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[aprssig] 400 Mhz Radiosondes

Robert Bruninga bruninga at usna.edu
Thu Sep 13 17:51:23 UTC 2007


> What is the modulation scheme?  AFSK on FM, FSK, etc.?

Unfortunately, I do not know.   Bob, WB4APR

> ... the NWS launches them at the same
> time every day...
> 
> 400.250
> 400.625
> 401.000





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