Computer Science
Scientific paper
Apr 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009eguga..11.2697t&link_type=abstract
"EGU General Assembly 2009, held 19-24 April, 2009 in Vienna, Austria http://meetings.copernicus.org/egu2009, p.2697"
Computer Science
Scientific paper
We present our current best results for Saturn's gravity field obtained by analyzing Cassini's data acquired during two flybys carried out during the nominal mission (September 2006 and May 2008) and the first flyby of the Equinox Mission (November 2008). An additional radio science flyby is planned in the Equinox Mission and more are under consideration for the End of Life mission, following the Solstice Mission. The Cassini Radio Science Team has already determined the coefficients J2, J4 and J6 with great accuracy using X-band Doppler data and the standard Earth tropospheric calibrations. In addition, during gravity field determination experiments, two and three-way Doppler data are acquired both at X- and Ka-band at the three complexes of the NASA's Deep Space Network, along with precise Earth tropospheric calibration data. We show the three independent solutions for Saturn's gravity field obtained from each flyby and the combined, multiarc solution which allows the estimation of a single, consistent gravity field with smaller uncertainties in the harmonic coefficients.
Ardito A.
Armstrong John W.
Asmar Sami W.
Graziani Andrea
Iess Luciano
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