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Proceedings Paper

Global spectroscopy and imaging of atmospheric x-ray bremsstrahlung: instrumentation and initial results from the PEM/AXIS instrument aboard the upper-atmosphere research satellite
Author(s): David L. Chenette; Dayton W. Datlowe; William L. Imhof; T. L. Schumaker; J. D. Tobin
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Paper Abstract

The Atmospheric X-ray Imaging Spectrometer (PEM/AXIS) aboard NASA's Upper Atmosphere Research Satellite (UARS) provides continuous horizon to horizon images, both day and night, of the 3to 100-keY x-ray flux emitted from the top of the atmosphere. AXIS achieves a spatial resolution to better than 100 km using a 1—dimensional array of 16 passively cooled silicon detectors. The primary purpose of this instrument is to provide a global monitor of electron energy input to the upper atmosphere. The intensity and energy distribution of electrons precipitating into the atmosphere can be inferred from the x-ray bremsstrahlung spectra. The resulting images and spectra are also a rich source of information on the structure and dynamics of the magnetosphere. AXIS is part of the Particle Environment Monitor (PEM) investigation on UARS, launched 12 September 1991 into a 585km by 57° inclination orbit. We describe the design, development, and calibration of AXIS and provide an assessment of its excellent on-orbit performance. The unique capabilities of x-ray imaging spectrometers are demonstrated through an analysis of specific examples from October and November 1991 .Important new developments for follow-on instruments also will be described.

Paper Details

Date Published: 29 June 1992
PDF: 10 pages
Proc. SPIE 1745, Instrumentation for Planetary and Terrestrial Atmospheric Remote Sensing, (29 June 1992); doi: 10.1117/12.60596
Show Author Affiliations
David L. Chenette, Lockheed Palo Alto Research Lab. (United States)
Dayton W. Datlowe, Lockheed Palo Alto Research Lab. (United States)
William L. Imhof, Lockheed Palo Alto Research Lab. (United States)
T. L. Schumaker, Lockheed Palo Alto Research Lab. (United States)
J. D. Tobin, Lockheed Palo Alto Research Lab. (United States)


Published in SPIE Proceedings Vol. 1745:
Instrumentation for Planetary and Terrestrial Atmospheric Remote Sensing
Supriya Chakrabarti; Andrew B. Christensen, Editor(s)

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