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The effects of atmospheric pressure on infrared reflectance spectra of Martian analogsThe use of terrestrial samples as analogs of Mars soils are complicated by the Martian atmosphere. Spectral features due to the Martian atmosphere can be removed from telescopic spectra of Mars and ISM spectra of Mars, but this does not account for any spectral differences resulting from atmospheric pressure or any interactions between the atmosphere and the surface. We are examining the effects of atmospheric pressure on reflectance spectra of powdered samples in the laboratory. Contrary to a previous experiment with granite, no significant changes in albedo or the Christiansen feature were observed from 1 bar pressure down to a pressure of 8 micrometers Hg. However, reducing the atmospheric pressure does have a pronounced affect on the hydration features, even for samples retained in a dry environment for years.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Bishop, Janice L.
(Brown Univ. Providence, RI, United States)
Pieters, Carle M.
(Brown Univ. Providence, RI, United States)
Pratt, Stephen F.
(Brown Univ. Providence, RI, United States)
Patterson, William
(Brown Univ. Providence, RI, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Lunar and Planetary Inst., Twenty-fourth Lunar and Planetary Science Conference. Part 1: A-F
Subject Category
Lunar And Planetary Exploration
Accession Number
Funding Number(s)
Distribution Limits
Work of the US Gov. Public Use Permitted.

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