a set of script to predict passes and make automated recordings of satellites. Intended to be run headless on an SoC.
Original forked from https://github.com/va7eex/Pi_WXRX
Improvements made for https://keet.space
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111 lines
3.6 KiB
111 lines
3.6 KiB
import array
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import json
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import sys
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import time
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import datetime
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ppmshift = '1' #adjust this if you don't have a TCXO equipped RTLSDR
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name = sys.argv[1].upper() #what satellite we're using
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input_sample_rate = '48000' #actually the bandwidth of the audio sample we're taking from the RTLSDR
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output_sample_rate = '11025' #what we downconvert to to play nicely with wxtoimg
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gain = '40' #software gain
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gain_lower_pass = gain #we can add more or less gain if a satellite is at a lower elevation, currently disabled
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gain_lower_pass_requirement = 40
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data = json.load(open('satpredict.txt'))
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af_folder = '/tmp/'
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output_folder = '~/sat_output/'
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#this line is depreciated, make it a zero element array to do rtl_power surveys of the downline band
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wxtoimg_options = ['HVCT', 'MCIR', 'NO']
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#set options for various to-bash lines
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#I don't recommend touching any of these
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rtl_fm_options = { '-f':data[name]['frequency'],
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'-M':'fm',
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'-p':ppmshift,
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'-F':'9',
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'-s':input_sample_rate,
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'-g':gain,
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'-E': 'dc',
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'-A': 'fast' }
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rtl_power_options = { '-f':'136.9M:138.1M:4k',
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'-g':gain,
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'-i':'1s',
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'-e':str(data[name]['duration_seconds']) + 's',
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'-p':ppmshift,
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'-c':'0.2' }
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#I REALLY don't recommend touching these, stuff breaks without it and I can't explain why
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sox_options = [ '-b16',
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'-c1',
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'-V1',
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'-es',
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'-r ' + input_sample_rate,
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'-t raw' ]
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#depreciated
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def filename(satname, part):
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if(part != ''):
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return satname + '_' + part + '.wav'
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return satname + '.wav'
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def datestamp( unixtime ):
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return datetime.datetime.fromtimestamp(
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int(unixtime)
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).strftime('%Y%m%d-%H%M_')
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def convert_time( unixtime ):
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return datetime.datetime.fromtimestamp(
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int(unixtime)
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).strftime('%H:%M %Y-%m-%d')
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#gain adjustment based on pass elevationg
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if( data[name]['elevation'] < gain_lower_pass_requirement ):
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gain = gain_lower_pass
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#a bash line
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timeoutstr = 'timeout ' + str(data[name]['duration_seconds'])
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#a filename
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filename = datestamp(data[name]['start_unix']) + name + '_' + str(int(data[name]['elevation']))
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#I may or may not have forgotten to specify you need the heatmap.py from the rtl_power page on keenerd.
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if( len(wxtoimg_options) == 0 ):
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rtlpower = 'rtl_power -f 137M:138M:4k -g ' + gain + ' -i 1s -e ' + str(data[name]['duration_seconds']) + 's -p ' + ppmshift + ' -c 0.2 ' + output_folder + filename + '.csv'
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heatmap = 'python heatmap.py ' + output_folder + name + '_' + str(int(data[name]['elevation'])) + '_' + timestamp + '.csv ' + output_folder + name + '_' + data[name]['direction'] + str(int(data[name]['elevation'])) + '_' + timestamp + '.png'
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print timeoutstr, rtlpower
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print heatmap
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print 'bash ftp.sh ' + output_folder + name + '_' + str(int(data[name]['elevation'])) + '_' + timestamp + '.png'
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else:
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timeoutstr = 'timeout ' + str(data[name]['duration_seconds'])
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rtlstr = 'rtl_fm'
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for k, v in rtl_fm_options.iteritems():
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rtlstr = rtlstr + ' ' + k + ' ' + v
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soxstr = 'sox'
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for v in sox_options:
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soxstr = soxstr + ' ' + v
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print timeoutstr, rtlstr, af_folder + filename + '.raw'
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print soxstr, af_folder + filename + '.raw', af_folder + filename + '.wav', 'rate 11025'
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print 'touch -r', af_folder + filename + '.raw', af_folder + filename + '.wav'
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print 'bash', 'render.sh', af_folder + filename + '.wav'
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f = open(name + '_sched.txt', 'w')
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f.write(convert_time(data[name]['start_unix']))
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#Depreciated, use render.sh
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#for opt in wxtoimg_options:
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# filename = datestamp(data[name]['start_unix']) + name + '_' + str(int(data[name]['elevation']))
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#
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# print 'wxtoimg' + ' -e', opt, af_folder + filename + '.wav', output_folder + filename + '_' + opt + '.png'
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#
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# print 'bash ftp.sh', output_folder + filename + '_' + opt + '.png'
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