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Bruce Murray Space Image Library

Color processing of Galileo global images of Ganymede

Color processing of Galileo global images of Ganymede
Color processing of Galileo global images of Ganymede Two different global views of Ganymede's trailing side acquired by the Galileo SSI are presented here: One produced by the German Aerospace Center (DLR; left), and the other produced by unmannedspaceflight.com user OWW (right). In the view on the left, which is a composite of images taken with green, violet, and 1 micrometer filters, the colors are enhanced to emphasize color differences. The enhancement reveals frosty polar caps in addition to the two predominant terrains on Ganymede: bright, grooved terrain and older, dark furrowed areas. The global mosaic on the right combines high- and low-resolution images to create a view with more fine-scale detail. The mosaics are both centered at 306°W at a resolution of 9 kilometers (6 miles) per pixel, and north is up. The images in the DLR mosaic were taken on 29 March 1998 at a range of 918,000 kilometers (570,000 miles). NASA / JPL / DLR / OWW