Mars' Many Dune Fields
ESP_022607_1725  Science Theme: Aeolian Processes
HiRISE observations can be used to aid in the classification and volume estimates of dunes for the USGS global dune database--another way how the HiRISE camera helps other science agencies.

Sand dunes are among the most widespread aeolian features present on Mars. Their spatial distribution and morphology, sensitive to subtle shifts in wind circulation patterns and wind strengths, can relate to patterns of erosion and deposition, and give clues to the sedimentary history of the surrounding terrain.

Dunes are particularly suited to comprehensive planetary studies because they are abundant over a wide range of elevations and terrain types. Thus a global scale study of Martian dunes serves a dual purpose in furthering understanding of both climatic and sedimentary processes, two fundamental topics currently driving Martian science.

This caption is based on the original science rationale.

Written by: HiRISE Science Team  (6 July 2011)
Acquisition date
24 May 2011

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
263.3 km (163.6 miles)

Original image scale range
26.6 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

Emission angle

Phase angle

Solar incidence angle
37°, with the Sun about 53° above the horizon

Solar longitude
298.1°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  338.5°
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

Black and white
map-projected   (471MB)

IRB color
map-projected   (245MB)

Black and white
map-projected  (172MB)
non-map           (168MB)

IRB color
map projected  (32MB)
non-map           (193MB)

Merged IRB
map projected  (126MB)

Merged RGB
map-projected  (128MB)

RGB color
non map           (185MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

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

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

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.