Multispectral behaviour and mixing model simulations of EUROPAN terrains from Galileo images

Astronomy and Astrophysics – Astronomy

Scientific paper

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Europa, Terrain Analysis, Galileo Spacecraft, Satellite Imagery, Icy Satellites, Spectrum Analysis, Mathematical Models, Multispectral Band Scanners, Astronomical Photometry

Scientific paper

Multispectral imagery of Europa's north polar region have been photometrically corrected and spectra extracted from distinct Europa terrains. It is found that the 'darkest' materials on Europa lie along the triple bands and that the brightest materials lie among the icy bright plains. Using these extreme terrains as end members, a linear mixing model is used to reproduce the spectral behavior of Europa's intermediate terrains. Preliminary results indicate that simple linear mixing of the brightest and darkest material spectra can, in most cases, explain adequately the spectral behavior of Europa's mottled and dark spot terrains to within 5 percent.

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