Cruise measurements taken with the near XGRS

  • R. Starr
  • , P. E. Clark
  • , L. G. Evans
  • , S. R. Floyd
  • , T. P. McClanahan
  • , J. I. Trombka
  • , W. V. Boynton
  • , S. Bailey
  • , J. Brückner
  • , S. W. Squyres
  • , J. O. Goldsten
  • , R. L. McNutt

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

The X-ray/Gamma-ray Spectrometer on the Near Earth Asteroid Rendezvous spacecraft will remotely detect characteristic x-ray and gamma-ray emissions from the surface of 433 Eros to develop global maps of the elemental composition of the asteroid surface. Solar excited x-ray fluorescence in the 1 to 10 keV range will be used to measure the surface abundances of Mg, Al, Si, Ca, Ti, and Fe with spatial resolutions down to 2 km. Gamma-ray emissions in the 0.1 to 10 MeV range will be used to measure cosmic-ray excited emissions from such elements as O, Si, Fe, and H as well as naturally radioactive elements K, Th, and U to surface depths on the order of 10 cm. In-flight calibrations are essential to the understanding and analysis of data collected at Eros.

Original languageEnglish (US)
Pages (from-to)1159-1162
Number of pages4
JournalAdvances in Space Research
Volume24
Issue number9
DOIs
StatePublished - 1999

ASJC Scopus subject areas

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • General Earth and Planetary Sciences

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