On 2 May 2004, the High-Resolution Stereo Camera (HRSC) on board the ESA Mars Express spacecraft obtained images from the central area of the Mars canyon called Valles Marineris.The images were taken at a resolution of approximately 16 metres per pixel. The displayed region is located at the southern rim of the Melas Chasma at Mars latitude 12°S and Mars longitude 285°E. The images were taken on orbit 360 of Mars Express.
This region shows several clues to the morphological and geological development of the Valles Marineris. The images show many traces of volcanic activity and possibly water-related acitivity. However, a lot of the surface has been altered by subsequent geological processes, such as wind erosion and quakes.
Although many questions about the geological development of the Valles Marineris canyon have remained unanswered until now, the detailed HRSC image data may help to find some answers. Using HRSC data, scientists can focus on morphology - the evolution of rocks and land forms. They can also analyse the light relected by the canyon to understand which type of rocks it is made out of. The colour images were created using the HSRC nadir and colour channels.
The perspective view was created by using the stereo channels to a create a digital model of the terrain.
The 3-D image (anaglyph) was produced from the nadir channel together with one stereo channel.
Source: Eurekalert & othersLast reviewed: By John M. Grohol, Psy.D. on 21 Feb 2009
Published on PsychCentral.com. All rights reserved.
If you think you're too small to be effective, you have never been in bed with a mosquito.
-- Bette Reese