Thread: Weather Balloons 1942
View Single Post
  #9   Report Post  
Old November 13th 04, 05:39 PM posted to sci.geo.meteorology
Jim Jim is offline
external usenet poster
  
First recorded activity by Weather-Banter: Mar 2005
Posts: 20
Default Weather Balloons 1942
On Sat, 13 Nov 2004 16:32 +0000 (GMT Standard Time),
(Brian Salt) wrote:

In article , 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
Reply With QuoteReply With Quote