Recording of DELFI-PQ/EASAT-2/HADES PocketQubes and other amateur satellites in the SpaceX Transporter 3 launch with the Allen Telescope Array on 2022-01-16

This dataset contains a recording of the 435 MHz telemetry signals of the DELFI-PQ, EASAT-2, HADES PocketQubes and other amateur satellites in the SpaceX Transporter 3 launch. The recording was done on 2022-01-16, three days after launch. Antennas 1a and 1f from the Allen Telescope Array were used in dual XY (linear) polarization.

The hardware configuration was as follows: the two antennas were connected to RFCB LO d, which was tuned to a frequency of 436.5 MHz and used an output IF of 512 MHz. A USRP N321 and a USRP N320 were connected to the IF output of the RFCB. The USRP N321 and digitized both polarizations of antenna 1a, and the USRP N320 digitized both polarizations of antenna 1f. Both USRPs used external 10 MHz reference and PPS coming from the observatory distribution system, and LO sharing was set up among all the channels. The IQ  sample rate of the USRP was 3.84 Msps and a GNU Radio flowgraph was used to record IQ data to disk.

The GNU Radio flowgraph stored the IQ data for each channel as 16-bin integers in the GNU Radio metatata file format, with detached headers. After recording, the data was converted to SigMF format.

The following TLE was used for antenna tracking:

1 99489U          22016.00000000  .00000000  00000-0  57534-2 0    09
2 99489  97.5121  85.6393 0012811 246.2946 131.6449 15.14316081    04

This TLE was fitted to previous Doppler observations of DELFI-PQ done by amateurs.