Initial Results from the Mini-TES Experiment in Gusev Crater from the Spirit Rover-Reference-Cited by-同舟云学术

Initial Results from the Mini-TES Experiment in Gusev Crater from the Spirit Rover

Published:2004-08-06 Issue:5685 Volume:305 Page:837-842
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Christensen P. R.¹²³⁴⁵,Ruff S. W.¹²³⁴⁵,Fergason R. L.¹²³⁴⁵,Knudson A. T.¹²³⁴⁵,Anwar S.¹²³⁴⁵,Arvidson R. E.¹²³⁴⁵,Bandfield J. L.¹²³⁴⁵,Blaney D. L.¹²³⁴⁵,Budney C.¹²³⁴⁵,Calvin W. M.¹²³⁴⁵,Glotch T. D.¹²³⁴⁵,Golombek M. P.¹²³⁴⁵,Gorelick N.¹²³⁴⁵,Graff T. G.¹²³⁴⁵,Hamilton V. E.¹²³⁴⁵,Hayes A.¹²³⁴⁵,Johnson J. R.¹²³⁴⁵,McSween H. Y.¹²³⁴⁵,Mehall G. L.¹²³⁴⁵,Mehall L. K.¹²³⁴⁵,Moersch J. E.¹²³⁴⁵,Morris R. V.¹²³⁴⁵,Rogers A. D.¹²³⁴⁵,Smith M. D.¹²³⁴⁵,Squyres S. W.¹²³⁴⁵,Wolff M. J.¹²³⁴⁵,Wyatt M. B.¹²³⁴⁵

Affiliation:

1. Department of Geological Sciences, Arizona State University, Tempe, AZ 85287, USA.

2. Department of Earth and Planetary Sciences, Washington University, St. Louis, MO 63130, USA.

3. Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, USA.

4. Department of Geological Science, University of Nevada Reno, NV 89557, USA.

5. Institute of Geophysics and Planetology, University of Hawaii, Honolulu, HI 96822, USA.

Abstract

The Miniature Thermal Emission Spectrometer (Mini-TES) on Spirit has studied the mineralogy and thermophysical properties at Gusev crater. Undisturbed soil spectra show evidence for minor carbonates and bound water. Rocks are olivinerich basalts with varying degrees of dust and other coatings. Dark-toned soils observed on disturbed surfaces may be derived from rocks and have derived mineralogy (Â±5 to 10%) of 45% pyroxene (20% Ca-rich pyroxene and 25% pigeonite), 40% sodic to intermediate plagioclase, and 15% olivine (forsterite 45% Â±5 to 10). Two spectrally distinct coatings are observed on rocks, a possible indicator of the interaction of water, rock, and airfall dust. Diurnal temperature data indicate particle sizes from 40 to 80 Î¼m in hollows to â¼0.5 to 3 mm in soils.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference54 articles.

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3. Two-point radiometric calibration was intended to use two V-groove blackbody targets ( 2 ). The temperature sensors attached to the rover deck failed at extremely low temperatures (â¼â90Â°C) on the first night after landing. The calibration was modified to use prelaunch measurements of the instrument response function taken over temperature with the instrument radiance determined from observations of the functioning target mounted in the Pancam mast assembly (PMA). On the basis of comparison with orbiting MGS TES data and modeling of the atmospheric observations the response function has not changed from prelaunch values and the calibration approach is providing the required accuracy. The 1-Ï radiometric precision for two-spectra summing is Â±1.8 Ã 10 â8 W cm â2 sr â1 cm â1 between 450 and 1300 cm â1 increasing to â¼7 Ã 10 â8 W cm â2 sr â1 cm â1 at shorter (300 cm â1 ) and longer (1800 cm â1 ) wave numbers. The absolute radiance error is <5 Ã 10 â8 W cm â2 sr â1 cm â1 decreasing to â¼1 Ã 10 â8 W cm â2 sr â1 cm â1

4. The Spirit Rover's Athena Science Investigation at Gusev Crater, Mars

5. Pancam Multispectral Imaging Results from the Spirit Rover at Gusev Crater

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