Van: "Lindisfarne Poacher"
Onderwerp: Veering or Backing with height
Datum: maandag 22 april 2013 19:11

On Mon, 22 Apr 2013 17:52:54 +0100, George Booth wrote:

snip

Thanks Bernard at al for the full explanation. Unfortunately my highest
winch launch was 2200' well within the boundary layer. Others have done
better though.

I seem to recall that a lot of research on boundary layer stuff was done
at RAF Cardington near Bedford using "BALTHUM" equipment.

http://www.sciencephoto.com/media/158202/view

I think a lot of "secret squirrel" stuff also went on there judging by
the reaction of a certain forecaster I worked with when that station was
mentioned in conversation!

For an couple of weeks a collegue and I, both Dutch AC2's, did the weather
observations during the time a barrage balloon equiped with a thermometer, a
hygrometer and a Robinson windspeed meter went up - an down.
Mr. Ferguson let the balloon rise while mr. McCan, in a hut, read the data
from a screen.
As far as I remember the maximum height must have been around 4000 ft.
Another thing I remember are tiny fluctuations in temperature while looking
at the mercury in the Stevenson screen. Was it possible to measure the wind
direction with height? I don't know.
'Secret squirrel stuff' was not noticed in 1945. Later perhaps, and what
could it be?
All this in september 1945 in Cardington while we were waiting to go to the
Air Ministry Meteorological Training School in Kilburn, London NW.

Sytze Stel, Netherlands