Bright Wind Streak
Bright Wind Streak
PSP_005109_1770  Science Theme: Sedimentary/Layering Processes


This HiRISE observation shows an albedo change associated with an impact crater at the northeast edge of the image. (Albedo measures how much light is reflected by a surface. An albedo of 0 means that no light is reflected). A streak of light material extends away from the crater. This is a wind streak, so called since it results from the interaction of wind and topography.

Wind streaks are common in the area of this image as well as other areas on Mars. They form when dust is preferentially eroded or deposited downwind of a crater or other feature due to its effect on the wind. As such, they are useful indications of wind directions on the Martian surface, an important constraint on modeling the weather of the planet.

Some striations in the image are artifacts due to slight differences between the camera detectors.

Written by: Colin Dundas  (19 September 2007)
Acquisition date
29 August 2007

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
262.9 km (163.4 miles)

Original image scale range
26.3 cm/pixel (with 1 x 1 binning) so objects ~79 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection

Emission angle

Phase angle

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

Solar longitude
304.4°, Northern Winter

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  335.6°
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Black & white is 5 km across; enhanced color about 1 km
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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.