Onboard Radiometric Photography of Excede Spectral’s Ejected-Electron Beam
A radiometrically-calibrated wide angle camera system was installed on EXCEDE SPECTRAL (O’Neil et al., 1981) to determine spatial distributions of energy deposition within and near the fields of view of its UV-visible-IR-sensitive instruments. High signal/noise, on-scale photographic images were obtained over the full range of electron injection altitudes. We describe here the cameras and film data reduction procedure, and present measured column emission rate distributions within a few 10’s m from the rocket between 123 and 85 km. These are found to differ considerably from predictions of an independent particle transport model.
KeywordsAutomatic Gain Control Suprathermal Electron Radiance Distribution Volume Emission Rate Inject Electron Beam
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