OPERATION GREENHOUSE -
DATE:
TIME:
PPG time
Easy
GMT
Sponsor:
21 Apr 1951 20 Apr 1951
0627
1827
SITE:
:
LASL
PPG - Eniwetok - Janet
11°
162°
«4o')
1k'
Site elevation:
TOTAL YIELD:
47 kt
608"
a5"
HEIGHT OF BURST:
ON
&E
Sea level
300 ft
TYPE OF BURST AND PLACEMENT:
Tower burst over coral soil
FIREBALL DATA:
Time to ist minimum:
Time to @nd maximum:
Radius at end maximum:
CRATER DATA:
Diameter:
Depth:
19 to 29.5 msec
200 to 230 msec
NM
CLOUD TOP HEIGHT:
CLOUD BOTTOM HEIGHT:
41,000 ft MSL
30,000 ft MSL
836 ft
2.4 ft
REMARKS:
The fallout readings on the shot island were obtained by the
Radiological Safety organization at H+28 hours and corrected to
H+l hours, using the t7!°? decay approximation.
Dose rates
shown for other islands are based upon daily surveys made to
determine field decay rates.
Readings were made 1 meter above
the ground with gamma ionization chambers.
The values shown
were corrected to Ht+tl hour by extrapolating from the experimental
decay curves.
There was a wind shear at about 15,000 feet.
33