The #SOTAMāt approach to spotting and messaging over HF and FT8 has inspired me to put together —yes, I did use *that* help— an experimental receiver for messages of the kind used by SOTAMāt (that is, a single letter, a blank, a callsign, the slash, and a hopefully meaningless suffix, as in 'Z EA5IYL/33QQ' (using 'Z' instead of SOTAMāt 'S'). Very rudimentary, but could be useful.

https://gitlab.com/mlforcada/ft8-messaging

Mikel Forcada / ft8-messaging · GitLab

GitLab.com

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By the way, while I understand the reasons behind Brian's AB6D's decision, I think the #sotamat app could have been free/open-source. I know there are some 'secrets' as regards suffix selection and computation, but I'm sure a FOSS app with some kind of configuration encryption would have allowed users to repurpose it for other uses.