om Project @.2-- Basic Thermal Radiation Measurements - W. B, Plum OBJECTIVE The objective of this project was to measure the time history of irradiance, thermal radiant energy, and the spectral distribution of thermal radiant energy from three stations with a time resolution of 20 msec; the irradiance and spectral distribution of irradiance from two stations with a time resolution of 50 microseconds, From these data it was expected to get a general transmission coefficient for the atmosphere, the transmission coefficients for the atmosphere for narrow wavelength bands, scattering coefficients as a function of the field of view, and the partition of energy between the first and 4 second thermal pulses, INSTRUMENTATION Three stations were instrumented for this shot. Station 810.01 on Yurochi (DOG), 34,940 feet from GZ; Station 811.01 on Aomoen (GEORGE), 48,979 feet from GZ; and Station 811.02 on Bikini (HOW), 92,628 feet from GZ. NRDL radiometers and calorimeters, listed below were used at each station. Two recorders were used at each station. Duplicate in- struments consisting of 11 calorimeters and one radiometer were connected to each Heiland oscillographic recorder. COPIED/DOE LANL RC (1) Total energy, quartz filter, 90 degree field of view (2) Total energy, quartz filter, 90 degree field of view (3) Spectral, 3-69 filter, 90 degree field of view (4) Spectral, 2-58 filter, 90 degree field of view (5) Spectral, RG-8 filter, 90 degree field of view (6) Spectral, 7-56 filter, 90 degree field of view (7) Field of view, quartz filter, 11 degree field of view i i