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.