OPERATION HARDIACK I=
PATE:
TIME:
PPG Time
18 July 1958
1100
Pisonia
GMT
Sponsor:
17 July 1958
2300
SITE:
LASL
PPG - Eniwetok - 11,000 ft
W of Yvonne
11° 33'
162° 19'
N
43"
Site elevation:
HEIGHT OF BURST:
&£
Sea
level
6.5 ft
TYPE OF BURST AND PLACEMENT:
Surface burst from barge on
water
CLOUD TOP HEIGHT:
55,000 ft MSL
CLOUD BOTTOM HETGa?:
NM
REMARKS:
Only individual island dose rates are available.
These were
obtained from Radiological Safety organization helicopter surveys
at Ht4 hours.
The helicopter survey technique called for the
pilot either to land the aircraft at the desired spot, so that a
ground reading could be obtained, or to make a slow pass over the
desired spot at an elevation of 25 feet.
Readings taken at <5
feet were multiplied by a factor of 2 in order to obtain a
reasonable approximation of the true ground reading.
The basic
instrument used in the aerial surveys was the AN/PDR-39 survey
meter modified to read up to 500 r/hr.
The t-}+* decay approximation was used to extrapolate the H+ hour dose-rate readings to H+l
hour.
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