A new Enceladus base map and global control network in support of geological mapping

Abstract

: From its active south polar terrain, to its heavily tectonized equatorial regions, to its mid- latitude viscously relaxed craters, Enceladus presents a diverse set of geologic provinces that record a complex geologic history. Fully unraveling the evolution of Enceladus’ surface requires integrating disparate ob- servations and insights from across the satellite into a single self-consistent geologic history–a task that re- quires global geologic mapping. In support of a new global mapping effort, we have begun preliminary work on an updated global control network and base map for Enceladus. The new, technically robust, data- rich, well-documented network and base map will ena- ble high-fidelity mapping of Enceladus and enhance future investigations of the satellite. and low phase images is therefore challenging. Com- paring and mapping geographically co-located images therefore necessitates the development of a robust con- trol network. Basic Approach: Our preliminary global control network is being created from ~370 Cassini Imaging Science Subsystem (ISS) images with resolution better than 1 km/px. We initially focus on clear and green filter images (651 and 569 nm effective wavelength, respectively), supplemented by other filters in a limited number of regions with low image coverage. Addition- al filters will be included as resources permit. All im- ages were ingested into ISIS3 for processing and con- trol network development.