Planetary Satellite Geodesy: Voyager to Galileo

The Voyager mission provided the opportunity to explore not only the giant planets of the outer solar system, Jupiter, Saturn, Uranus and Neptune, but also their complex system of planetary satellites. A primary concern for the scientific exploration of these bodies was the development of map bases. Not only was this necessary for the correlation of other data and analyses of geological features, it also provide the key geophysical quantities of radius, shape and spin state required to constrain interior and dynamical models. The Galileo mission to the Jupiter system provided the first high resolution mapping of the Galilean moons, building on the information provided by Voyage. Mert Davies played a central role in developing the camera systems and analysis tools vital to all these projects and tasks, contributing in a multitude of ways to discoveries ranging from the discovery of volcanism on Io and Europa's putative ocean to the chaotic spin state of Hyperion.