Dunes Streaming through Hills
NASA/JPL-Caltech/UArizona
Dunes Streaming through Hills
ESP_034948_1720  Science Theme: Aeolian Processes
This dramatic image shows dark rippled bodies of sand, sometimes in the form of dunes, streaming through Ganges Chasma. The floor of the canyon is covered by hills and mesas, perhaps remnants of chaotic terrain that formed from sudden collapse as water was withdrawn to form outflow channels.

The sand moving through (generally from east to west, or upstream) interacts with the topography to make streamlined shapes. A closeup image in enhanced-color shows one hill with a dune piling up to the east.

Written by: Alfred McEwen (narration: Tre Gibbs)  (26 February 2014)

This is a stereo pair with ESP_033748_1720.
 
Acquisition date
09 January 2014

Local Mars time
15:14

Latitude (centered)
-7.951°

Longitude (East)
312.889°

Spacecraft altitude
267.0 km (165.9 miles)

Original image scale range
53.6 cm/pixel (with 2 x 2 binning) so objects ~161 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
4.1°

Phase angle
54.4°

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

Solar longitude
74.0°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  42.0°
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   (390MB)

IRB color
map-projected   (242MB)

JP2 EXTRAS
Black and white
map-projected  (214MB)
non-map           (205MB)

IRB color
map projected  (99MB)
non-map           (235MB)

Merged IRB
map projected  (412MB)

Merged RGB
map-projected  (370MB)

RGB color
non map           (208MB)
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-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.