Channel within a Valley in Northern Arabia Terra
Channel within a Valley in Northern Arabia Terra
ESP_079084_2170  Science Theme: Fluvial Processes
This channel is located within a large valley in the Northern Arabia Terra region of Mars. The channel is several thousand kilometers long and continues westward where it terminates in a depression on the surface.

The valley containing this channel measures 1.5 km across, while the channel itself spans just 200 m. Several rock layers are visible along the channel walls, and dunes fill the channel floor. The channel cuts back and forth across the valley floor, which suggests surface water was present in the valley over long time periods.

Written by: Ginny Gulick  (20 July 2023)

Acquisition date
10 June 2023

Local Mars time

Latitude (centered)

Longitude (East)

Spacecraft altitude
295.8 km (183.8 miles)

Original image scale range
59.6 cm/pixel (with 2 x 2 binning) so objects ~179 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection

Emission angle

Phase angle

Solar incidence angle
43°, with the Sun about 47° above the horizon

Solar longitude
75.8°, Northern Spring

For non-map projected images
North azimuth:  97°
Sub-solar azimuth:  4.3°
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

Black and white
map-projected   (125MB)

IRB color
map-projected   (75MB)

Black and white
map-projected  (63MB)
non-map           (85MB)

IRB color
map projected  (21MB)
non-map           (64MB)

Merged IRB
map projected  (127MB)

Merged RGB
map-projected  (120MB)

RGB color
non map           (63MB)
B&W label
Color label
Merged IRB label
Merged RGB label
EDR products

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

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’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.