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A new global control point network was derived for Enceladus, based on Cassini and Voyager-2 image data. Cassini images weretaken from 2005 to 2014, for Voyager we have only one flyby in the middle of 1981. We have derived 3D Cartesian coordinates for1128 control points as well as improved pointing data for 12 Voyager and 193 Cassini images in the Enceladus-fixed coordinatesystem. The point accuracies vary from 55 m to 2900 m (average point accuracy – 221 m). From tracking of the control points wedetect a librational motion described by a model which includes 3 different periods and amplitudes (Rambaux et al., 2011). Wedetermine the amplitudes for each term. Our new control point network has a higher number of point measurements and a higheraccuracy than previous data (Giese et al., 2014)

the international archives of the photogrammetry, remote sensing and spatial information sciences/international archives of the photogrammetry, remote sensing and spatial information sciences

A LIBRATION MODEL FOR ENCELADUS BASED ON GEODETIC CONTROL POINT NETWORK ANALYSIS