Crater Dunes Revisited
NASA/JPL/University of Arizona
Crater Dunes Revisited
PSP_010854_1325  Science Theme: Seasonal Processes
Italian 

WALLPAPER

800  1024
1152  1280
1440  1600
1920  2048
2560
In the winter, these dunes in an unnamed crater east of Proctor Crater are covered with seasonal carbon dioxide frost (dry ice). In the spring, the frost gradually evaporates but lingers in protected regions. In this color image bright ice deposits in sheltered areas highlight the ripples on the dunes.

These dunes were imaged during the first year of MRO's mission. Images taken now in the second Martian spring can be compared to the previous year to study interannual variability.

Written by: Candy Hansen  (18 February 2009)
twitter  •  facebook  •  google+  •  tumblr
 
Acquisition date
19 November 2008

Local Mars time:
15:59

Latitude (centered)
-47.184°

Longitude (East)
34.001°

Range to target site
254.5 km (159.0 miles)

Original image scale range
50.9 cm/pixel (with 2 x 2 binning) so objects ~153 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle:
8.2°

Phase angle:
70.3°

Solar incidence angle
77°, with the Sun about 13° above the horizon

Solar longitude
160.1°, Northern Summer

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  35.5°
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   (436MB)

IRB color
map-projected   (197MB)

JP2 EXTRAS
Black and white
map-projected  (230MB)
non-map           (274MB)

IRB color
map projected  (89MB)
non-map           (201MB)

Merged IRB
map projected  (362MB)

Merged RGB
map-projected  (359MB)

RGB color
non map           (177MB)
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/University of Arizona

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.