I’ve been doing my best to take observations and vet them against other waterfalls with received data, but I haven’t been able to do that for the Meteor M-1 Mode V - QPSK Telemetry transmitter.
I’ve got a handful of my observations regarding Meteor M-1 that have those three lines near the left/middle of the waterfall.
I would think that would be interference, but other observations marked as good (like SatNOGS Network - Observation 11022256) appear to have similar lines. How come it is consistent across all Meteor M-1 observations and then disappears for other satellites or is this actually Meteor M-1?
Hi, my best bet: all QPSK transmitter obs so far are invalid / bad / or unintenionally marked as good.
The frequency is only 3 kHz away from the APT frequency on 137.100 which you can notice as signal source on some of the observatilons, where the signal does appear but not follow the doppler correction. So, it you get a valid transmission from the QPSK transmitter that signal should be completely straight on your observation and not show any curves.
Either the signal is weak or there is no actual transmission on this frequency would be my idea.