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Ganymede: radar surface characteristics.

R M Goldstein, R R Green

    Science (New York, N.Y.)
    |January 11, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Radar observations reveal Ganymede

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    Area of Science:

    • Planetary Science
    • Astronomy
    • Surface Physics

    Background:

    • Ganymede, Jupiter's largest moon, exhibits unique surface characteristics.
    • Previous studies have noted anomalies in Ganymede's reflectivity.

    Purpose of the Study:

    • To investigate the unusual brightness and polarization properties of Ganymede's surface.
    • To develop a model explaining these observed radar characteristics.

    Main Methods:

    • Analysis of X-band radar observations of Ganymede.
    • Development of a surface scattering model.

    Main Results:

    • Ganymede's surface displays unexpectedly high brightness.
    • Distinctive polarization signatures were detected.
  • A model involving numerous random ice facets (vacuum-ice interfaces) successfully replicates the observations.

    • Conclusions:

    • The surface of Ganymede is characterized by a high density of randomly oriented ice facets.
    • This micro-scale surface structure explains the observed anomalous radar properties.