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MARS EXPRESS: NORTHERN RIM OF HELLAS BASIN
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MARS EXPRESS: NORTHERN RIM OF HELLAS BASIN ESA release 8 July 2004 These images of the rim of the Hellas basin on Mars were obtained by the High Resolution Stereo Camera (HRSC) on board ESA's Mars Express spacecraft. The scenes show a portion of the northern region of the Hellas basin at 29°S latitude and 68°E longitude. They were taken during orbit 488 with a resolution of 18.3 meters per pixel. North is to the right. The Hellas basin is located in the martian southern hemisphere, and is actually a giant impact crater. It is about nine kilometers deep and has a rim diameter of about 2300 kilometers, which makes it one of the largest impact craters in our Solar System. The basin floor is frost-covered in the martian winter and appears bright even in Earth-based telescope observations. These HRSC images show the basin rim, which is strongly dissected by elliptical and concave features, running north-west to south-east, as well as several small impact craters. The elongated smaller basins have most likely been shaped by wind erosion (aeolian processes). A small valley network in the north-western part of the region suggests fluvial activity, meaning possibly action by water. 
Color image of Hellas basin rim. 
Perspective view of Hellas basin rim. The 3D anaglyph image was created using one stereo channel and the nadir (vertical view) channel of the HRSC. The color image was created from the nadir and three color channels. The perspective view was calculated from the digital terrain model derived from the stereo and color information of the image data. Image resolution has been decreased for use on the internet. The 3D images require stereoscopic glasses to view. For more information on Mars Express HRSC images, you might like to read our updated "Frequently Asked Questions" (http://www.esa.int/export/SPECIALS/Mars_Express/SEMJBQXLDMD_0.html). Read the original news release at http://www.esa.int/SPECIALS/Mars_Express/SEMB5UL26WD_0.html. An additional article on this subject is available at http://www.spacedaily.com/news/marsexpress-04q.html. MARS GLOBAL SURVEYOR IMAGES NASA/JPL/MSSS release 1-14 July 2004 The following new images taken by the Mars Orbiter Camera (MOC) on the Mars Global Surveyor spacecraft are now available. Dunes in Noachis (Released 01 July 2004) http://www.msss.com/mars_images/moc/2004/07/01/index.html South Polar Layers (Released 02 July 2004) http://www.msss.com/mars_images/moc/2004/07/02/index.html Sulci Gordii (Released 03 July 2004) http://www.msss.com/mars_images/moc/2004/07/03/index.html Small Dunes in Hellas (Released 04 July 2004) http://www.msss.com/mars_images/moc/2004/07/04/index.html Exhumed Craters (Released 05 July 2004) http://www.msss.com/mars_images/moc/2004/07/05/index.html Dark Mesas of Aram Chao (Released 06 July 2004) http://www.msss.com/mars_images/moc/2004/07/06/index.html Carbon Dioxide Landscape (Released 07 July 2004) http://www.msss.com/mars_images/moc/2004/07/07/index.html Concentric Crater Floor (Released 08 July 2004) http://www.msss.com/mars_images/moc/2004/07/08/index.html Wind Erosion in Tithonium (Released 09 July 2004) http://www.msss.com/mars_images/moc/2004/07/09/index.html Coprates Outcrop (Released 10 July 2004) http://www.msss.com/mars_images/moc/2004/07/10/index.html Nili Buttes and Mesas (Released 11 July 2004) http://www.msss.com/mars_images/moc/2004/07/11/index.html Exposed Crater (Release d12 July 2004) http://www.msss.com/mars_images/moc/2004/07/12/index.html Medusae Sulci Yardangs (Released 13 July 2004) http://www.msss.com/mars_images/moc/2004/07/13/index.html Martian Gullies (Released 14 July 2004) http://www.msss.com/mars_images/moc/2004/07/14/index.html All of the Mars Global Surveyor images are archived at http://www.msss.com/mars_images/moc/index.html. Mars Global Surveyor was launched in November 1996 and has been in Mars orbit since September 1997. It began its primary mapping mission on March 8, 1999. Mars Global Surveyor is the first mission in a long-term program of Mars exploration known as the Mars Surveyor Program that is managed by JPL for NASA's Office of Space Science, Washington, DC. Malin Space Science Systems (MSSS) and the California Institute of Technology built the MOC using spare hardware from the Mars Observer mission. MSSS operates the camera from its facilities in San Diego, CA. The Jet Propulsion Laboratory's Mars Surveyor Operations Project operates the Mars Global Surveyor spacecraft with its industrial partner, Lockheed Martin Astronautics, from facilities in Pasadena, CA and Denver, CO. MARS ODYSSEY THEMIS IMAGES NASA/JPL/ASU release 6-16 July 2004 Dust Devil Days (Released 6 July 20044) http://themis.la.asu.edu/zoom-20040706a.html Kaiser Crater Dust Devils (Released 7 July 2004) http://themis.la.asu.edu/zoom-20040707a.html Plentiful Dust Devils (Released 8 July 2004) http://themis.la.asu.edu/zoom-20040708a.html Southern Dust Devils (Released 9 July 2004) http://themis.la.asu.edu/zoom-20040709a.html Wind Streaks (Released 12 July 2004) http://jpl.convio.net/site/R?i=64oEDSAIgLlO-3BCLCXxIg Windstreaks in Daedalia (Released 13 July 2004) http://jpl.convio.net/site/R?i=H16BNmD-S4BO-3BCLCXxIg Yardangs in Gusev (Released 14 July 2004) http://jpl.convio.net/site/R?i=vj3tykELXy5O-3BCLCXxIg Ejecta Yardangs (Released 15 July 2004) http://jpl.convio.net/site/R?i=hj0XGbqusLxO-3BCLCXxIg Yardang Development (Released 16 July 2004) http://jpl.convio.net/site/R?i=itxr2m_2TMpO-3BCLCXxIg All of the THEMIS images are archived at http://themis.la.asu.edu/latest.html. NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, DC. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena. End Marsbugs, Volume 11, Number 29. 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