Re: 120 mph ?
Posted by Chris in Tampa on 10/25/2011, 7:43 pm
I just found this interesting little description:

"The GPS sonde is a lightweight instrument package that is launched from the WC-130J aircraft. As it descends from aircraft altitude (5,000 - 38,000 feet) to the surface, at about 2500 feet per minute, it measures and transmits current pressure, temperature, humidity, wind speed and direction, and GPS position information to AVAPS hardware in the aircraft every 0.05 seconds. The sonde also receives GPS navigation signals from at least four GPS satellites, and measures the Doppler shift of each signal. Up to four sondes can be deployed simultaneously. AVAPS receives this data, processes it, then displays the time from launch, raw weather data, number of GPS satellites being tracked, and geopotential altitude for each sonde deployed. The raw and processed data are also written to the computer's internal hard drive. After the drop has ended, the data files can be printed and data can be analyzed by the ASPEN program."

http://www.403wg.afrc.af.mil/library/factsheets/factsheet.asp?id=3448

And here is where you can download the ASPEN program if anyone is interested in it:
http://www.eol.ucar.edu/isf/facilities/software/aspen/aspen.html

And download raw data here:
http://www.aoml.noaa.gov/hrd/data_sub/hurr.html
For sondes from the FTP server when it is available.
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Heads up FL from Tampa down to Western tip of Cuba! - Will_TX, 10/25/2011, 1:36 pm
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