a
-
ee
They were crise-crossing each
other continually and, well, we just didn't
realize the difficulties involved.
This
sort of proved the problems in a real exercise,
Unfortunately the contamination
wags very spotty and it would add over
orders of magnitude, 20 fect, 30 fest, things
like this so that when we followed up the
ground survey with an aerial survey, we could
not aatch exactly the readings because in an
area that ie proportional to its height, if
you are flying et 200 feet with this particue
lar instrument, you see an area roughly of
400 feet in diameter,
So that, when you are trying to
compare readings taken, when your tests .
vary within ten or twenty feet, you would
find it impossible because this would read
an average of the radiation intensity over
this erea,
If you went to 400 feet this would
go to 800 feet.
(Indicating).
We define this -- the contribution
from this point out here is fifty per cent
from what you would get at this central point,
151