Geometry of Saturn's magnetopause model

Abstract

We report on an idealized three‐dimensional model of Saturn's magnetopause. Using the subsolar point distance R 0 = 24 R S , we provide an analytical parameterization of the magnetopause model described by Maurice and Engle [1995]. This representation of Saturn's magnetopause is consistent with Voyager 1 magnetopause crossing observations. The magnetopause shape is then scaled to 17 R S ≤ R 0 ≤ 45 R S and applied to Pioneer 11 and Voyager 2 observations. Results highlight variations of R 0 during magnetopause crossings (over a few hours) and/or between inbound and outbound crossings (over a few days). Finally, we extend the parameterization of Saturn's magnetopause to nonzero dipole tilt angles. The model is intended for use in support of the Cassini mission.