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Proceedings Paper

Satellite observations and instrumentation for imaging energetic neutral atoms
Author(s): Henry D. Voss; Joseph Mobilia; Henry L. Collin; William L. Imhof
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Paper Abstract

Direct measurements of energetic neutral atoms (ENA) and ions have been obtained with the cooled solid state detectors on the low altitude (220 km) three-axis stabilized S81-1/SEEP satellite and on the spinning 400 km X 5.5 Re CRRES satellite. During magnetic storms ENA and ion precipitation (E > 10 keV) is evident over the equatorial region from the LE spectrometer on the SEEP payload (ONR 804). The spinning motion of the CRRES satellite allows for simple mapping of the magnetosphere using the IMS-HI (ONR 307-8-3) neutral spectrometer. This instrument covers the energy range from 20 to 1000 keV and uses a 7 kG magnetic field to screen out protons less than about 50 MeV. ENA and the resulting low- altitude ion belt have been observed with the IMS-HI instrument. Recently, an advanced spectrometer (SEPS) has been developed to image electrons, ions, and neutrals on the despun platform of the POLAR satellite (approximately 1.8 X 9 Re) for launch in the mid-90's as part of the NASA ISTP/GGS program. For this instrument a 256 element solid state pixel array has been developed that interfaces to 256 amplifier strings using a custom 16 channel microcircuit chip. In addition, this instrument features a motor controlled iris wheel and anticoincidence electronics.

Paper Details

Date Published: 1 June 1992
PDF: 12 pages
Proc. SPIE 1744, Instrumentation for Magnetospheric Imagery, (1 June 1992); doi: 10.1117/12.60582
Show Author Affiliations
Henry D. Voss, Lockheed Palo Alto Research Lab. (United States)
Joseph Mobilia, Lockheed Palo Alto Research Lab. (United States)
Henry L. Collin, Lockheed Palo Alto Research Lab. (United States)
William L. Imhof, Lockheed Palo Alto Research Lab. (United States)

Published in SPIE Proceedings Vol. 1744:
Instrumentation for Magnetospheric Imagery
Supriya Chakrabarti, Editor(s)

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