HiRISE | From Low to High Channels (ESP_078858

NASA/JPL-Caltech/UArizona

From Low to High Channels
ESP_078858_2120 Science Theme: Geologic Contacts/Stratigraphy

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This image shows the transition from a regular channel to an inverted channel in Arabia Terra. The channel was once flowing with water that carved down into the bedrock to produce a depression.

As the water flow slowed down, sediment became deposited within the channel that caused it to partially fill up. Over time, the landscape around the channel eroded away faster than the sediments within the channel, leaving behind a portion that now stands above the terrain, called an inverted channel. Why only one section of the channel is inverted while the rest is still a depression is unclear, but may reflect the local topography and hardness of the neighboring materials that only protected the channel in some places.

Written by: Cathy Weitz (narration: Tre Gibbs) (15 August 2023)

This is a stereo pair with ESP_078924_2120.

Acquisition date
23 May 2023

Local Mars time
15:03

Latitude (centered)
31.857°

Longitude (East)
49.411°

Spacecraft altitude
290.2 km (180.3 miles)

Original image scale range
63.1 cm/pixel (with 2 x 2 binning) so objects ~189 cm across are resolved

Map projected scale
50 cm/pixel and North is up

Map projection
Equirectangular

Emission angle
24.3°

Phase angle
65.3°

Solar incidence angle
41°, with the Sun about 49° above the horizon

Solar longitude
68.1°, Northern Spring

For non-map projected images
North azimuth: 97°
Sub-solar azimuth: 7.8°

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   (275MB)

IRB color
map-projected   (152MB)

JP2 EXTRAS
Black and white
map-projected (142MB)
non-map           (141MB)

IRB color
map projected (59MB)
non-map           (114MB)

Merged IRB
map projected (302MB)

Merged RGB
map-projected (281MB)

RGB color
non map           (108MB)

ANAGLYPHS
Map-projected, reduced-resolution
Full resolution JP2 download
Anaglyph details page

BONUS
4K (TIFF)
8K (TIFF)
10K (TIFF)

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.