Wa a. -~—+ we a wo oF Project 5,7 ~ Thermal Flux and Albedo Measurements from Aircraft Capt R. L. Dresser OBJECTIVE The objective of this shot was to obtain thermal flux and albedo information of a nuclear detonation with airborne calorimeters, radiometers, and sixteen mm motion picture cameras, INSTRUMENTATION Instrumentation within the purview of Project 5.7 which was installed in the B-47 included nineteen NRDL calorimeters and two NRDL radiometers for measuring the direct and surface reflected thermal radiation, 4 Six calorimeters were utilized to measure thermal radiation which was back-scattered toward the cockpit. Seven GSAP N-9 cameras were utilized to obtain photographic coverage of the fireball, the earth's surface, and of clouds beneath the aircraft, and also of any reflecting surface such as a cloud which could contribute to the back-scattered radiation, Project 5.7 instrumentation on the B-52 included the basic 21 instru- ments for thermal radiation measurements, but only an additional two instruments were utilized for back-scatter measurements. cameras Eight GSAP were installed for photographic coverage. Project 5.7 instrumentation on the B-57 consisted of the basic twenty one instruments and six cameras, Project 5.7 instrumentation on the B-66 consisted of the basic twenty one instruments and twelve cameras. Neither tactical bomber (B-66, B-57) was instrumented for measuring é . o “bog - ath 7 . ~ 62 : _ lyr ,