ee4 ma 4 Project 8.5-- Airborne High Resolution Spectral Analysis - Ralph Zirkind OBJECTIVE To determine the spectral distribution of the irradiation of an airburst megaton device at an airborne station and compare identical measurement from a surface station, with an Also, the fireball color temperature is to be determined by utilizing transmission data based on a statistical analysis of simulated runs. INSTRUMENTATION The spectral distribution of irradiance is obtained from a medium quartz Hilger Spectrometer. The spectrum is sampled in narrow bands by photocells in the visible region and PbS cells in the infra-red. The electrical signal of known output and spectral distribution froma fixed point on the ground towards the aircraft. The attenuated beam is received by a detector in the aircraft and recorded on a Heiland recorder, The detector consists of two filtered photo-multiplier tubes sampling two spectral regions, (1) .3-.55 microns and (2) .6-1.05 microns. In addition, a quartg filtered calorimeter, 22 degrees field of view, is utilized to measure the approximate radiant exposure received at the spectrometer. RESUITS The aircraft was located at the planned position. established (The P2V a race-track pattern south of GZ (oriented 106° ~ 286°r) at 23,000 feet absolute; broke and proceed in-bound on a heading of 106°T, to be in a tail-on position at To, with a horizontal range of 92,620 feet). sale *