,
me
.
a
wfae
eer ee gre cee
e ee Tent
a.
see TT
ween TAR
or
ee acael
pee a en IR aw
™
F
FT one radius of an asymmetric crater about 270 ft (easterly along
the island In addition,
surveyed for crater size.
a tower shot!
_
The results are not available at this time.
~ was
Jeeps were exposed on three events in an investigation of the response
of drag-sensitive targets. Good results were obtained and will supplement
the damage-prediction curves by including the blast conditions resulting from
these particular types of shots.
Water-wave studies were made on the megaton-range devices. Instruments were placed to document the Bikini Lagoon waves, and at distant
locations (Ailinginae and Eniwetok Atolls, and Wake and Johnston Islands) to
record the long-period ocean waves. icrobarographs were operated at
Wake and Johnston to investigate the possibility that these long-period waves
are air-coupled. Considerable inundation: photography was taken. Wave
action from].
in the Rikini Lagoon was less than expected, since the
crater did not brefth into the ocean or the deep channe! and, apparently,
there was unexpectedly great convergence and dissipation onto the near
islands of the Eninman complex.
These results, based on preliminary analysis in the field, must be
considered as tentative. Blast records will be re-examined and reanalyzed
at the laboratories. Photographic anaiysis cannot be accumplished at the
proving grounds and must await laboratory study.
However. a general statement of the accomplishment of. this program
can be made:
With the exception of thel_
in Which the drop error
affected the results of those projects participatiig,” the objectives of the
Program 1 projects were carried out. On all events a high percentage of
instrumentation successfully operated at and through shot time, recording
reliable data.
Blast data have been obtained which will supplement existing
information, These data will extend presently estublished curves, and will
strengthen the knowledge of blast phenomena in areas heretofore only
meagerly instrumented or not documented at all.
2.1.2
Program 2, Nuclear Radiation and Effects
Program 2 was concerned with tho distribution of radioactivity in the
cloud resulting from nuclear explosions and the subscquent fallout of mate-
rial from the cloud and with various nuclear radiation effects.
Gamma ion chambers were fired into the cloud by high-speed rockets
and the resulting gamma-rate data were telemetcred to recording stations.
Preliminary analysis indicates there is comparatively little activity in the
stem region and that cloud activity is in the lower portion of the cloud.
Destroyer escorts and the M/V Horizon were used to delineate the
fallout pattern over water and to study the nature of the transport and
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