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'!

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.