Mars Global Surveyor
Mars Orbiter Camera
1.5 Meter Per Pixel View of Boulders in Ganges Chasma
MGS MOC Release No. MOC2-87, 11 March 1999
The Mars Orbiter Camera (MOC) on board the Mars Global Surveyor (MGS)
spacecraft was designed to be able to take pictures that "bridge the
gap" between what could be seen by the Mariner 9 and Viking Orbiters
from space and what could be seen by landers from the
ground. In other words, MOC was designed to be able to see boulders of
sizes similar to and larger than
those named "Yogi" at the Mars Pathfinder site and
"Big Joe" at the Viking 1 landing site. To see such boulders, a resolution
of at least 1.5 meters (5 feet) per pixel was required.
With the start of the MGS Mapping Phase of the mission
during the second week of March 1999, the MOC team is pleased to
report that "the gap is bridged". This image shows a field of boulders
on the surface of a landslide deposit in Ganges Chasma.
Ganges Chasma is one of the valleys in the Valles Marineris canyon system.
The image resolution is 1.5 meters per pixel.
The boulders shown here range in size from about 2 meters (7 feet) to
about 20 meters (66 feet) in size. The image covers an area 1 kilometer
(0.62 miles) across, and illumination is from the upper left.
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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