Classification of surface units in the equatorial region of Mars based on Viking Orbiter color, albedo, and thermal data

Details Classification of surface units in the equatorial region of Mars based on Viking Orbiter color, albedo, and thermal data Classification of surface units in the equatorial region of Mars based on Viking Orbiter color, albedo, and thermal data

Nov 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....8710149a&link_type=abstract

(International Colloquium on Mars, 3rd: Dedicated to Thomas A. Mutch /1931-1980/, Pasadena, CA, Aug. 30-Sept. 2, 1982.) Journal

Physics

18

Mars Surface, Planetary Geology, Planetary Mapping, Viking Orbiter Spacecraft, Albedo, Clumps, Color, Correlation Coefficients, Eigenvalues, Equatorial Regions, Thermal Mapping

Scientific paper

Clusters corresponding to mappable surface units are sought in Viking Orbiter color, albedo, and thermal inertia data for the equatorial region of Mars. A principal components analysis indicated that 84% of the variance within the data for this region can be carried along two vector directions which typify the dominant trend of Martian surface materials. These dominant trends were deemphasized by stretching the data from a five-dimensional elliptical swarm into a hypersphere, through the use of principal component techniques. The decorrelated data were then plotted in a triangle diagram with red/violet, albedo and thermal inertia apices to facilitate inherent cluster discrimination. As many as eight clusters can be identified, with important mixing between them. The three major clusters consist of red and grey material extremes, along with intermediate value materials.

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