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30 December 2004 Mapping the elemental composition of Ceres and Vesta: Dawn’s gamma ray and neutron detector
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Dawn is a NASA discovery mission that will explore the main belt asteroids (1) Ceres and (4) Vesta. Ceres and Vesta are among the oldest bodies in the solar system and represent very different evolutionary paths. By studying these ancient, complementary asteroids, we will answer fundamental questions about the early solar system and planetary formation processes. The Dawn payload consists of a Framing Camera (FC), a visual and infrared mapping spectrometer (VIR), and a Gamma Ray and Neutron Detector (GRaND). The instruments provide data needed to investigate the structure, geology, mineralogy, and geochemistry of the asteroids. GRaND provides the data for the geochemistry investigation, including maps of most major elements and selected radioactive and trace elements. An updated description of the GRaND instrument is given along with the expected performance of GRaND at Vesta and Ceres. Approaches to combine data from FC, VIR and GRaND are discussed.
© (2004) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Thomas H. Prettyman, William C. Feldman, Bruce L. Barraclough, Maria Teresa Capria, Angioletta Coradini, D. C. Enemark, Kenneth R. Fuller, David J. Lawrence, D. E. Patrick, Carol A. Raymond, S. A. Storms, and R. L. Williford "Mapping the elemental composition of Ceres and Vesta: Dawn’s gamma ray and neutron detector", Proc. SPIE 5660, Instruments, Science, and Methods for Geospace and Planetary Remote Sensing, (30 December 2004);

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