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Task Group 7.4's mission, as already stated, was to perform nuclear
cloud sampling, aircraft effects measurement and technical photography
as primary functions, and inter~island and intra-atoll airlift, weather
reconnaissance and reporting, air rescue and communications as secondary
functions.
A.
NUCLEAR CLOUD SAMPLING
The sampling program consisted of collecting particulate and gas-
eous matter from the atomic cloud.
Particulate samples were collected
on a special type filter paper in specially designed wing tip tank filters.
Gaseous samples were pumped by special devices into bags or bot-
tles in the aircraft.
"
The Los Alamos Scientific Laboratory and the University of Califor~
nia Radiation Laboratory indicated the quantity of samples desired and
allowed Task Group 7.4 to establish the aircraft requirements necessary
to take this quantity.
Two B-36's, fifteen F-84G's and one WB-29 were
designated as samplers,
;
Nuclear cloud sampling was the task of locatingand obtaining, for
radiochemical analysis, the best possible representative samples of
radioactive particles available throughout the nuclear cloud which ensued
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