ABCS Digipeater

The satellite will reply to an incoming radioamateur packet by resending it to ground.

The last callsign of the last radioamateur that contacted the satellite is reported in the beacon message of the satellite (type 02).

Using the digipeater is extremely simple: To use the digipeater one just needs to send a valid ax.25 data packet starting with the keyword “HAM” followed by the message.

Example: "HAMHello world!!!"

ABCS will transmit: "CQHello world!!!"

The message length is limited to 140 characters to avoid overloading the satellite radio and cope with the limited power budget. For the same reason, a dead time of about 10 seconds is then applied before the next digipeater action is enabled. However, any contact in this time window will be counted and the callsign stored onboard and reported in the beacon.