May 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agusm.p13a..04g&link_type=abstract
American Geophysical Union, Spring Meeting 2009, abstract #P13A-04
Other
6035 Orbital And Rotational Dynamics, 6055 Surfaces, 6280 Saturnian Satellites
Scientific paper
We present a high-resolution global topography model (GTM) of Saturn's satellite Phoebe, derived from Cassini images taken during the flyby on June 11, 2004. The model is composed of about 1.57 million vectors and was synthesized from 523 maplets. Each maplet is a 99x99 pixel topography and albedo map constructed from the ensemble of images using stereophotoclinometry. The central point of each maplet is a control point. The 523 control points were determined from 22708 observations, about 43 per control point, and the RMS measurement residuals were about 180 meters per degree of freedom. The model has a volume of about 5 million cubic kilometers and a surface area of about 150000 square kilometers, so the model's resolution is about 300 m. The pole was determined from the set of control points to be at RA 356.86 +/- .02 degrees and DEC 77.878 +/- .004 degrees. This study is part of ongoing work on Saturn's satellites. We shall also present preliminary models for several other satellites, including Mimas, Enceladus, Iapetus and Tethys.
Gaskell Robert W.
Mastrodemos Nicholas
Rizk Bashar
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