High resolution albedo measurements on Io from Voyager 1

Details High resolution albedo measurements on Io from Voyager 1 High resolution albedo measurements on Io from Voyager 1

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981jgr....86.8627c&link_type=abstract

Journal of Geophysical Research, vol. 86, Sept. 30, 1981, p. 8627-8634.

Physics

15

Albedo, Io, Planetary Composition, Sulfur Dioxides, Visual Photometry, Voyager 1 Spacecraft, Allotropy, High Resolution, Limb Darkening, Satellite-Borne Photography, Spectral Reflectance, Jupiter, Voyager 1, Satellites, Io, Albedo, Photometry, Properties, Surface, Colors, Photometric Observations, Intensity, Scattering, Data, Distribution, Composition, Mixing, Regions, Darkening, Limbs, Sulfur, Reflectance, Comparisons, Sulfur Dioxide, Analysis, Procedure, Latitude, Photographs

Scientific paper

The photometric properties of the Io surface were investigated at high spatial resolution from the four-color, 8 km/line pair resolution photomosaic taken by Voyager 1. Regions categorized on the basis of visual color include white, yellow, orange, red, brown and black regions. Data were plotted as a function of intensity versus photometric angles for each of the color regions using a Minnaert function. A large scatter on the darker regions indicates a continuous distribution of albedos on Io and gives evidence of compositional mixing. Limb darkening coefficients are found for the white and brown regions, and color ratio plots of the reflectances are constructed. Distribution of ratios of the various color regions are compared to laboratory measurements of solid SO2 and various allotropes of sulfur, which indicate that SO2 is the major component of the white regions.

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