HiRISE | Field of Transverse Aeolian Ridges in Proctor Crater (ESP_024449

NASA/JPL-Caltech/UArizona

Field of Transverse Aeolian Ridges in Proctor Crater
ESP_024449_1320 Science Theme: Aeolian Processes

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Transverse Aeolian Ridges (or TARs) are small aeolian bedforms that are distinct from typical dunes or ripples. TARs are found all over Mars, and are typically located near layered terrains, or near fields of large dark dunes as they are here in Proctor Crater in the Southern hemisphere.

TARS form transverse (perpendicular) to the wind direction and are thought to be composed of coarse-grained material. They also appear to be indurated (hardened) and may be much less mobile than the larger dunes.

Written by: Dan Berman (25 October 2011)

This is a stereo pair with ESP_024515_1320.

Acquisition date
14 October 2011

Local Mars time
14:27

Latitude (centered)
-47.728°

Longitude (East)
31.009°

Spacecraft altitude
252.1 km (156.7 miles)

Original image scale range
54.5 cm/pixel (with 2 x 2 binning) so objects ~163 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
23.6°

Phase angle
78.8°

Solar incidence angle
63°, with the Sun about 27° above the horizon

Solar longitude
15.1°, Northern Spring

For non-map projected images
North azimuth: 95°
Sub-solar azimuth: 54.8°

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
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map-projected   (246MB)

IRB color
map-projected   (144MB)

JP2 EXTRAS
Black and white
map-projected (97MB)
non-map           (130MB)

IRB color
map projected (35MB)
non-map           (122MB)

Merged IRB
map projected (237MB)

Merged RGB
map-projected (219MB)

RGB color
non map           (114MB)

ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

ADDITIONAL INFORMATION
B&W label
Color label
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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.