File:PIA13164 North Polar Cap Cross Section.jpg

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Summary

Description
English: This image shows a cross-section of a portion of the north polar ice cap of Mars, derived from data acquired by the Mars Reconnaissance Orbiter's Shallow Radar (SHARAD), one of six instruments on the spacecraft.

The data depict the region's internal ice structure, with annotations describing different layers. The ice depicted in this graphic is approximately 2 kilometers (1.2 miles) thick and 250 kilometers (155 miles) across. White lines show reflection of the radar signal back to the spacecraft. Each line represents a place where a layer sits on top of another. Scientists study how thick the pancake-like layers are, where they bulge and how they tilt up or down to understand what the surface of the ice sheet was like in the past as each new layer was deposited.
Date (published)
Source Catalog page · Full-res (JPEG · TIFF)
Author NASA/JPL-Caltech/ASI/UT
Other versions
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    Annotated Version
This image or video was catalogued by Jet Propulsion Laboratory of the United States National Aeronautics and Space Administration (NASA) under Photo ID: PIA13164.

This tag does not indicate the copyright status of the attached work. A normal copyright tag is still required. See Commons:Licensing.
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This media is a product of the
Mars Reconnaissance Orbiter mission
Credit and attribution belongs to the Shallow Subsurface Radar (SHARAD) team, NASA/JPL-Caltech/ASI/UT

Licensing

Public domain This file is in the public domain in the United States because it was solely created by NASA. NASA copyright policy states that "NASA material is not protected by copyright unless noted". (See Template:PD-USGov, NASA copyright policy page or JPL Image Use Policy.)
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Original upload log

The original description page was here. All following user names refer to en.wikipedia.
Date/Time Dimensions User Comment
2010-09-20 13:18 1936×939× (575535 bytes) Schaffman {{Information |Description = Radargram of Polar Cap |Source = JPL Photojournal |Date = ~~~~~ |Author = Italian space Agency |Permission = JLP Public Use Policy |other_versions = }}

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Date/TimeThumbnailDimensionsUserComment
current09:23, 4 March 2017Thumbnail for version as of 09:23, 4 March 20171,936 × 939 (562 KB)PhilipTerryGrahamTransferred from en.wikipedia
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