Recording of Artemis I ArgoMoon with the Allen Telescope Array on 2022-11-16

This dataset contains an IQ recording of the X-band 8475 MHz telemetry signal from the Artemis I ArgoMoon cubesat. The recording was done on 2022-11-16, about seven hours after launch. Antennas 1a and 5c from the Allen Telescope Array were used in dual XY (linear) polarization.

The hardware configuration was as follows: the antennas were connected to RFCB LO d, which was tuned to a frequency of 8475 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 digitized both polarizations of antenna 1a, while the USRP N320 digitized both polarizations of antenna 5c. The USRPs used an 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 USRPs was 1.92 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 detached headers are also provided in the dataset (they have the .hdr extension).

There are two recordings in this data set. A different modulation and data rate is used by ArgoMoon in each of them.