Stock Photo - 01/05/2001 ___ The 2001 Mars Odyssey Orbiter comes to rest on a workstand in the Spacecraft Assembly & Encapsulation Facility –2. Workers check the spacecraft’s position. The Mars Odyssey Orbiter carries three science instruments: the Thermal Emission Imaging System 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 GRS is a rebuild of the instrument lost with the Mars Observer mission. The MARIE will characterize aspects of the near_space radiation environment as related 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