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[aprssig] 400 Mhz Radiosondes

Gerry Creager gerry.creager at tamu.edu
Thu Sep 13 18:48:02 UTC 2007


Older sondes are AFSK, newer ones tend toward newer modulation schemes, 
like GFSK.  More data being sent with the newer sondes, including 
position and altitude via GPS.

gerry

Jason Winningham wrote:
> 
> On Sep 13, 2007, at 12:24 PM, Tim Smith wrote:
> 
>> Bob:
>>
>> What is the modulation scheme?  AFSK on FM, FSK, etc.?
> 
> IIRC, the 400MHz sondes flown around here are 300 baud AFSK on wide FM.
> 
> -Jason
> kg4wsv
> 
> 
> 
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-- 
Gerry Creager -- gerry.creager at tamu.edu
Texas Mesonet -- AATLT, Texas A&M University
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