30m QRSS Spectrograms - Page 1
Scroll Left to Right to view a 3.75 hour period
Notes:
- 11:50 - a few blips near 1980hz which would be on the edge of the QRSS band - a bit of frequency instability. Suggests it is not a QRSS signal.
- 11:55 to 12:00 - vertical lines indicate broadband pulse-noise.
- 12:25 - another blip near 1970hz. These signals are real, but possibly unintended.
- Throughout - a feint line is visible at 1871hz. At 1425 it splits up into two lines separated by ~ 2hz. This might be DFCW or FSCW. Nowhere near strong enough to decode, so maybe it's interference or sent at a different QRSS rate (this was set to QRSS3).
- 12:50 - broadband noise - has a sweep characteristic almost as if it is motor related.
- 13:45 - a blip at 1986hz. Another bit of interference maybe.
- 14:15 - carrier at 1994hz shows up and stays on with a slight downward drift. This might be a sign of propagations opening up and letting signals from far away reach the receiver.
- 14:30 - strong signals at 1800hz or so. Maybe a BPSK transmission using the WOLF mode?
