Physics
Scientific paper
Dec 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufm.p21b0378y&link_type=abstract
American Geophysical Union, Fall Meeting 2002, abstract #P21B-0378
Physics
5734 Magnetic Fields And Magnetism, 6220 Jupiter
Scientific paper
While Galileo completed over 30 orbits of Jupiter to date, many of these orbits are not useful by themselves for determining higher order multipoles because of data gaps that limit longitudinal coverage. In the past we have used condition number quality analysis to evaluate the relative accuracy of solutions based on coverage. In this work, we perform parameter error quality analysis and combine orbital segments from complementary orbits to obtain improved inversions, even when the original data have significant gaps. This allows us to obtain reliable solutions up to octupole moments and increase our ability to determine the secular variation of the Jovian magnetic field. This analysis also has implication for the analysis of the higher order terms of the Saturn magnetic field to be observed by Cassini. The initial Saturn orbit injection pass is at very low altitude with coverage over a limited longitude range, but later high altitude passes with high inclination can complement those observations to provide a reliable measurement up to the 5th order moment. We illustrate the identifications of these critical Cassini Passes.
Dougherty K. M. K. M.
Galland Kivelson Margaret
Giampieri Giacomo
Khurana Krishan K.
Russell Christopher T.
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