2 ms·
I tuned into 437.800 MHz here in South Africa - the ISS is probably a couple of thousand km's south of here now. As I tuned in, I got morse code for 5-6 second
by sgt 6y ago
I tuned into 437.800 MHz here in South Africa - the ISS is probably a couple of thousand km's south of here now. As I tuned in, I got morse code for 5-6 seconds. Didn't record or pick up what it was. I wonder if it was the ISS or something else.
- paulirwin 6y agoCould be station identification. Many repeaters identify their call with morse code periodically.
- arghwhat 6y agoTo elaborate: It's a requirement that amateur radio stations periodically identify themselves by the operator callsign during transmission. For unmanned stations like repeaters this is usually accomplished with an automatic morse-code transmission of its callsign. The transmission occurs if the repeater has been activated, usually every 10 mins or so after a moment of silence, or after a longer period of silence, whichever comes first. (The repeater users still have to identify themselves with their own callsign during use of a repeater.)