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Proceedings Paper

Data processing system for the Near-Earth Asteroid Rendezvous (NEAR) x-ray and gamma-ray spectrometer (XGRS) ground system
Author(s): Timothy Patrick McClanahan; Irina Mikheeva; Jacob I. Trombka; Samuel R. Floyd; William V. Boynton; H. Bailey; Jasbir Bhangoo; Richard D. Starr; Pamela E. Clark; Larry G. Evans; Steven W. Squyres; Elaina McCartney; E. Noe; Ralph L. McNutt; Johannes Brueckner
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Paper Abstract

An x-ray and gamma-ray spectrometer (XGRS) is onboard the Near Earth Asteroid Rendezvous (NEAR) spacecraft to determine the elemental composition of the surface of the asteroid 433 Eros. The Eros asteroid is highly non-spherical in physical shape and the development of data management and analysis methodologies are in several areas a divergence from traditional remotely sensed geographical information systems techniques. Field of view and asteroid divergence from traditional remotely sensed geographical information system techniques. Field of view and asteroid surface geometry must be derived virtually and then combined with real measurements of solar, spectral and instrument calibration information to derive meaningful scientific results. Spatial resolution of planned geochemical maps will be improved from the initial conditions of low statistical significance per integration by repeated surface flyovers and regional spectral accumulation. This paper describes the results of a collaborative effort of design and development of the NEAR XGRS instrument ground system undertaken by participants at the Goddard Space Flight Center, University of Arizona, Cornell University, Applied Physics Laboratory, and Max Planck Institute.

Paper Details

Date Published: 19 October 1999
PDF: 14 pages
Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); doi: 10.1117/12.366572
Show Author Affiliations
Timothy Patrick McClanahan, NASA Goddard Space Flight Ctr. (United States)
Irina Mikheeva, Univ. of Arizona (United States)
Jacob I. Trombka, NASA Goddard Space Flight Ctr. (United States)
Samuel R. Floyd, NASA Goddard Space Flight Ctr. (United States)
William V. Boynton, Univ. of Arizona (United States)
H. Bailey, Univ. of Arizona (United States)
Jasbir Bhangoo, Univ. of Arizona (United States)
Richard D. Starr, Catholic Univ. of America (United States)
Pamela E. Clark, Catholic Univ. of America (United States)
Larry G. Evans, Computer Sciences Corp. (United States)
Steven W. Squyres, Cornell Univ. (United States)
Elaina McCartney, Cornell Univ. (United States)
E. Noe, Cornell Univ. (United States)
Ralph L. McNutt, Johns Hopkins Univ. (United States)
Johannes Brueckner, Max-Planck-Institut fuer Chemie (Germany)


Published in SPIE Proceedings Vol. 3768:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics
Ralph B. James; Richard C. Schirato, Editor(s)

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