The astronauts turned on a data packet repeater on the space station last week. When the station is overhead licensed amateur radio operators can send short messages to the station and it re-transmits those messages back to the ground. I had a successful transmission on my first shot!
Somebody from Virginia heard me through the station and sent a message back:
To hit the repeater I used a handheld radio, an Arrow Satellite antenna, and a Signalink USB soundbox that I talked about in this video. I used a piece of software called PinPoint to manage the data packet traffic which connects up with another piece of software called Direwolf that listens for the packets and passes them to Pinpoint.
Here’s a fun video from RetroRecipes where they made contact using a Commodore 64! This worked because the packet data protocol used is the same one that was used in the 1980s to transmit data over the radio. Sometimes when something works it doesn’t need to change all that much.
This repeater isn’t always active. But the voice repeater on the station is usually going all the time. Sometimes you can even catch an astronaut operating the station during their break periods!
You can learn more about amateur radio on the ISS by visiting the ARISS website.