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Fun fact: There is an APRS repeater on the ISS. You can use the ISS as a relay to the APRS network. And APRS has a cellular gateway, which means you can send SMS messages to mobile phones via the ISS.

* Sending SMS Messages Through the ISS

https://www.kj7nzl.net/blog/sending-sms-messages-through-iss...

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It’s off right now. Plans are to add a second radio in the Russian segment later so they have two IORS modules running at the same time. Then they can operate both the repeater and digipeater.

Apparently there is a non profit that relays some of those messages via satellite:

http://forums.othernet.is/t/aprs-outnet-on-outernet/2620

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