Decode imagery from the UmKa-1 amateur telescope!
As of 2023-07-04, the satellite UmKa-1 is alive and healthy in orbit. This tool decodes S band dump transmissions from the spacecraft. This contains high resolution imagery from the telescope on board the satellite.
EDIT: As of Sept 25, 2023, the telescope and the S band downlink has failed. The imagery is now transmitted from an engineering camera via the 437.625 MHz downlink as 19200 baud FSK. I currently do not have any recording of this dump, so I am unable to write any decoders. SSTV is planned eventually.
For more information, see https://telegra.ph/Otchet-o-statuse-missii-orbitalnogo-kosmicheskogo-teleskopa-UmKA-1-RS40S-09-25 (in Russian).
Input: Derandomized and synchronized CADU (example in repository).
Output: FITS telescope files and converted PNG imagery.
To decode imagery:
python decoder.py -f umka_1.cadu -o umka_1.fits
This will read CADU frames from "umka_1.cadu" and output to "umka_1.fits" and "umka_1.fits.png."
If you have very noisy frames, CRC checking should be enabled with the -crc flag. This does take much longer, though, so use it wisely!
The decoder depends on the following packages:
PIL/Pillow tqdm astropy crc