Wind at Work
NASA/JPL/University of Arizona
Wind at Work
ESP_044000_1750  Science Theme: Aeolian Processes
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Wind is one of the most active forces shaping Mars’ surface in today’s climate. The wind has carved the features we call “yardangs,” one of many in this scene, and deposited sand on the floor of shallow channels between them.

On the sand, the wind forms ripples and small dunes. In Mars’ thin atmosphere, light is not scattered much, so the shadows cast by the yardangs are sharp and dark. (Note: The cutout is not map-projected, so approximate north is down).

Written by: Candy Hansen (audio: Tre Gibbs)  (10 February 2016)

This is a stereo pair with ESP_052650_1750.
 
Acquisition date
15 December 2015

Local Mars time:
15:05

Latitude (centered)
-4.748°

Longitude (East)
154.632°

Spacecraft altitude
268.2 km (167.6 miles)

Original image scale range
26.8 cm/pixel (with 1 x 1 binning) so objects ~80 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
0.5°

Phase angle:
54.4°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
82.0°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  41.7°
JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (810MB)

IRB color
map-projected   (473MB)

JP2 EXTRAS
Black and white
map-projected  (415MB)
non-map           (400MB)

IRB color
map projected  (125MB)
non-map           (364MB)

Merged IRB
map projected  (191MB)

Merged RGB
map-projected  (186MB)

RGB color
non map           (361MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

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.