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Because of the time zone, I recorded both the I-Q bit stream from the receiver and the demodulated audio for analysis later in the morning.
I have only had chance to listen to the audio recording. The SAQ signals were quite strong this time and I could easily hear the transmission from 1000:00 to 1009:20 UTC. I have not yet analyzed the I-Q spectra.
Equipment: Radio receiver & local antenna
Equipment details: Shop-built square loop antenna, 1.2 m diagonal connected to an SDRPlay SDRduo software defined radio receiver. Receiver operated by SDRuno software.
Additional information: https://reeve.com/Documents/Articles%20Papers/Reeve_CohoeVLFLoopAntenna.pdf and https://reeve.com/Documents/Articles%20Papers/Reeve_SquareLoopAntenna1.2m.pdf