Mars Global Surveyor
Mars Orbiter Camera

December 9, 1998

MOC--The First Year--Top 10

During its first year at Mars, the Mars Global Surveyor (MGS) Mars Orbiter Camera (MOC) observed the red planet over the course of nearly 410 orbits between mid-September 1997 and mid-September 1998. The MOC was turned off during the Aerobrake Phase 2 orbits that began in mid-September 1998, and is expected to remain off until March 1999. The following 10 pictures represent the best images and important results obtained during the first year of MOC operations. Seven major themes are explored by these pictures: (1) liquid water in the martian past, (2) the discovery of extensive layered rock, (3) the observation of boulder-strewn surfaces in the highest resolution images, (4) volcanism and newly-observed volcanic features, (5) the martian fretted terrain, (6) the polar layered deposits, and (7) the work of wind on the martian surface. Enjoy!

Sustained Flow

Seepage and Ponding

Valley Networks

Layered Crust


Fluid Volcanism

Olympus Mons

Fretted Terrain

Polar Deposits

Wind Activity

MOC Observed Mars In Three Phases In 1997 and 1998:
     Aerobrake Phase 1:  15 SEP 97 to 18 FEB 98

     Science Phase 1:    28 MAR 98 to 28 APR 98

     Science Phase 2:    01 JUN 98 to 13 SEP 98

Malin Space Science Systems and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission. MSSS operates the camera from its facilities in San Diego, CA. The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO.

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