1. Godwin and Cole

2. Mission Objectives  To determine the composition and geology of the planet’s surface  To detect evidence for water and ice  Study radiation environment

3. Mission Timeline  Launched April 7 th, 2001, arriving October 24 th  Mapping started in February 2002 and ongoing  Served as communication relay for Spirit and Opportunity

4. Instruments  Thermal Emission Imaging System Infrared imaging  The Gamma Ray Spectrometer Detect high energy neutrons  The Mars Radiation Environment Experiment Radiation Spectrometer Not working due to solar bombardment

6. Mission Results

7. Discoveries  Thermal dark spots at polar ice cap CO2 gas jets  Salt deposits on surface Provide further evidence for water  Overall global imaging Showed water-carved channels Mapped mineral concentrations  Discovered dacite Provided evidence for lava