Aeolian Features of Scandia Cavi
NASA/JPL/University of Arizona
Aeolian Features of Scandia Cavi
ESP_017426_2570  Science Theme: 

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This HiRISE image shows modified barchan dunes with shapes that resemble “raptor claws.” The unusual morphology of these dunes suggests a limited supply of windblown sand.

Winds likely blew from the northeast resulting in elongate dunes with an asymmetric downwind point. The transverse crests of the smaller ripples/mega-ripple bed-forms surrounding the dune, echo the dominant downwind direction towards the southwest.

This locality is in the Northern Lowlands directly east of Dokka Crater in Scandia Cavi.

Written by: Shirley (Sunny) Rosendahl and Marjorie A. Chan   (30 September 2015)

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Acquisition date
15 April 2010

Local Mars time:
14:26

Latitude (centered)
76.931°

Longitude (East)
226.626°

Range to target site
317.3 km (198.3 miles)

Original image scale range
31.7 cm/pixel (with 1 x 1 binning) so objects ~95 cm across are resolved

Map projected scale
25 cm/pixel

Map projection
Polarstereographic

Emission angle:
0.2°

Phase angle:
55.3°

Solar incidence angle
55°, with the Sun about 35° above the horizon

Solar longitude
77.8°, Northern Spring

North azimuth:
103°

Sub-solar azimuth:
322.8°
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HiView

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IRB: infrared-red-blue
RGB: red-green-blue
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Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

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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:
NASA/JPL/University of Arizona



Postscript
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.