Scars of Erosion
NASA/JPL-Caltech/UArizona
Scars of Erosion
ESP_020876_1330  Science Theme: Aeolian Processes
This large crescent dune in Kaiser Crater shows the scars of many types of seasonal erosional activities. Along its downwind slope are large gullies which are active during winter, when frost drives dune material downslope, carving out channels and creating fan-shaped aprons.

On the upwind slope (bottom), dust devil tracks are visible: dark lines and curlicues created during the spring season by small wind vortices vacuuming up a thin layer of dust and exposing the dark dune sand.

Note: Both the cutout and the above image are rotated so that North is to the right.

Written by: Serina Diniega  (16 February 2017)

This is a stereo pair with ESP_021720_1330.
 
Acquisition date
09 January 2011

Local Mars time
15:43

Latitude (centered)
-46.739°

Longitude (East)
20.131°

Spacecraft altitude
252.8 km (157.1 miles)

Original image scale range
25.3 cm/pixel (with 1 x 1 binning) so objects ~76 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
3.8°

Phase angle
60.6°

Solar incidence angle
57°, with the Sun about 33° above the horizon

Solar longitude
213.9°, Northern Autumn

For non-map projected images
North azimuth:  96°
Sub-solar azimuth:  21.0°
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   (647MB)

IRB color
map-projected   (292MB)

JP2 EXTRAS
Black and white
map-projected  (272MB)
non-map           (404MB)

IRB color
map projected  (91MB)
non-map           (305MB)

Merged IRB
map projected  (150MB)

Merged RGB
map-projected  (142MB)

RGB color
non map           (303MB)
ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

BONUS
4K (TIFF)
8K (TIFF)

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-Caltech/UArizona

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.