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Michael Malin (Malin Space Science Systems)
Mars Orbiter Camera (MOC) images reveal a wealth of information on previously known landforms and processes, and provide insight into new interpretations of these aspects of Mars. Among the more obvious observations are the occurrence of thousands of meters of layered materials in the walls of the Valles Marineris, evidence of sustained flow within some reaches of Martian valley systems, and dunes of a variety of morphologies and albedos suggestive of different compositions and particle sizes or shapes. Atmospheric observations include photodocumentation of the life-cycle of the 1997 regional dust storm, observation of numerous local dust storms, spatial and temporal coverage of cloud dynamics during northern hemisphere winter and spring (Ls = 300 to 30), and monitoring of the north and south polar seasonal frost cap retreats.