personnel,
Four (4) gauges were installed at each test site.
Reduction of data
the shot.
and plotting of curves were accomplished within 48 hours after
The gauge
‘{tself proved satisfactory and will be valuable for fiture tests,
5,
RADAR SCOPE PHOTOGRAPHY
The object of this portion of the program was to obtain photographs of
of
radar scopes during the atomic explosion for aniiysis and evaluation as a mothod
measuring bombing accuracy and estimating bomb damage,
Pictures were taken of A and
B scopes of the AN/APQe2h radars on two (2) B-5ODs for "DOG", "EASY" and "GRORGE"
shots,
Equipment operated satisfactorily and excellent pictures were obtained,
Radarreturns, about 15 decibels above background, moved with approximately the velocity of sound,
These served to positively locate ground zero.
This is a low level
phenomenon and is almost certainly closely related to humidity, and possibly to turbulence,
It is doubtful whether total energy can be determined with the present
technique since the velocity of the shock wave cannot be measured with sufficient
accuracy in the early stages.
Whether the present technique can be adapted to de-
termination of ground zero in other localities will depend on the results of continued experimentation on tests at continental sites,
‘The film from the GREENHOUSE
tests is still boing studicd at the Air Material Conmand in collaboration with the
Operation Analysis Section of Headquarters, USAF, and finel conclusions will be
available in a short time,
6.
MEASUREMENT OF EFFECTS GF ATOJXPLOGTONS GN RADIO PROPAGATION
The object of this portion of the program was to find what effects, is any,
occurred in the transmission and reception of radar and radio waives, both direct and
reflected, during and after an atomic explosion,
are blast, radiation and ionimation,
and "GEORGE" shots,
Possible sources of interference
These tests were concucted on "DOG", "EASY"
Both short range (within the atoll arca} and long range (as far
as JAPAN and HAWAII) radios were monitored by recorders,
made by the National Bureau of Standards,
Jonspheric studies were
All equipment operated satisfactorily and
data are being analyzed and evaluated by the Signal Corps and the National Bureau of
- Standards at the present time.
No conclusions or recommendations can be made at thi:
time.
7,
AERIAL PHOTOGRAPHIC DAMAGE STUDY
This test was designed to check photographie interpretation of damage again:
actual damage caused by an atomic explosion,
This was accomplished by taking photo-~
graphs, both vertical and oblique, of the main buildings of the structures program
vo
és
<<
RTT AE ,
&
ot
PRas
a = we
14k
erpay pecngy aot: ia