Computer Science
Scientific paper
Jul 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993icar..104...69c&link_type=abstract
Icarus (ISSN 0019-1035), vol. 104, no. 1, p. 69-78.
Computer Science
22
Callisto, Infrared Spectra, Planetary Composition, Satellite Surfaces, Spectrum Analysis, Absorption Spectra, Clays, Ice, Infrared Absorption, Reflectance
Scientific paper
Recent spectral observations of both the leading and trailing hemispheres of Callisto confirm the conclusions of Calvin and Clark (1991) that the water ice is typically large-grained, and the general spectral trend from 3 to 43 microns is caused by an adsorbed water band associated with hydrous minerals. On the leading hemisphere, a broad absorption near 3.4 microns was definitively identified and interpreted as being caused by fine-grained water ice. This band, coupled with the slope in the region from 2 to 2.5 microns, is indicative of a small amount, on the order of 1 to 2 percent, of fine-grained ice on the leading side. It is suggested that in the longer wavelength spectral region on the leading hemisphere an additional band correlated with NH4-bearing clays may be indicated.
Calvin Wendy M.
Clark Roger Nelson
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