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North Polar Cap Margin (natural color (top) and enhanced color (bottom))
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Caption:
Water ice mixed with dust form the residual north polar ice cap (brown color). Seasonal frost of relatively pure ice (white color) partly blankets the polar deposits. A large trough, which is occupied by linear sand dunes (dark band), exposes polar layered deposits. The layered deposits hold a partial record of the history of atmospheric activity and climate of Mars. Center of picture is at latitude 82 degrees N., longitude 84 degrees W. Viking Orbiter Picture Numbers 82B11-12 (violet), 82B15-16 (green), and 82B17-18 (red) at 53 m/pixel resolution. Picture width is 106 km. North is 6 degrees counter-clockwise from top.
Cataloging Keywords:
| Name | Value | Additional Values |
|---|---|---|
| Target | Mars | |
| System | ||
| Target Type | Planet | |
| Mission | Viking | |
| Instrument Host | Viking 2 Orbiter | |
| Host Type | Orbiter | |
| Instrument | Visual Imaging Subsystem - Camera A | |
| Detector | ||
| Extra Keywords | Atmosphere, Color, Dune, Dust, Water | |
| Acquisition Date | ||
| Release Date | 1998-06-04 | |
| Date in Caption | ||
| Image Credit | NASA/JPL/USGS | |
| Source | photojournal.jpl.nasa.gov/catalog/PIA00152 | |
| Identifier | PIA00152 | |
