Chapter 3
DATA AND RESULTS
3-1
The absorption itself thus becomes an important phenomenon.
The difference between the absorptive effect at Rongerik Atoll and
at Site Elmer is apparent in Figz. 3.1 and 3.2, original‘y prepared
Legend:
.
_
»~—x—+-lverage values
Max and min observed values
5—
[4
|
Minimum frequency (mc)
b
&
For lleday period preceding day of Shot 4
Symbo)\_useds
B ~ Absorption (complete)
]
.
Minimum detectable frequency, day of Shot 4
886e6
_
a
°
The attempt to achieve the first principal objective —= verification of the F2-layer rise and related effects fol2cwing megaton-order
explosions — war partially frustrated by severe and protracted absorption, particularly at Site Elmer, causing complete attention of the
vertically transmitted radio waves until 7 or 8 hours after detonation.
E\
Wr.
‘
.
:
-
ABSORPTIVE EFFECTS
pmb)
~
“2%
2-5
7
4
i—
H
t
06
!
{
08
1.
t
10
1
}
i2
lj
Local time (hours)
i
ia
1
i
is
i
Fig. 3.1 = Minimum Frequency Detected at Rongerik for Day of Shot 4,
Compared with Normal Values
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C
SECRET
18