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

For non-map projected images
North azimuth:  103°
Sub-solar azimuth:  322.8°
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IRB color
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Merged RGB
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RGB color
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IRB color
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JP2 EXTRAS
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map-projected  (547MB)
non-map           (405MB)

IRB color
map projected  (171MB)
non-map           (320MB)

Merged IRB
map projected  (247MB)

Merged RGB
map-projected  (235MB)

RGB color
non map           (295MB)
ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
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
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. The HiRISE camera was built by Ball Aerospace and Technology Corporation and is operated by the University of Arizona.