uc, ALAMOS SCIENTIFIC LABORATORY
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UNIVERSITY IDF CALIFORNIA
LOS ALAMOB, NEW MEXICO
OFFICE MEMORANDUM
TO
Gaelen Feit, J=15
DATE:
FROM
Tom White, H6
SUBJECT:
SOMS NOTES ON AN OPTICAL FALLOUT AKALOGUE
SYMBOL :
Hb
June 2h, 1955
o
407608
BEST COPY AVAILABLE
This refers to some points in your 17 June memo on the above
Bubject,
AS noted in our conversation this morning, the discrepancy b@tween
differertiéls was overlooked in auoting our fallrate functiog to yous
Your equation on page 9 should be
|
:
F(Af)at=
_o2
S (4) Jar
exp -+
2
fmt -ine, ()
2
O74)
-
\oa (ime)
so that some of your subsequent numerical calculations shoul
be reduced by
With regard to the values of f and Sused during rost of
following should be noted, (ie took the Weather Bureau com
fitted the activity vs particle size data for each cloud la
normal distribution, The fit turned ovt to be surprisingly
reessonable error, the mean log particle diameter wes a line
mAPOT, the
site model, and
er to a log
afactor
f,
height, end the standard deviation was independent of heizh
good,
Within
r function of
in an effort to make our rachine calculetion reproduce thes features of the
eather Bureau model, we then used the aerodynamic theory f r spherical
uvuld put appro:
particles to convert. to effective values of f,, and Othat
imately the same distribution on the ground from a &0,000 oot cloud,
If one assumes that in a higher cloud, the sane activity v
Giameter would
wiesther Bureeu data, this is the only rezsenable assumptiowg
that we can
exist at the same fractional heisht, then the effective f
would come cut differently. It seems to me that if we went}
make,
we may then want to have two sets of
and one for MT clouds,
f
and g~ values
to use the
end G~ vafues; one for kT
I hope soon to have some calculatidns that will tell
how much difference it rixsht mike.
Tw: bg
yeu
Distribution:
Si chleer, H-46
Be
"Ali Re
watt,
J=-16
RG
Thom
326 US ATOLL EXER!
COUNTS108
H, Eoerlin, J-10
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L, Cérdner, GA
A, Eord, J-7
1 sileection e
Gl pelt? 3-15
Bralec
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