ay DREGEhone Project 5.7 - Thermal Flux and Albedo Measurements from Aircreft Capt R. L. Dresser OBJECTIVE The objective of Project 5.7 participation on this shot was to obtain thermal flux and altedo information of a nuclear detonation with airborne calorimeters, radiometers, and sixteen millimeter motion picture cameras. INSTRULENTATION Instrumentation within the province of Project 5.7 which was installed in the B-47 included 19 NADL celorimeters and two NRDL radiometers for measur- ing the direct and surface reflected thermal rediation. Six additional calorimeters were utilized to measure thermal rediation which was backscattered toward the cockpit. Seven GSAP N-9 cameras were utilized to obtain photographie 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 21 besic instruments for thermal radiation measurements, but only an additional two instruments were utilized for beck-scatter measurements. Eight GSAP cameras were utilized for photographie coverage. Project 5.7 instrumentation on the B-57 consisted of the basic 21 instruments and six cameras. Project 5.7 instrumentation on the 5-66 consisted of the basic 21 instruments and 12 cameras. Neither tactical bomber (B-66, B-57) was instrumented for measuring backscattered thermal radiation, The 21 basic thermal instruments possessed een !De ibis. RC -l5 = u 2