Ce
Steps were taken both during and after the CASTLE Operation
in line with the abowe.
Many of the concepts of the role of weather and
ite effects on the cperation were changed.
For example, the increasing
importance of the problem of deposition of radioactive debris in the test
area led to the beginning of a complete re-evaluation of the techniques
of forecasting areas of fall-out and greater consideration of the longrange effects of the wind flow.
It was found advisable to have a duty
forecaster work directly with radsafe personel during periods just prior
to the shot.
It was necessary for this forecaster to be completely familiar
with the current flow patterns at all levels, and the forecast changes
through twenty-four hours after the valid time of the forecast in line with
the procedure for constructing air particle trajectory forecasts,
In order
to take into account the effect of the wind, the forecaster was prepared
to give wind forecasts for levels as high as ninety thousand feet for a
:
period of twenty-four hours over an area of approximately 500 miles in
radius.
The problem reached such a magnitude during CASTLE that continuing
extensive work is to be done at the Loe Alams Scientific Laboratories
utilising the services of a qualified forecaster experienced in PPG
weather requirements and the talent and know-how of scientists presently
on duty there.
It is felt that this problem is one of the most important
to be solved for future weapons test operations.
Of equal importance is
the further research into improvement of weather forecast techniques and
procedures for the Marshall Islands area, currently being extensively
investigated by Dr. C. £. Palmer of the Calm Research Center at Wheeler
All of the above represents attempts to improve the systans
7
ee
AFB. Hawaii.