Mars Global Surveyor Mars Orbiter Camera Release: MOC2-45A, -45B, -45C, -45D Mars Global Surveyor Mars Orbiter Camera Image ID: 577826559.25801 P258-01 (WA image) 577826601.25803 P258-03 (NA image)See also:
MOC images are usually planned to be as long as possible, in order to accommodate downrange uncertainties in the orbit. Prior observations were based on orbit predictions that were only a day old, and the correction for timing uncertainty was about one-quarter of the frame length. Recent, larger variations in the uncertainty of downtrack position were seen in the Viking Lander 1 and Pathfinder observations. The Cydonia image timing (start position) was compensated based on these most recent variations. The offset position of the acquired image (see below) resulted from a less-than-anticipated prediction uncertainty. This example illustrates one of the difficulties associated with targeting the MOC.
MOC 25803 was acquired at 12:23 PM PDT on 23 April 1998. The image captures an area called by some "The City Square." Image (B) is MOC 25801, a red wide-angle image, with the location of the narrow angle image marked by a white box. Image (C) is a processed version of MOC 25803; the raw and JPL-processed versions may be viewed and downloaded from JPL. Image (D) is an section of MOC 25803, showing the "City Square."
WARNING: THE FOLLOWING IMAGE IS VERY BIG
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JPG = 1.53 MB
GIF = 8.1 MB
Processing performed: pixel-to-pixel instrument variation and gross detector shading, pixel-to-pixel averaging to reduce noise, spatial-frequency filtering to enhance fine detail, and contrast enhancement.
Note that the raw, unprocessed data are available at:
This section of MOC 25803 shows an area believed by some to be the centerpiece of a geometric network of artificial structures within the Cydonia region, one of which is the "Face on Mars".
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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