TAB A
CHEROKEE EVENT
OPERATION REDWING
1.
CHEROKEE was detonated over NAMU Island (CHARLIE) of BIKINI
Atoll at O551M, 21 May 1956.
feet.
The estimated burst altitude was 5,000
The cloud reached an estimated height of &0,000 feet with the
lower portion moving to the Northwest and upper and main portion
moving generally to the East-Northeast at approximately 10 knots.
Early reports on cloud height and initial cloud movement vere provided
by cloud penetration and sampler eireraft.,
f/11 reports gave low
intensities and confirmed the forecast cloud trajectories.
~
As
expected, the radiation exposure of the aircraft crews was relatively
DNA
lowe
2.
ZEBRA and ZEBRA I PeV radiation reconnzissance aircraft were
placed in holding patterns so located and oriented as to intercept any
cloud segments moving toward ENIWETOK or the task force fleet.
(See
TAB I for ZSBRA and ZEBRA I holding patterns.)
3, WILSON I (WB-SO cloud tracker) conducted a search beginning
at H*6 hours in a 30° sector, true bdaring 060° through 090° with apex
on RONGERIK, and extending 300 miles to the Hast.
(See T/B G.)
Two
contacts were made,in each case, the intensities were less than 10
mrfhr.
WILSON II search shown in TAB G encountered no siymificant
rediation.
He-gEF-SEVEN-LOG