Once upon a time I worked on a project where we SSH'd into a satellite for debugging and updates via your standard electronics hobbiest-tier 915mhz radio. Performance was not great but it worked and was cheap.

https://github.com/markqvist/Reticulum

and RNode would be a better match.

In aerial robotics, 900MHz telemetry links (like Microhard) are standard. And running SSH over them is common practice I guess.

what's wrong with tcp, on a crappy link, when guaranteed delivery is required? wasn't it invented when slow crappy links were the norm?