
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""" Push a frame of sonde data into various internet services (APRS-IS, Habitat) """
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global aprs_queue, APRS_USER, APRS_PASS, APRS_UPDATE_RATE, APRS_OUTPUT_ENABLED
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print("Started thread.")
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while APRS_OUTPUT_ENABLED:
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@ -260,9 +266,9 @@ if __name__ == "__main__":
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# Quantize to nearest 5 kHz
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peak_frequencies = quantize_freq(peak_frequencies, FREQ_QUANTIZATION)
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logging.info("Peaks found at (MHz): %s" % str(peak_frequencies/1e6))
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# Run rs_detect on each peak frequency, to determine if there is a sonde there.
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for freq in peak_frequencies:
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detected = detect_sonde(freq)
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if detected != None:
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@ -271,8 +277,10 @@ if __name__ == "__main__":
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break
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if sonde_type != None:
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# Found a sonde! Break out of the while loop and attempt to decode it.
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break
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else:
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# No sondes found :-( Wait and try again.
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SEARCH_ATTEMPTS -= 1
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logging.warning("Search attempt failed, %d attempts remaining. Waiting %d seconds." % (SEARCH_ATTEMPTS, SEARCH_DELAY))
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time.sleep(SEARCH_DELAY)
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@ -283,9 +291,11 @@ if __name__ == "__main__":
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logging.info("Starting decoding of %s on %.3f MHz" % (sonde_type, sonde_freq/1e6))
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# Start a thread to push data to the web.
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t = Thread(target=internet_push_thread)
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t.start()
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# Start decoding the sonde!
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if sonde_type == "RS92":
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decode_rs92(sonde_freq, rx_queue=aprs_queue)
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elif sonde_type == "RS41":
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@ -293,6 +303,7 @@ if __name__ == "__main__":
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else:
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pass
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# Stop the APRS output thread.
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APRS_OUTPUT_ENABLED = False
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@ -1,8 +1,24 @@
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#!/bin/bash
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# Radiosonde Auto-RX Script
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#
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# 2017-04 Mark Jessop <vk5qi@rfhead.net>
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#
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# NOTE: If running this from crontab, make sure to set the appropriate PATH env-vars,
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# else utilities like rtl_power and rtl_fm won't be found.
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#
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# change into appropriate directory
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cd ~/RS/auto_rx/
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# Clean up old files
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rm log_power.csv
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rm almanac.txt
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# Download latest almanac
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wget -O almanac.txt "https://www.navcen.uscg.gov/?pageName=currentAlmanac&format=sem"
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# Start auto_rx process with a 3 hour timeout.
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timeout 10800 python auto_rx.py
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timeout 10800 python auto_rx.py 2>error.log
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# Clean up rtl_fm process.
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killall rtl_fm
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