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GENERAL
Comments on Measurements
The program of measurements undertaken for CASTLE was
“‘eoncluded with a reasonable amount of success.
obtained covering the range from 0.3 to 250 psi.
Overpressure data were
Pressure-time
records iwere obtained from each shot. The positive-phase durations
are t wrated for each shot and presented in Chapter 3. The values
has been initfated at BRL to insure better time measurements on all
future tests/{.
The pbak overpressures obtained agree with measurements made
by the Sandia Corporation (Reference 4),
was considerably
;\than ft
~ 10 percent.
presented in Tableei
4.1.2
Pressure .At
Shot 3 produced
distinct curves of pres
deviation of at least 2
In most cases, the variation
A comparison of values is
tion on Shot 3
Bray anomalous results.
On this shot two
eiversus distance were obtained with a
cent.
As seen in Figure 2.5, two blast
lines were instx‘unented approxuhately 180° apart.
One blast line
covered the Tare Complex, whille}
the other extended along Site UNCLE,
The pressures obtained along the Tare Complex were as much as 20
percent lower than the press
at comparable distances on Uncle.
Strong evidence has been obteined witt
indicates that the shot was
fired during a heavy localized rain storm on the Tare Complex.
Photo-
graphs taken by TU-9 during the shot
fom a station on Site Oboe show
a general diffuse light but no fire
.
Further evidence was found
in some aerial radar photographs taken by
Project 6.1 before and after
shot time. These photographs show that e
er a cloud with a high
moisture content or a rain storm was centered over the Tare Complex.
The Tare Complex is completely obscured,
whereas Sites Uncle, Victor,
and William are clearly discernible (See FiguresM2 and 4.3),
Still
further indication of the unsettled atmospheric bonaitions is the
apparent attenuation of the thermal energy slong the Tare Complex.
satisfacThe flash initiators of the pressure-time gases 3 Dwettioned
2
torily on Site Uncle out to and including the fur vw. . tee ata
distance of 9380 feet from ground zero.
On the ..v
fips he
6300-foot station was the furtherest out station at vide the initiators functioned.
Because of the low yield, Shot 35 was a disappointment to many
44
ap
See.