A Frosted Surface
NASA/JPL/University of Arizona
A Frosted Surface
ESP_058900_2595  Science Theme: Seasonal Processes
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This is the first of a new monitoring series to track seasonal processes. It is also a striking image with late winter angled illumination over dunes covered by carbon dioxide frost mixed with dust.

Dark spots may be where sand is exposed from very early defrosting activity. The incidence angle is 87 degrees, or just 3 degrees above the horizon.

Written by: Alfred McEwen (audio: Tre Gibbs)  (13 May 2019)
 
Acquisition date
18 February 2019

Local Mars time
13:02

Latitude (centered)
79.591°

Longitude (East)
158.383°

Spacecraft altitude
320.6 km (199.2 miles)

Original image scale range
64.2 cm/pixel (with 2 x 2 binning) so objects ~192 cm across are resolved

Map projected scale
50 cm/pixel

Map projection
Polarstereographic

Emission angle
1.3°

Phase angle
87.8°

Solar incidence angle
87°, with the Sun about 3° above the horizon

Solar longitude
343.3°, Northern Winter

For non-map projected images
North azimuth:  106°
Sub-solar azimuth:  301.3°
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   (440MB)

IRB color
map-projected   (256MB)

JP2 EXTRAS
Black and white
map-projected  (152MB)
non-map           (169MB)

IRB color
map projected  (61MB)
non-map           (158MB)

Merged IRB
map projected  (446MB)

Merged RGB
map-projected  (410MB)

RGB color
non map           (143MB)
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.