HR: 10:40h
AN: P11C-02 INVITED     [PDF]
TI: Studying the Surfaces of the Icy Galilean Satellites With JIMO
AU: * Prockter, L
EM: Louise.Prockter@jhuapl.edu
AF: Johns Hopkins University Applied Physics Laboratory, MP3-E128, 11100 Johns Hopkins Road, Laurel, MD 20723 United States
AU: Schenk, P
EM: schenk@lpi.usra.edu
AF: Lunar and Planetary Institute, 3600 Bay Area Boulevard, Houston, TX 77058 United States
AU: Pappalardo, R
EM: pappalardo@lasp.colorado.edu
AF: LASP/APS, Univ. Colorado, Colorado Ave., Boulder, CO 80309 United States
AB: The Geology subgroup of the Jupiter Icy Moons Orbiter (JIMO) Science Definition Team (SDT) has been working with colleagues within the planetary science community to determine the key outstanding science goals that could be met by the JIMO mission. Geological studies of the Galilean satellites will benefit from the spacecraft's long orbital periods around each satellite, lasting from one to several months. This mission plan allows us to select the optimal viewing conditions to complete global compositional and morphologic mapping at high resolution, and to target geologic features of key scientific interest at very high resolution. Community input to this planning process suggests two major science objectives, along with corresponding measurements proposed to meet them. Objective 1: Determine the origins of surface features and their implications for geological history and evolution. This encompasses investigations of magmatism (intrusion, extrusion, and diapirism), tectonism (isostatic compensation, and styles of faulting, flexure and folding), impact cratering (morphology and distribution), and gradation (erosion and deposition) processes (impact gardening, sputtering, mass wasting and frosts). Suggested measurements to meet this goal include (1) two dimensional global topographic mapping sufficient to discriminate features at a spatial scale of 10 m, and with better than or equal to 1 m relative vertical accuracy, (2) nested images of selected target areas at a range of resolutions down to the submeter pixel scale, (3) global (albedo) mapping at better than or equal to 10 m/pixel, and (4) multispectral global mapping in at least 3 colors at better than or equal to 100 m/pixel, with some subsets at better than 30 m/pixel. Objective 2. Identify and characterize potential landing sites for future missions. A primary component to the success of future landed missions is full characterization of potential sites in terms of their relative age, geological interest, and engineering safety. Measurement requirements suggested to meet this goal (in addition to the requirements of Objective 1) include the acquisition of super-high resolution images of selected target areas (with intermediate context imaging) down to 25 cm/pixel scale. The Geology subgroup passed these recommendations to the full JIMO Science Definition Team, to be incorporated into the final science recommendations for the JIMO mission.
DE: 6055 Surfaces and interiors
DE: 6061 Remote sensing
DE: 6207 Comparative planetology
DE: 6218 Jovian satellites
DE: 6297 Instruments and techniques
SC: Planetary Sciences [P]
MN: 2003 Fall Meeting