OPERATION CASTLE
DATE:
TLMis:
PPG time
7 Apr 1954
0620
- Koon
Sponsor:
Gr
6 Apr l9o4
SITs:
1820
UCRL
PPG - Bikini - Tare
11° 29g!
165° ee!
48"
O3"
Site elevation:
110 kt
FIREBALL DATA:
Time to lst winimum
WDIGHT OFBUROT:
Sea
level
13.6 ft
53,000 ft MSL
CLOUD TOP _HELGHT:
NM
CLOUD BOTTOM TiSiGir:
52.9 4 2 msec
= PD
=
TOTAL YIELD:
N
E
Time to end maximum:
Nk
Radins at end maximum:
NM
CRATER DATA:
Diameter:
Depth:
800 ft
75 ft
TYPE OF BURST AND PLACEIMEN?:
Surface buret from platform on
coral soil
REMARKS:
The on-site fallout pattern was constructed from survey readings made
py technical project persennel and by the Redivlogical Satety organizution,
plus conversion of uctivity measurements of fallout samples collected on
rafts and free-floating buoys anchored in the lagoon.
The fallout
ocenrred jidcally with respeet to the measurenent stations so that more
eadings than usual were available.
The dose-rate readings were
extrapolated to H+] hour by using actual rield decay rates
76