OPERATION IVY DATE:
TIME:
PPG time
1 Nov 1952
O715
Mike
GMT
Sponsor:
31 Oct 1952
1915
SITE:
LASL
.
PPG - Eniwetok - Flora
12° 14'
162° 11'
1k"
ki"
Site elevation:
TOTAL YIELD:
10.4 mt
HEIGHT OF BURST:
FIREPALL DATA:
Time to lst minimum:
270 to 310 msec
Time to 2nd maximum:
3 to 3.5 sec
Radius at end maximum
MM
CLOUD TOP HEIGHT:
CLOUD BOTTOM HeIGHT:
CRATER DATA:
N
E
Sea level
Surface
TYPE OF BURST AND PLACEMENT:
Surface burst on coral soil
and water
98,000 ft MSL
59,000 ft MSL
Diameter:
Depth:
6,240 ft
164 ft
REMARKS:
Most of the fallout occurred over the open sea.
Documentation of
the fallout was thus limited to the islands and the lagoon of
Eniwetok atoll.
The lagoon dose rates were determined by multiplying
the readings obtained on rafts by the factor 7.
This factor is
based upon the ratio of Operation Jangle field dose rates and readings
taken over flat plates after their removal from the contaminated area.
The data presented for the lagoon stations can thus be considered as
approximations only.
The island dose rates are based upon groundand aerial-survey readings and were adjusted to H+l hour by using
the t-1"* law to approximate .he decay.
51