Regarding Observation 4909076 …
This plot looks like it’s got some of the indicators of a signal, but not all of them. Does the plot show a valid signal?
This looks like local noise to me, and the satellite was very low on the horizon. To receive Meteor-M2 with a V-dipole, you need a high elevation pass. For decoding you can follow this how to:
https://community.libre.space/t/howto-meteor-m2-weather-satellite-image-decoding/
Best regards, Eelke.