callsign for testing?

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Roger M1CDQ

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Sep 22, 2025, 6:19:49 AM (11 days ago) Sep 22
to UKHAS
is there a call sign to be used for testing
Im looking a building a tracker for a poss launch  next year but also  reprogram some radio sondes. 
Im just wondering if there is a callsign to use  thats filtered out  by sondehub 
so i can also test my receivers at home and in my car.

any suggestions or recomendations 

Im still doing a lot of reading up    

Mark Jessop

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Sep 22, 2025, 7:50:58 AM (11 days ago) Sep 22
to uk...@googlegroups.com
If you are re-flashing a radiosonde with a firmware that transmits Horus Binary telemetry, then use payload ID 256 (4FSKTEST-V2) - this is intended for testing purposes, and will be filtered off the amateur.sondehub.org map by default.
You can configure the tracker to show these in the settings tab.

73
Mark VK5QI

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