HiRISE | Samara Valles (ESP_016895

NASA/JPL-Caltech/UArizona

Samara Valles
ESP_016895_1525 Science Theme: Sedimentary/Layering Processes

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Samara Valles is one of the longest ancient valley systems on Mars. This system traverses over 1000 kilometers towards the northwest across the heavily cratered Southern highlands eroding into the gentle slopes of Terra Meridiani. The valley terminates in the Northern lowlands within the Chryse Basin where both Viking Lander 1 and Pathfinder are located.

The full image is centered at 27 degrees South and 344 degrees West and transects a portion of the upper reach of Samara Valles. The valley is several hundred meters wide at this location and the surface is mantled with dust as evidenced by the system of dunes that line the valley floor. The surface is heavily cratered by ancient impacts whose ejecta blankets have long ago been eroded and subsequently buried by dust which mantles the entire region.

Written by: Ginny Gulick (31 March 2010)

Acquisition date
04 March 2010

Local Mars time
15:06

Latitude (centered)
-27.043°

Longitude (East)
344.388°

Spacecraft altitude
257.9 km (160.3 miles)

Original image scale range
26.1 cm/pixel (with 1 x 1 binning) so objects ~78 cm across are resolved

Map projected scale
25 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
9.3°

Phase angle
72.8°

Solar incidence angle
67°, with the Sun about 23° above the horizon

Solar longitude
59.7°, Northern Spring

For non-map projected images
North azimuth: 96°
Sub-solar azimuth: 48.1°

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   (760MB)

IRB color
map-projected   (341MB)

JP2 EXTRAS
Black and white
map-projected (372MB)
non-map           (412MB)

IRB color
map projected (101MB)
non-map           (282MB)

Merged IRB
map projected (163MB)

Merged RGB
map-projected (158MB)

RGB color
non map           (293MB)

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.