Observation 3981833: NETSAT 3 (46505)

Regarding Observation 3981833 am I right with the assumption that peak signals startin lower left and bend sharply in the middle and finall approaching slowly a maximum are nothing else but the picture of a constant frequency terrestial tx as seen by a receiver which is once a second adjusted to an expected doppler shift?

Yes, you are right! A real satellite signal tracked by doppler correction should be a straight line.