wit ty nam (zu"z) Profcet 8.1 - Basic Thermal Ratiation Mcasurem=nts - W. B. Plum QRITECTIVE The objective of this project was to measure the time history of irradiance, thermal raiiant energy, and the spectral distribution of radiant energy from three stations with a time resolution of 20 msec; and the drradiance and spectral distribution of irradiance from two stations with a time resolution of 59 microseccnds., From these data it will be possible to obtain a general transmission coetfickent for the atmosphere, transmission coefficients for the atmosrhere for narrow wavelength bands, scattering cacfficients as a function of the field of view, and the partition of energy between the first and second thermal pulses, INSTRIMONTATION Three stations were instrumented for this shot. “hiecrete, 32,077 ft Station 812,01 on from G73 Station 819,03 on Airukiiji, 16,900 ft from G2; and Stations 813.714 at the 200 ft level on Enyuw and Station 813,C1B en top of the instrument trailer, 68,700 ft from GZ. ellorimeters, listed below, were used on this shot. NRDL radiometers and Duplicate instruments consisting of 11 calorimeters and 1 radiometer were connected to each Hefland oscilloscraphic recorder, Two reecrders were used at each stetion. (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 decree field of view (4) Spectral, 2-58 filter, (5) Spectral, RG-8 filter, 9 - 85 - bade | fan) be > P) m ~ 4 D % my oO ¢ Oo 9C degree field of view of view

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