Jupiter gravity field estimated from the first two Juno orbits
Geophysical Research Letters2017Vol. 44(10), pp. 4694–4700
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W. M. Folkner, L. Iess, J. D. Anderson, S. W. Asmar, Dustin Buccino, Daniele Durante, Michael R. Feldman, Luis Gomez Casajus, M. Gregnanin, A. Milani, Marzia Parisi, Ryan S. Park, Daniele Serra, Giacomo Tommei, Paolo Tortora, Marco Zannoni, S. J. Bolton, J. E. P. Connerney, S. Levin
Abstract
Abstract The combination of the Doppler data from the first two Juno science orbits provides an improved estimate of the gravity field of Jupiter, crucial for interior modeling of giant planets. The low‐degree spherical harmonic coefficients, especially J 4 and J 6 , are determined with accuracies better than previously published by a factor of 5 or more. In addition, the independent estimates of the Jovian gravity field, obtained by the orbits separately, agree within uncertainties, pointing to a good stability of the solution. The degree 2 sectoral and tesseral coefficients, C 2,1 , S 2,1 , C 2,2 , and S 2,2 , were determined to be statistically zero as expected for a fluid planet in equilibrium.
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