The Dune Sea of Ganges Chasma
NASA/JPL/University of Arizona
The Dune Sea of Ganges Chasma
ESP_044258_1715  Science Theme: Aeolian Processes


1080p (MP4)  
720p (MP4)  
Listen to the text  


800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  2880  


PDF, 11 x 17 in  


This image is at the eastern edge of a very large deposit of wind-blown dust that occupies Ganges Chasma.

This thick deposit surrounds hills and mesas that rise up through it. We can tell from the patterns that the wind here is primarily blowing from east to west. There is a large cone-shaped hill whose eastern toe is surrounded by a dune crest, but its western toe--and a lane that stretches off the image frame--is clear of this dust deposit.

High-standing features like this might cause the wind to flow around it in such a way as to leave a cleared area that is similar to a wake behind a boat.

Written by: Ross Beyer (audio: Tre Gibbs)   (9 March 2016)

Click to share this post on Twitter Click to share this post on Facebook Click to share this post on Google+ Click to share this post on Tumblr

 Image Products: All image links are drag & drop for HiView, or click to download
B&W: map projected  non-map

IRB color: map projected  non-map

Merged IRB: map projected

Merged RGB: map projected

RGB color: non-map projected

B&W: map-projected (191MB)

IRB color: map-projected (116MB)
B&W: map-projected  (99MB),
non-map  (101MB)

IRB color: map projected  (42MB)
non-map  (115MB)

Merged IRB: map projected  (200MB)

Merged RGB: map-projected  (176MB)

RGB color: non map-projected  (99MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:05 January 2016 Local Mars time:15:07
Latitude (centered):-8.424° Longitude (East):312.040°
Range to target site:266.1 km (166.3 miles)Original image scale range:53.3 cm/pixel (with 2 x 2 binning) so objects ~160 cm across are resolved
Map projected scale:50 cm/pixel and North is upMap projection:Equirectangular
Emission angle:0.1° Phase angle:56.8°
Solar incidence angle:57°, with the Sun about 33° above the horizon Solar longitude:90.9°, Northern Summer

Context map

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: Image: NASA/JPL/University of Arizona
For information about NASA and agency programs on the Web, visit: 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.