Physics – Optics
Scientific paper
Jul 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977icar...31..293m&link_type=abstract
Icarus, vol. 31, July 1977, p. 293-314.
Physics
Optics
6
Astronomical Photometry, Imaging Techniques, Mars Surface, Atmospheric Optics, Data Reduction, Dust Storms, Petrology, Spectrophotometry, Vidicons, Water Vapor
Scientific paper
The paper discusses imaging of Mars at 20 wavelengths in the spectral region from 0.35 to 1.10 microns performed during the 1973 opposition with a photometric imaging system that uses a silicon vidicon tube as the detector. The imaging system and data-reduction procedures are described in detail, and relative reflectance spectra for several small areas in the images are presented along with vidicon images obtained during early phases in the development of the 1973 dust storms. Several anomalous blue brightenings are examined and attributed to ground fog and H2O frost. It is suggested that anomalously large amounts of H2O were pulsed into the atmosphere from the regolith by the storm system. An apparent fading and recession of the north polar hood is noted, surface units revealed in contrast-enhanced ratio images are identified, and the need for higher-spatial-resolution orbital spectroscopy of dark areas is emphasized.
Huguenin Robert L.
Johnson G. L.
McCord Th. B.
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