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Comparison between infrared Martian disk spectra and optical properties of terrestrial analogsMedium spectral resolution (20 kaysers) infrared measurements of the Martian disk made between 2900 and 5600 kaysers from the NASA Lear Airborne Observatory have been successfully compared with predictions derived from a model of the Martian soil and atmosphere. Modeling of the Martian atmosphere permitted the extraction of Martian soil reflectance in the CO2 bands centered at 3657 kaysers. Three Martian soil analogs previously considered acceptable - limonite, montmorillonite, and basalt - were analyzed to determine the optical complex indices of refraction in the same range as the airborne observations, for mathematical modeling. A characteristic surface particle size approximately 1 to 3 microns diameter is indicated. It is concluded that the Martian soil surface near-infrared optical properties are consistent with a soil composition similar to montmorillonite or limonite, mixed with a basalt.
Document ID
19780065322
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Egan, W. G.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Hilgeman, T.
(Grumman Aerospace Corp. Bethpage, NY, United States)
Smith, L. L.
(Grumman Aerospace Corp. Bethpage, N.Y., United States)
Date Acquired
August 9, 2013
Publication Date
August 1, 1978
Publication Information
Publication: Icarus
Volume: 35
Subject Category
Lunar And Planetary Exploration
Accession Number
78A49231
Funding Number(s)
CONTRACT_GRANT: NAS2-8664
Distribution Limits
Public
Copyright
Other

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