Observation 339784: METEOR-M 2 (40069)

Regarding Observation 339784

Anyone know why waterfall has horizontal drops in the signal? I’m seeing them quite clearly in completely different setup and location.

Tried to tune rtl_sdr performance on raspberrypi. After some improvements in the performance, still seeing them.

Similar drops could be found at https://network.satnogs.org/observations/340111/
They aren’t clear as at the first observation, but still visible.