HiRISE | Translucent Ice in North Polar Region (PSP_009696

NASA/JPL/University of Arizona

Translucent Ice in North Polar Region
PSP_009696_2575 Science Theme: Seasonal Processes

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This polar terrain is located near the north pole. The bright patch of material is ice, which might have been deposited in the previous winter.

After ice in the form of surface frost is deposited from the atmosphere, it experiences changes throughout the Martian year. Some of the ice has a polygonal texture which probably formed when temperature variations created stress and cracks in the ice.

The dark features scattered throughout the scene are dunes. The streaks emanating from the dunes trending in the southwest direction indicate the dominant direction of the wind in recent times.

Written by: Kelly Kolb (8 October 2008)

This is a stereo pair with PSP_009736_2575.

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Acquisition date:	21 August 2008	Local Mars time:	2:27 PM
Latitude (centered):	77.5 degrees	Longitude (East):	300.1 degrees
Range to target site:	320.8 km (200.5 miles)	Original image scale range:	64.2 cm/pixel (with 2 x 2 binning) so objects ~193 cm across are resolved
Map projected scale:	50 cm/pixel	Map projection:	POLAR STEREOGRAPHIC
Emission angle:	8.8 degrees	Phase angle:	65.3 degrees
Solar incidence angle:	58 degrees, with the Sun about 32 degrees above the horizon	Solar longitude:	115.6 degrees, Northern Summer
For non-map projected products:
North azimuth:	107 degrees	Sub-solar azimuth:	326.5 degrees
For map-projected products
North azimuth:	329.8 degrees	Sub solar azimuth:	190.8 degrees

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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: 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.