= AGa V = Project 2.64 ~ Fallout Location and Delineation by Aerial Syrvey R. Graveson OBJECTIVES Participation in this shot was scheduled to obtain data which could be used to validate altitude absorption calculations, These air absorption factors ere used to compensate aircreft dose rate readings to an equivalent surface reading. OPERATION PLAN This additional project participation was requested and approved in June 1956, and was based on non-interference with the major (Navajo) operations scheduled soon after this shot. Dtl: One project aircraft was requested for 0900 arrival at Eniwetok, After installaticn of the project equipment an eerial survey was scheduled (to include one pass over the islands in the atoll, three passes over the lagoon, and an area search over the open sea out to 100 miles). D+2: The aircraft was scheduled to rendezvous at Eniwetok and repeat the open sea survey if warranted by the results on the previous day. All plotting and flight planning was to te done in the aircraft by two project passengers. The flight plotting, rather than a central plot control was possible since close correlation tetween more than one aircraft and also between aircraft and ship elements was not recuired. A helicopter was scheduled for D+2 to perform surveys over two islands and open water at varying flight altitudes between 25 and 1,000 feet. A gamma spectrum anelyzer and special survey meters were to be installed for these measurements of altitude absorption coefficients. ~19-