Decoding packets from AALTO-1 ( 42775)

[fredy]

@petrinm

Unfortunately ~4kHz frequency offset in the observation breaks most of the frames. Aalto-1’s center frequency should be pretty accurately 437.220 MHz but for some reason SatNOGS’ transmitters info defines it to be 437.216 MHz for GFSK9k6 mode. With correct center frequency and that good SNR, you should be able to decode much more frames.

Thanks for the info, I’ve just approved @uy0ll suggestion in SatNOGS DB - AALTO-1 so now the transmitter has the right frequency which means that we will see more decoded frames. Also I have noticed @BOCTOK-1 to give priority on the GFSK transmitter over the CW one when scheduling AALTO-1.

With these info maybe we can start building a decoder (cc’ing @DL4PD but anyone else is also welcome) in order to create a dashboard at https://dashboard.satnogs.org even if it doesn’t make so much sense, if I understand correctly the format, it would be nice to visualize whatever we can.

@petrinm as soon as you have more info on Foresail-1 please let us know with a thread here or by opening issues on related SatNOGS repositories (here for decoder and here for adding the satellite in DB) so we can prepare and test any implementation before launch.