Imet-4 support?

[albertus62]

It would be nice if you can add Imet-4 sondes like the sondes launched from Beauvechain (B) to your plugin. Normally I use Mysondy to receive a sonde near the landing spot but Mysondy can not support Imet.

[dbdexter-dev]

I think I got the decoding pretty much down, but there's very few recordings of Imet radiosondes available online, and none that I could find in IQ format. Not a big deal since the protocol is well documented, but I'm not sure that the bandwidth I chose is correct.

Do you mind testing the new decoder? You can find pre-compiled binaries for the latest nightly here, and the source code in the dev branch. You can also send me a baseband recording if that's easier for you (any bandwidth is fine)

[albertus62]

Dear Davide,

Thanks for your reaction and the effort to add imet-4 to your plugin. I have asked my radiosonde friends here in the Netherlands and Belgium to help me test the software when Beauvechain is sending imet-4 sondes and eventually send you the baseband recordings. When I install your plugin under windows10, i get the following error:

[image: image.png] Looking forward to your reaction.

Regards,

Albert PA3CPF

Op zo 1 mei 2022 om 17:15 schreef Davide Belloli @.***>:

I think I got the decoding pretty much down, but there's very few recordings of Imet radiosondes available online, and none that I could find in IQ format. Not a big deal since the protocol is well documented, but I'm not sure that the bandwidth I chose is correct.

Do you mind testing the new decoder? You can find pre-compiled binaries for the latest nightly here https://github.com/dbdexter-dev/sdrpp_radiosonde/releases/tag/v0.8-rc6, and the source code in the dev branch https://github.com/dbdexter-dev/sdrpp_radiosonde/tree/dev. You can also send me a baseband recording if that's easier for you (any bandwidth is fine)

— Reply to this email directly, view it on GitHub https://github.com/dbdexter-dev/sdrpp_radiosonde/issues/7#issuecomment-1114263457, or unsubscribe https://github.com/notifications/unsubscribe-auth/AUTSEVAFP6EQY2IPV5GBFC3VH2NZTANCNFSM5UBGIFMQ . You are receiving this because you authored the thread.Message ID: @.***>

[albertus62]

Error: The procedure entry points args could not be located in the dynamic library.

[albertus62]

Link for baseband file.

https://wetransfer.com/downloads/c7509bba6cf2cb1687950bc5b097a44020220502160002/8ed70e2bf431425d16bc708df3e0c72420220502160024/5c1a8c

Happysat (www.happysat.nl) is telling me the tuning frequency step is 5khz. It would be nice when it is 1 khz.

[CdtSylvestre]

Great plugin. Compiled V0.8 RC6 (along with a recent dev version of SDR++) on Raspberry PI OS and I can confirm that the IMET-4 decoding is functional after successfully tracking two radiosondes launched from Beauvechain, Belgium.

[Correction: latest decoder dll works fine on Windows too, provided that it is used in combination with a recent nightly build of SDR++ (v1.0.6). Latest stable release of SDR++ (v1.0.4) throws an "Error: The procedure entry points args could not be located in the dynamic library"]

[albertus62]

This morning I could find the imet4 from Beauvechain.

https://radiosondy.info/sonde_archive.php?sondenumber=IMET88135

Thanks for all the work!

Still one question: How can I plot the gps coordinates on a map during the flight?

[py5cv]

Link for baseband file.

https://wetransfer.com/downloads/c7509bba6cf2cb1687950bc5b097a44020220502160002/8ed70e2bf431425d16bc708df3e0c72420220502160024/5c1a8c

Happysat (www.happysat.nl) is telling me the tuning frequency step is 5khz. It would be nice when it is 1 khz.

It is no longer available. Could you make it available again? Thanks !

[ra1nb0w]

@albertus62 have you find a linux software that show and update automatically the map from the gpx file?

[ra1nb0w]

https://wiki.openstreetmap.org/wiki/Viking should work fine