Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21..353m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 21, no. 5, p. 353-356
Astronomy and Astrophysics
Astronomy
59
Infrared Astronomy, Mars (Planet), Mineralogy, Planetary Surfaces, Reflectance, Absorption Spectra, Error Analysis, Imaging Spectrometers, Space-Time Functions, Spatial Resolution, Mars, Reflectance, Spectra, Comparison, Shape, Absorption, Wavelength, Position (Location), Telescope Methods, Visible Light, Near-Infrared, Earth-Based Observations, Spectroscopy, Spacecraft Observations, Procedure, Phobos 2 Mission, Ism Instrument, Surface, Features, Mafic Material, Volcanics, Oxidation, Weathering
Scientific paper
To verify the quality and accuracy of Phobos-2 Imaging Spectrometer for Mars (ISM) spectra of Mars, we have performed comparisons with telescopic data obtained contemporaneously and which have spatial and spectral overlap with the ISM measurements. We find general agreement between the independently-calibrated data sets in terms of spectral shape and absorption band strength and position in the 0.77 to 0.93 micron overlap region. The telescopic data were scaled to the ISM reflectance values in this overlap region to yield new bright and dark region composite reflectance spectra from 0.40 to 3.14 microns. We ascribe the increase in band depth and overall spectral heterogeneity of the ISM data relative to previous telescopic observations to the more than order of magnitude increase in spatial resolution achieved by ISM from Martian orbit. Further increases in spatial resolution from future orbital imaging spectroscopic instruments can be expected to reveal even greater degrees of compositional and mineralogic diversity on Mars.
Bell Jon F.
Mustard John F.
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