Week 45 did not bring too many news for MarconISSta. The system is still operational and measurements were taken in some of the bands outside of the VHF bands (AIS bands, Space Operation/ MetSat bands). In absence of other news, find some plots below.
Look at these waterfall plots. The constant signals at 137.5 MHz, ~137.2 MHz etc are self-induced artefacts. From 11:30 there is a lot of activity and for some signals the frequency changes. Normally, the frequency of signals is higher during approach of the source, while it is lower while moving away. For some of the signals, this “Doppler shift” is in the opposite way than expected. Any idea what this is? We do. One hint: It keeps recurring over various parts of the world, mainly over North America (http://www.isstracker.com/historical).
Any idea what the signal at 144 MHz to 144.2 MHz at around 00:30 on November 4th might be?
We won’t receive new data this week, as the ground control team is busy with other real-time Ops. New data is expected on November 22nd 18.