HiRISE | Northern Hemisphere Ice Cap (PSP_007392

NASA/JPL-Caltech/UArizona

Northern Hemisphere Ice Cap
PSP_007392_2650 Science Theme: Seasonal Processes

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This image shows layering within the northern hemisphere ice cap, which probably reflects seasonal variability in accumulation of the ice versus sublimation (going from solid to a gas).

The presence of sand dunes indicates transport of sedimentary materials by wind. Erosion of layering is apparent as a series of undulating ridges at the transition between the layered terrain and the dune field.

Near the top of the image several vents occur where materials from the shallow subsurface are erupted onto the surface.

Written by: John Grotzinger (26 March 2008)

Acquisition date
23 February 2008

Local Mars time
12:40

Latitude (centered)
84.984°

Longitude (East)
194.509°

Spacecraft altitude
319.0 km (198.3 miles)

Original image scale range
31.9 cm/pixel (with 1 x 1 binning) so objects ~96 cm across are resolved

Map projected scale
25 cm/pixel

Map projection
Polarstereographic

Emission angle
0.1°

Phase angle
70.6°

Solar incidence angle
71°, with the Sun about 19° above the horizon

Solar longitude
35.9°, Northern Spring

For non-map projected images
North azimuth: 123°
Sub-solar azimuth: 311.9°

JPEG
Black and white
map projected  non-map

IRB color
map projected  non-map

Merged IRB
map projected

Merged RGB
map projected

RGB color
non-map projected

JP2
Black and white
map-projected   (795MB)

IRB color
map-projected   (356MB)

JP2 EXTRAS
Black and white
map-projected (286MB)
non-map           (230MB)

IRB color
map projected (79MB)
non-map           (262MB)

Merged IRB
map projected (182MB)

Merged RGB
map-projected (169MB)

RGB color
non map           (230MB)

ADDITIONAL INFORMATION
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products
HiView

NB
IRB: infrared-red-blue
RGB: red-green-blue
About color products (PDF)

Black & white is 5 km across; enhanced color about 1 km
For scale, use JPEG/JP2 black & white map-projected images

USAGE POLICY
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-Caltech/UArizona

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.