Mars Global Surveyor
Mars Orbiter Camera

Mars Orbiter Camera (MOC) Low Resolution Image:
A Regional View on Orbit 63


Mars Global Surveyor Mars Orbiter Camera Release:                  MOC2-22
Mars Global Surveyor Mars Orbiter Camera Image IDs:         566493678.6301
                                                         P063-01 & P063-02

Click on image for full resolution version.

(A) GIF = 101 KBytes

You may need to adjust the images for the gamma of your monitor to insure proper viewing.

Note: This MOC image is made available in order to share with the public the excitement of new discoveries being made via the Mars Global Surveyor spacecraft. The image may be reproduced only if the image is credited to "Malin Space Science Systems/NASA". Release of this image does not constitute a release of scientific data. The image and its caption should not be referenced in the scientific literature. Full data releases to the scientific community are scheduled by the Mars Global Surveyor Project and NASA Planetary Data System. Typically, data will be released after a 6 month calibration and validation period.

Click Here for more information on MGS data release and archiving plans.

The MOC wide angle cameras, although of very low resolution, have the advantange of areal and color coverage. Unfortunately, they suffer from extremely distorted viewing geometry during the present aerobraking orbit, stemming from the need to rotate the spacecraft to acquire images while the spacecraft altitude and latitude varies. However, by combining knowledge of the spacecraft motion and pointing with understanding of the distortions within the camera lenses, it is possible to reconstruct the data as if viewed from a specific point in the orbit. Such a reconstruction is shown in the image above, a view of Mars as it would appear to a person with a wide angle lens at a altitude of about 2700 km (1690 mi) above 30° South latitude, 70° West longitude. It is reproduced here at close to its original, 7.4 km (4.6 mi) resolution. About 100° of latitude and longitude are visible, with the seasonal south polar carbon dioxide frost cap at the bottom and a portion of the Valles Marineris stretching across the upper quarter of the picture. Color fringing along the right side of the image, and the slightly non-circular outline of the edge of the planet, result from unmodelled spacecraft attitude relationships and lens distortion as these differ between the two cameras (red and blue; green is synthesized by combining red with blue). This image was taken three weeks after a large regional dust storm had developed, and the hazy appearance, especially towards the edges of the planet, results from atmospheric dust.

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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