Figure 1. Contribution functions of the gravitational harmonics J2 (blue solid), J4 (red dashed), and J6 (yellow dotted) for a typical, three-layer Saturn model. The contribution “density” ( ( )µJ r dr) is plotted in the left panel and the cumulative contribution in the right panel. The horizontal line intersects the curves at a depth where the corresponding J reaches 90% of its final value.
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