East Coprates Chasma Dune Fields and Wall Rock
NASA/JPL/UArizona
East Coprates Chasma Dune Fields and Wall Rock
ESP_025164_1655  Science Theme: Aeolian Processes
One of the suggested goals for this observation was to investigate the relation of dune material with wall rock as a suspected sand source.

Outcrops of dark material are located upslope of the dune field. Adjacent HiRISE images show evidence that the dunes may be locally derived, perhaps being composed of the same material that makes up the wallrock. This area is also being studied to see if any of the dunes are active, in which case changes in the position of dunes and ripples may be seen.

Coprates Chasma is part of the large Valles Marineris canyon, the largest one in the Solar System.

This caption is based on the original science rationale.

Written by: HiRISE Science Team (narration: Tre Gibbs)  (30 January 2013)

This is a stereo pair with ESP_025731_1655.
 
Acquisition date
09 December 2011

Local Mars time
14:45

Latitude (centered)
-14.192°

Longitude (East)
306.591°

Spacecraft altitude
260.0 km (161.6 miles)

Original image scale range
26.9 cm/pixel (with 1 x 1 binning) so objects ~81 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
11.1°

Phase angle
59.5°

Solar incidence angle
51°, with the Sun about 39° above the horizon

Solar longitude
40.8°, Northern Spring

For non-map projected images
North azimuth:  95°
Sub-solar azimuth:  40.3°
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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.