CW Matched Filter satnogs_cw_matched_filter_ff satnogs import satnogs satnogs.cw_matched_filter_ff($sampling_rate, $carrier_freq, $wpm, $energy) set_new_freq_locked($carrier_freq) Sampling Rate sampling_rate real Audio Frequency (Hz) carrier_freq real Words per Minute wpm 20 int Compute Energy energy enum No False Yes True freq message 1 in float out float