RAPPs
{ continued)

availability of meteorological data than by any actual c
sideration of the cloud.

This cylinder of cloud was th

assuzed to be torn by shear, expand at some slow rate an

100% of all the materials that cam in contact with a ra
area was considered to be deposited on the ground iase
tely.

Thisstudy was the only one to ay knowledge in ¥

many boabs were considered,

Colonel] Eolszan was trying

estimate the hazards froa a canpaign of bombs in a ssall
area.

There are several things with due apology to Colonel

Holzman, that are wrong with this.

One, the cylinder ef

atomic debris did not extend uniformly froa 20,000 feet
down to the ground.

it is generally higher than this

go when the RAND stody was made, I can call this the ¥ar
I ¥odel for scavenging of rain, we took a cylinder and
expanded it assuming that the zaterial was homogeneously

distributed through this cylinder.

#e considered the

observed height of the cloud, expanded it horizontally
vertically and assumed that all the material below the

-15° isotherm was brought down to the ground in the fora
rain,

Se didn’t take into account the shear of the wind,

so that was one thing that was missing.

Then the people Froa

AIS&P worked on the problem and they said well it is any
to consider all the material brought dom as soon as it hits
the rain and they allowed for a finite tine of scavenging

Department of Fxorny
Histerinv > 0
pre
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9

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