Cratered Dune Forms
NASA/JPL/University of Arizona

Cratered Dune Forms
ESP_025389_1690  Science Theme: Sedimentary/Layering Processes
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One of the scientific goals for taking this observation is to create a stereo pair with another HiRISE image. From stereo pairs, which are pictures of the same area but at different angles, HiRISE creates 3D or anaglyph pictures.

Known since at least 2003, this is a wonderful case of aeolian sandstone that (a) preserves its original sand dune bedform shapes and (b) lies unconformably over a previously-eroded surface of layered sedimentary rock.

This caption is based on the original science rationale.

Written by: HiRISE Science Team   (28 March 2012)

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Acquisition date:26 December 2011 Local Mars time: 2:55 PM
Latitude (centered):-11.144° Longitude (East):284.903°
Range to target site:263.2 km (164.5 miles)Original image scale range:52.7 cm/pixel (with 2 x 2 binning) so objects ~158 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:6.3° Phase angle:48.0°
Solar incidence angle:53°, with the Sun about 37° above the horizon Solar longitude:48.6°, Northern Spring
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North azimuth:97° Sub-solar azimuth:41.5°
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North azimuth:270°Sub solar azimuth:214.0°

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All of the images produced by HiRISE and accessible on this site are within the public domain: there are no restrictions on their usage by anyone in the public, including news or science organizations. We do ask for a credit line where possible: Image: NASA/JPL/University of Arizona
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For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. NASA's Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, Calif., manages the Mars Reconnaissance Orbiter for NASA's Science Mission Directorate, Washington. Lockheed Martin Space Systems is the prime contractor for the project and built the spacecraft. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona. The image data were processed using the U.S. Geological Survey’s ISIS3 software.