~ey (FRIF) Project 5.7 - Thermal Flux and Albedo Measurements fror Aircraft tt, P. F. Harwerd OBJFCTIVE The objectiwa of this shot was to obtain thervmal flux and albedo informtion of a nuclear detonation with airborne calorimeters, radio-~ meters, afri sixteen millimeter motion picture cameras, INSTRORTATION Instrumentation within *he purwlew of Project 5.7 which was ine stallei in the 3-57 incluie! nineteen NRDL calorimeters and two VROL raiiometers for measuring the direct and surface reflected thermal radiation. These instruments possessed various fielis of view and were suitably ‘iltare? to ottatn qualitative spectral information, vraphic tstribition Six SSAP "~% cameras were utilized *o obtain photo- overage of the fireball, the earth's surface, and of clouds beneath tre aivcraft, Two :f the cameras oriented tawarde ground sero were equipped with spectrosecoic attachrents to obtain continucus spectra in the wisible rerio. Of the cther Swe tail position caneras, one caters had e blue filter ini the othe- Ned a ret filter for the purpose sf obtafning pictures at both extremes of the visibie region of the spectrum, The’ remaining two cagevas were oriente! wertica ly for the mrpose of obtaining chotographic coverage of the earth's surface ani of clouis beneath the eaircrefs, Instrumentation installe: dn the 44 conaststed of the basic twenty-one thermal instruments, and twelve cameras. POSIT @ Information of the position in space of seach aircraft fe contained BEST AVAILASLE COPY = 3 - COPE IOE a AS