A Cloudy Day
NASA/JPL/University of Arizona
A Cloudy Day
ESP_025914_2540  Science Theme: Seasonal Processes
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Mars occasionally has cloudy weather. We intended to take a picture of the bright ice-covered dunes that are faintly visible through these thin clouds, but weather forecasting on Mars is just as challenging as on Earth.

Where the clouds are thin, the remaining bright winter ice is visible, protected in shallow grooves on the ground, in addition to covering the dunes.

Written by: Candy Hansen  (21 March 2012)
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Acquisition date
05 February 2012

Local Mars time:
14:20

Latitude (centered)
73.876°

Longitude (East)
334.715°

Range to target site
318.4 km (199.0 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:
4.6°

Phase angle:
58.0°

Solar incidence angle
54°, with the Sun about 36° above the horizon

Solar longitude
66.6°, Northern Spring

For non-map projected images
North azimuth:  102°
Sub-solar azimuth:  321.5°
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   (948MB)

IRB color
map-projected   (572MB)

JP2 EXTRAS
Black and white
map-projected  (549MB)
non-map           (393MB)

IRB color
map projected  (272MB)
non-map           (388MB)

Merged IRB
map projected  (241MB)

Merged RGB
map-projected  (216MB)

RGB color
non map           (334MB)
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/University of Arizona

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.