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In the Spacecraft Assembly & Encapsulation Facility -2, workers help guide the <a href="http://mars.jpl.nasa.gov/2001/">2001 Mars Odyssey Orbiter </a> to a workstand (left). The spacecraft 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 th…
