Aboard the MGS is the Mars Orbiter Camera (MOC). The MOC is used to get high resolution images from the surface of Mars. This camera is able to obtain pictures of both wide angle and narrow angle. The two wide angle lenses are used to capture the Martian landscape from horizon to horizon while the narrow angle lens has a resolution of up to 1.4 meters/pixel. This translates to mean that an object as small as 1.4 meters wide could be seen by the MOC, though it would be a single square pixel.

The MGS under construction

With that kind of imaging power, the MGS was able to recapture the Cydonia plain at 2.5m/pixel (compared to the 47m/pixel resolution of the original Viking photograph). Once the new data was received by scientists in NASA, many of the very same image processing techniques were applied.

The result: a picture quite different than the "Face" that Viking had beamed back to earth two decades ago.