Re: Weather Balloons 1942

From: Jim (jkorman_at_alltel.net)
Date: 11/13/04 

Date: Sat, 13 Nov 2004 17:39:34 GMT

On Sat, 13 Nov 2004 16:32 +0000 (GMT Standard Time),
briansalt@cix.co.uk (Brian Salt) wrote:

>In article <ho-dnfV5DNOwugjcRVn-3Q@adelphia.com>, ToweringQs AT
>adelphia.net (TQ) wrote:
>
>> Known ascent rate of the pilot balloon (AKA pibal) and an
>> azimuth/elevation
>> angle theodolite reading every 30 seconds plotted on polar graph paper
>> will
>> produce a vertical wind profile. Trigonometry works, too.
>
>Afraid I don't know the expression 'pibal'!

PIBAL (Pi)lot (Bal)loon

>Please note that I am not a theodolite user. What I am asking is "How
>would one do it with just one theodolite?" Perhaps I should look at how a
>theodolite works and how it is used :-)
>
>Of course trigonometry works, but you have to have data in order for it to
>work.
>
>Brian.

The US Federal Meterorlogical Handbook #3 is a good reference

http://www.ofcm.gov/fmh3/text/default.htm

Enjoy

Jim