Statistics
Scientific paper
Aug 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3615204s&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 15, CiteID L15204
Statistics
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Geochemistry: Composition Of The Moon, Geochemistry: Composition Of The Moon, Geochemistry: Composition Of The Moon (6022, 8136), Geochemistry: Composition Of The Moon
Scientific paper
Limited Galileo-derived topographic mapping of four major terrain types on Europa provides slope characteristics useful for designing spacecraft instruments and for terrain comparisons. Topographic data are derived using stereo and photoclinometric analysis of Galileo images at resolutions of 10 to 200 m (with a few sites sampled at ˜500 m resolution). Similar data are also presented for dark and bright terrains on Ganymede as well as preliminary results for polar terrains on Enceladus. RMS slopes for ridged plains, matrix, and crater deposits on Europa are typically between 10 and 15° at 10-100 m length scales, significantly steeper overall than typical landing sites on Mars. Terrains on Ganymede may be even rougher. Smooth dilational bands on Europa, however, have RMS slopes of ˜5°, the shallowest slope statistics of any major terrain type on Europa. Aside from these areas almost no smooth areas larger than a few kilometers across occur on Europa.
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