Regarding Observation 12641508 Looks quite strange - is this really the signal of the satellite?
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Judging from the previous observations the signals come from the satellite.
The signals here are not following a straight path as it would expected, this happens as the satellite is near its re-entry (TLE parameter “Mean motion/revolutions per day” is over 16.0) and the TLE used for the observation was 4 days old (check in the observation details “Observation start since TLE epoch” value).
In other words, the orbit of the satellite changes quicker due to its re-entry and we don’t have updated/accurate TLE set to track it, so the signals following a curved path instead of a straight one.