Stock Photo - 02/09/2001 ___ Workers in the in the Spacecraft Assembly and Encapsulation Facility 2 SAEF_2 attach logos to the Mars Odyssey solar panels, which are undergoing illumination testing. The orbiter will carry three science instruments: THEMIS, the Gamma Ray Spectrometer GRS, and the Mars Radiation Environment Experiment MARIE. THEMIS will map the mineralogy and morphology of the Martian surface using a high_resolution camera and a thermal infrared imaging spectrometer. The GRS will achieve global mapping of the elemental composition of the surface and determine the abundance of hydrogen in the shallow subsurface. The MARIE will characterize aspects of the near_space radiation environment with regards to the radiation_related risk to human explorers. The Mars Odyssey Orbiter is scheduled for launch on April 7, 2001, aboard a Delta 7925 rocket from Launch Pad 17_A, Cape Canaveral Air Force Station