i
_
ee
tests since Ivy we have reasonable confid-
ence in our factors of altitudes so that we
really feel we can measure radiation from
an aircraft and within reasonable limits
Giving you the figure that you have on the
surface.
Recentiy we have had other peovle
working on this problem and they have come
up eccentially with the seme information.
The only way you can know what it:
is on the ground is to vary your altitude
and if it stays pretty constant you know what
4t is,
DR. BRUES::
Does it compensate
the factor very, very mich?
MR. CASSIDY:
TI don't think it is.
The compensating factor falls in very well,
This is one of the big problems we have}
_ this ie sort of an uncertainty and this is
' gomething that we have got to pin down some
day about just hy we are able to take these
measurements over a long period of time al-=
though sources of widely varying shapes and
densities and sizes can still come out with
a factor, thet is fairly constant cver these
altitudes,
is