This is an extremely brief attempt at following up on the research done by Daniel Estévez on reverse engineering the ESCAPADE X-band downlink data.

Following on from the existing research, the Space Packets in APID 51 contain nested packets with the following header:

• 4 byte size
• 2 byte packet ID
• 4 byte UNIX timestamp
• 2 byte fractional second(?)

The packet ID in this nested header is not the same kind of ID as the APID 51 in the Space Packet header, but is referred to as APID in the ASCII logs, so I'll refer to it as APID.

I based my analysis on the data files made available by Daniel Estévez here. The data dumped from these files is available in the dumps subfolder of this repository, including the cleanly concatenated ASCII logs in APID 540 and the files downloaded in APID 720.