AERIAL PHOTO AND RADIOLOGICAL SURVEY PROGRAM
B.
RADIOLUGICAL SURVEY
The Aerial Radiation Surveys will be carried out by means of
helicopters SH-3G'sa which will fly multiple missions from the
USS WHEELING station”hear the atoll or in the lagoons when posa@ihle.
EG&G will supply the scientific Flight crews and technical suppprt
personnel to operate and maintain the radiation measuring and.
position measuring equipment.
The aerial radiation survey employs large arrays of NaI(Tl) sinkillation
detectors mounted on a halicopter platform.
Gamma radiation daka ts
accumulated continuously in a 300-channel multichannel analyzer] and
recorded on magnetic tape once each second.
Position informatifn
obtained from a microwave ranging aystem and a radar altimeter
also recorded on magnetic tape each second.
gre
The aircraft is fléwn
at an altitude of 100' on line spacing of 200'.
During the data reduction phase, radiation and position data ar
correlated on a.second-by-second basis and processed in the for
tadiation contours overlayed on aerial photographs.
of
The radiation
data are processed to provide total gamua ray exposure rate and
0
selected isotope (e.g., 241.3, 13765, and 6 Co) concentration cdntours.
A total of nine (9) personnel will be required to support the alive
program for each series.