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Wavelength calibration techniques and subtle surface and atmospheric absorption features in the Mariner 6, 7 IRS reflectance data1994 marks the 25th anniversary of the Mariner 6 and 7 flyby missions to Mars. Despite its age, the Mariner 6,7 Infrared Spectrometer (IRS) data are a unique set of measurements that can provide important information about the Martian surface, atmospheric, and atmospheric aerosol composition. For certain mid-IR wavelengths, the IRS spectra are the only such spacecraft data obtained for Mars. At other wavelengths, IRS measured surface regions different from those measured by Mariner 9 or Phobos 2 and under different dust opacity conditions. We are interested in examining the IRS reflectance data in the 1.8 to 3.0 micron region because there are numerous diagnostic absorption features at these wavelengths that could be indicative of hydrated silicate minerals or of carbonate- or sulfate-bearing minerals. Groundbased telescopic data and recent Phobos ISM measurements have provided controversial and somewhat contradictory evidence for the existence of mineralogic absorption features at these wavelengths. Our goal is to determine whether any such features can be seen in the IRS data and to use their presence or absence to re-assess the quality and interpretations of previous telescopic and spacecraft measurements.
Document ID
19940030899
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Bell, James F., III (NASA Ames Research Center Moffett Field, CA, United States)
Roush, T. L. (NASA Ames Research Center Moffett Field, CA, United States)
Martin, T. Z. (NASA Ames Research Center Moffett Field, CA, United States)
Pollack, James B. (NASA Ames Research Center Moffett Field, CA, United States)
Freedman, R. (NASA Ames Research Center Moffett Field, CA, United States)
Date Acquired
September 6, 2013
Publication Date
January 1, 1994
Publication Information
Publication: Lunar and Planetary Inst., The Twenty-Fifth Lunar and Planetary Science Conference. Part 1: A-G
Subject Category
Lunar And Planetary Exploration
Accession Number
94N35405
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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