Dunes in Herschel Crater
NASA/JPL/University of Arizona

Dunes in Herschel Crater
PSP_002728_1645  Science Theme: Aeolian Processes
Español



WALLPAPER

800  1024  
1152  1280  
1440  1600  
1920  2048  
2560  

HIFLYER

PDF, 11 x 17 in  
This image shows dunes on the floor of Herschel Crater. The steep faces ("slipfaces") are oriented downwind, in the direction of motion of the dunes. One feature of particular interest is the dune-free area downwind of the crater at the image center. Some sand has been trapped in the crater, but the crater prevents the dunes from migrating directly downwind.

Sand dunes form naturally as a result of the transport of sand by the wind. The dunes in this image are somewhat crescent-shaped, but are being extended and distorted downwind and merging with nearby dunes; this complex behavior is common in dune fields on Earth.

In the southern part of the image the sand lies in sheets rather than well-defined dunes. At high resolution, the dune surfaces are covered in small ripples and scallops, also shaped by the wind.

Written by: Colin Dundas   (6 October 2010)



 Image Products: All image links are drag & drop for HiView, or click to download
JPEG
Grayscale: map projected  non-map
IRB color: map projected  non-map
Merged IRB: map projected
Merged RGB: map projected
RGB color: non-map projected

JP2 DOWNLOAD
Grayscale: map-projected (984.4 MB)
IRB color: map-projected (461.4 MB)

JP2 EXTRAS
Grayscale: map-projected  (449.7 MB),
non-map  (613.4 MB)
IRB color: map projected  (181.3 MB)
non-map  (488.5 MB)
Merged IRB: map projected  (225.1 MB)
Merged RGB: map-projected  (227.5 MB)
RGB color: non map-projected  (475.7 MB)

ADDITIONAL IMAGE INFORMATION
Grayscale label   Color label
Merged IRB label   Merged RGB label
EDR products

About color products (PDF)
HiView main page

 Observation Toolbox
Acquisition date:25 February 2007 Local Mars time: 3:45 PM
Latitude (centered):-15.107° Longitude (East):131.897°
Range to target site:258.6 km (161.6 miles)Original image scale range:25.9 cm/pixel (with 1 x 1 binning) so objects ~78 cm across are resolved
Map projected scale:25 cm/pixel and North is upMap projection:Equirectangular
Emission angle:0.2° Phase angle:56.5°
Solar incidence angle:56°, with the Sun about 34° above the horizon Solar longitude:189.9°, Northern Autumn
For non-map projected products:
North azimuth:97° Sub-solar azimuth:10.4°
For map-projected products
North azimuth:270°Sub solar azimuth:185.0°

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
Postscript
For information about NASA and agency programs on the Web, visit: http://www.nasa.gov. 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.