Mission Mars Odyssey - 2

<h1>PIA04456: Acidalia Planitia</h1><div class="PIA04456" lang="en" style="width:551px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04456_context.jpg"></a><br><p>The small mounds with summit depressions in the northern portion of this image have an unknown origin. Some scientists think they may be cinder cones, while others think they may be pseudocraters, formed by the interaction of lava and ice. These features are also observed in other areas of Mars' northern plains, such as Isidis Planitia.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude XX, Longitude XX East (XX West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04456" onclick="window.open(this.href); return false;" title="Voir l'image PIA04456: Acidalia Planitia sur le site de la NASA">Voir l'image PIA04456: Acidalia Planitia sur le site de la NASA.</a></div>
PIA04456: Acidalia Planitia
<h1>PIA04457: Surface Erosion and Flow</h1><div class="PIA04457" lang="en" style="width:556px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04457_context.jpg"></a><br><p>Released 7 April 2003<p>The mottled surface texture and flow features observed in this THEMIS image suggest materials may be, or have been, mixed with ice. There is also evidence in some areas for infilling of sediments as crater rims and ridges appear covered.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 45.3, Longitude 48.8 East (311.2 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04457" onclick="window.open(this.href); return false;" title="Voir l'image PIA04457: Surface Erosion and Flow sur le site de la NASA">Voir l'image PIA04457: Surface Erosion and Flow sur le site de la NASA.</a></div>
PIA04457: Surface Erosion and Flow
<h1>PIA04458: Olympica Fossae</h1><div class="PIA04458" lang="en" style="width:482px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04458_context.jpg"></a><br><p>Released 8 April 2003<p>Olympica Fossae channel system located east of the Olympus Mons volcano in Tharsis. These anastomosing channels cut numerous lava flows indicating that the channels are younger than the lava flows. Some channels appear to be structurally controlled. These channels are most likely generated by volcano-ground ice interactions.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 24.9, Longitude 246.3 East (133.8 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04458" onclick="window.open(this.href); return false;" title="Voir l'image PIA04458: Olympica Fossae sur le site de la NASA">Voir l'image PIA04458: Olympica Fossae sur le site de la NASA.</a></div>
PIA04458: Olympica Fossae
<h1>PIA04459: Chipped Paint Crater</h1><div class="PIA04459" lang="en" style="width:593px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04459_context.jpg"></a><br><p>Released 9 April 2003<p>In the high northern latitudes NW of Alba Patera, a smooth mantle of material that covers the landscape appears chipped away from the rim of a large crater. The prominent scarp that has formed from the retreat of the mantle lacks the rounded appearance of other ice-rich mantles found in the mid-latitudes. The nature of this mantling layer therefore is more enigmatic.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 62.9, Longitude 226.2 East (133.8 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04459" onclick="window.open(this.href); return false;" title="Voir l'image PIA04459: Chipped Paint Crater sur le site de la NASA">Voir l'image PIA04459: Chipped Paint Crater sur le site de la NASA.</a></div>
PIA04459: Chipped Paint Crater
<h1>PIA04461: Ismenia Fossae: Craters or Pits?</h1><div class="PIA04461" lang="en" style="width:473px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04461_context.jpg"></a><br><p>Released 10 April 2003<p>The circular depressions prevalent throughout this scene at first glance appear to be craters, but are they? Could they be pits formed by devolatilization? It is not clear. We are studying these features in search of answers. Once again, another example of a Martian mystery.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 39.4, Longitude 40.9 East (319.1 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04461" onclick="window.open(this.href); return false;" title="Voir l'image PIA04461: Ismenia Fossae: Craters or Pits? sur le site de la NASA">Voir l'image PIA04461: Ismenia Fossae: Craters or Pits? sur le site de la NASA.</a></div>
PIA04461: Ismenia Fossae: Craters or Pits?
<h1>PIA04462: Ridges</h1><div class="PIA04462" lang="en" style="width:483px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04462_context.jpg"></a><br><p>Released 11 April 2003<p>Tall narrow ridges snake between mesas and buttes. Where one such ridge crosses a flat-topped mesa (in the lower center of the image), the mesa surface is split into two surfaces of different heights, like a split-level house. This suggests that the ridges, like the mesas and buttes, are erosional remnants of a former surface that has since been mostly stripped away.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 28.2, Longitude 28 East (332 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04462" onclick="window.open(this.href); return false;" title="Voir l'image PIA04462: Ridges sur le site de la NASA">Voir l'image PIA04462: Ridges sur le site de la NASA.</a></div>
PIA04462: Ridges
<h1>PIA04463: Textured Terrain</h1><div class="PIA04463" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04463_context.jpg"></a><br><p>Released 14 April 2003<p>Hummocky, textured terrain within lava flows northwest of Pavonis Mons, one of the Tharsis volcanoes.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 6.9, Longitude 243.7 East (116.3 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04463" onclick="window.open(this.href); return false;" title="Voir l'image PIA04463: Textured Terrain sur le site de la NASA">Voir l'image PIA04463: Textured Terrain sur le site de la NASA.</a></div>
PIA04463: Textured Terrain
<h1>PIA04464: Medusae Fossae Yardangs</h1><div class="PIA04464" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04464_context.jpg"></a><br><p>Released 15 April 2003<p>The Medusae Fossae formation is an enigmatic pile of eroding sediments that spans over 5000 km in discontinuous masses along the martian equator. The yardang ridges, formed from the scouring action of windblown sand, are a characteristic feature of this formation. In this image, there is evidence for a period of erosion when winds scoured the surface at nearly right angles to the prominent yardang direction.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude -5.1, Longitude 184.4 East (175.6 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04464" onclick="window.open(this.href); return false;" title="Voir l'image PIA04464: Medusae Fossae Yardangs sur le site de la NASA">Voir l'image PIA04464: Medusae Fossae Yardangs sur le site de la NASA.</a></div>
PIA04464: Medusae Fossae Yardangs
<h1>PIA04466: Ascraeus Mons</h1><div class="PIA04466" lang="en" style="width:489px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04466_context.jpg"></a><br><p>Released 16 April 2003<p>The surface textures observed in this THEMIS image of Ascraeus Mons are due to different volcanic flow types. Textural variations can be produced under a variety of different conditions such as varying cooling and flow rates. Also observed in the image are linear chains of craters that could be windows into lava tubes or secondary impact craters.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 11.1, Longitude 256.3 East (103.7 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04466" onclick="window.open(this.href); return false;" title="Voir l'image PIA04466: Ascraeus Mons sur le site de la NASA">Voir l'image PIA04466: Ascraeus Mons sur le site de la NASA.</a></div>
PIA04466: Ascraeus Mons
<h1>PIA04469: Northeastern Meridiani</h1><div class="PIA04469" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04469_context.jpg"></a><br><p>The remarkable terrain at the "center" of the planet (0 degrees latitude and longitude) is called Meridiani Planum. It hosts a rare occurrence of gray crystalline hematite that will be visited by one of the two Mars Exploration Rovers leaving Earth this June. Just to the ENE of the hematite deposit is the eroded, layered terrain seen in this image, which lacks spectral evidence for hematite.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 2.3, Longitude 3.6 East (365.4 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04469" onclick="window.open(this.href); return false;" title="Voir l'image PIA04469: Northeastern Meridiani sur le site de la NASA">Voir l'image PIA04469: Northeastern Meridiani sur le site de la NASA.</a></div>
PIA04469: Northeastern Meridiani
<h1>PIA04470: Lucus Planum</h1><div class="PIA04470" lang="en" style="width:488px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04470_context.jpg"></a><br><p>A crazy cacophony of bizarre surface features in Lucus Planum.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 1.3, Longitude 175.5 East (184.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04470" onclick="window.open(this.href); return false;" title="Voir l'image PIA04470: Lucus Planum sur le site de la NASA">Voir l'image PIA04470: Lucus Planum sur le site de la NASA.</a></div>
PIA04470: Lucus Planum
<h1>PIA04471: Crosscutting Grabens</h1><div class="PIA04471" lang="en" style="width:468px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04471_context.jpg"></a><br><p>Released 21 April 2003<p>The crosscutting relationships observed in this THEMIS image can be used to determine the relative timing of graben and channel formations. Several north-west/south-east trending fractures are observed to crosscut north-east/south-west formations.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 43.2, Longitude 269.4 East (90.6 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04471" onclick="window.open(this.href); return false;" title="Voir l'image PIA04471: Crosscutting Grabens sur le site de la NASA">Voir l'image PIA04471: Crosscutting Grabens sur le site de la NASA.</a></div>
PIA04471: Crosscutting Grabens
<h1>PIA04478: Erosion and Wind Deposition</h1><div class="PIA04478" lang="en" style="width:491px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04478_context.jpg"></a><br><p>Released 22 April 2003<p>Streamlined buttes and mesas are left as remnants of an erosive wind that has carried away sediments and even the rim of a small crater. Two wind directions are apparent in the buttes and mesas that cross each other at 90 degrees. Small dark dunes wind their way between the remnant towers, indicating that the work of the wind is an ongoing process.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 5.3, Longitude 350.1 East (9.9 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04478" onclick="window.open(this.href); return false;" title="Voir l'image PIA04478: Erosion and Wind Deposition sur le site de la NASA">Voir l'image PIA04478: Erosion and Wind Deposition sur le site de la NASA.</a></div>
PIA04478: Erosion and Wind Deposition
<h1>PIA04479: Embayment</h1><div class="PIA04479" lang="en" style="width:469px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04479_context.jpg"></a><br><p>Released 23 April 2003<p>Embayment relationship displayed where mottled plains material laps up against higher standing plains material. The embaying material could be lava or possibly mud.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 44.8, Longitude 10 East (350 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04479" onclick="window.open(this.href); return false;" title="Voir l'image PIA04479: Embayment sur le site de la NASA">Voir l'image PIA04479: Embayment sur le site de la NASA.</a></div>
PIA04479: Embayment
<h1>PIA04480: Is It Snow?</h1><div class="PIA04480" lang="en" style="width:459px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04480_context.jpg"></a><br><p>Released 25 April 2003<p>Amidst the hummocky topography produced by the ejecta from Lyot crater, smooth patches of material fill shallow depressions. Most researchers would agree that ice probably is a component of the smooth material and has a role in producing the unusual style of erosion seen in this image. But is it ice rich sediment or ice covered by sediment?<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 53.5, Longitude 22.8 East (337.2 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04480" onclick="window.open(this.href); return false;" title="Voir l'image PIA04480: Is It Snow? sur le site de la NASA">Voir l'image PIA04480: Is It Snow? sur le site de la NASA.</a></div>
PIA04480: Is It Snow?
<h1>PIA04482: Lycus Sulci</h1><div class="PIA04482" lang="en" style="width:481px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04482_context.jpg"></a><br><p>Released 28 April 2003<p>Lots of lava flows in Lycus Sulci. Notice the streamlined features near the bottom of the images indicating the flow direction. This image is located near Olympus Mons, a gargantuan volcano that is roughly the size of the state of Arizona.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 26.2, Longitude 232.8 East (127.2 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04482" onclick="window.open(this.href); return false;" title="Voir l'image PIA04482: Lycus Sulci sur le site de la NASA">Voir l'image PIA04482: Lycus Sulci sur le site de la NASA.</a></div>
PIA04482: Lycus Sulci
<h1>PIA04489: Western Amazonis Flow Features and Crater Interaction</h1><div class="PIA04489" lang="en" style="width:484px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04489_context.jpg"></a><br><p>Released 30 April 2003<p>The predominant feature in this THEMIS image is a large flooded crater. Are the flows lava or mud? Scientists don't agree. Once again Mars has one up on us Earthbound humans!<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 26.9, Longitude 191.1 East (168.9 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04489" onclick="window.open(this.href); return false;" title="Voir l'image PIA04489: Western Amazonis Flow Features and Crater Interaction sur le site de la NASA">Voir l'image PIA04489: Western Amazonis Flow Features and Crater Interaction sur le site de la NASA.</a></div>
PIA04489: Western Amazonis Flow Features and Crater Interaction
<h1>PIA04490: Eroded Ejecta</h1><div class="PIA04490" lang="en" style="width:490px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04490_context.jpg"></a><br><p>Released 1 May 2003<p>The ejecta material of the impact crater observed in this THEMIS image is partly eroded as the trend of a regional geologic unit is beginning to emerge from beneath, or actively form on top of, the blanket. The MOLA context image shows the northwest-southeast trend of the underlying unit observed in the bottom half of the THEMIS image at a regional scale.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 8.8, Longitude 202.5 East (157.5 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04490" onclick="window.open(this.href); return false;" title="Voir l'image PIA04490: Eroded Ejecta sur le site de la NASA">Voir l'image PIA04490: Eroded Ejecta sur le site de la NASA.</a></div>
PIA04490: Eroded Ejecta
<h1>PIA04491: Martian Kanji</h1><div class="PIA04491" lang="en" style="width:532px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04491_context.jpg"></a><br><p>Released 2 May 2003<p>On the northeast flank of the 27 km-high volcano Ascraeus Mons, a set of collapse pits and troughs vaguely resemble the symbols of an Asian language. This image shows a range of landforms that are produced by flowing lava and its aftermath: surface flow lobes and channels, source pits, lava tubes, and collapse depressions.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p>Image information: VIS instrument. Latitude 13.5, Longitude 257.9 East (102.1 West). 19 meter/pixel resolution.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04491" onclick="window.open(this.href); return false;" title="Voir l'image PIA04491: Martian Kanji sur le site de la NASA">Voir l'image PIA04491: Martian Kanji sur le site de la NASA.</a></div>
PIA04491: Martian Kanji
<h1>PIA04503: Volcano Vents</h1><div class="PIA04503" lang="en" style="width:535px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04503_context.jpg"></a><br><p>Released 5 May 2003<p>This low-relief shield volcano imaged with the THEMIS visible camera has two large vents which have erupted several individual lava flows. The positions of the origins of many of the flows indicate that it is probable that the vents are secondary structures that formed only after the shield was built up by eruptions from a central caldera.<p>Image information: VIS instrument. Latitude 17.6, Longitude 243.6 East (116.4 West). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04503" onclick="window.open(this.href); return false;" title="Voir l'image PIA04503: Volcano Vents sur le site de la NASA">Voir l'image PIA04503: Volcano Vents sur le site de la NASA.</a></div>
PIA04503: Volcano Vents
<h1>PIA04504: Craters, Pit Chains, and Graben, Oh My!</h1><div class="PIA04504" lang="en" style="width:542px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04504_context.jpg"></a><br><p>Released 6 May 2003<p>Craters, pit chains, graben, and lava flows south of Alba Patera, a volcano located within the Tharsis volcanic complex.<p>Image information: VIS instrument. Latitude 27.1, Longitude 245 East (115 West). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04504" onclick="window.open(this.href); return false;" title="Voir l'image PIA04504: Craters, Pit Chains, and Graben, Oh My! sur le site de la NASA">Voir l'image PIA04504: Craters, Pit Chains, and Graben, Oh My! sur le site de la NASA.</a></div>
PIA04504: Craters, Pit Chains, and Graben, Oh My!
<h1>PIA04505: Deposition + Erosion = Textures</h1><div class="PIA04505" lang="en" style="width:522px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04505_context.jpg"></a><br><p>Released 7 May 2003<p>Toward the westernmost extent of the Medusae Fossae Formation, a 5000+ km long belt of eroding sediments, the interleaving of erosional surfaces produces dramatic textural variations. In the lower third of this image, the cross-hatched MFF layer is being stripped back from a surface that was already heavily eroded before the MFF layer was deposited. Also, note the sinuous and, in places, dendritic ridges that are either linear dunes or inverted channels.<p>Image information: VIS instrument. Latitude -3.9, Longitude 154.1East (205.9). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04505" onclick="window.open(this.href); return false;" title="Voir l'image PIA04505: Deposition + Erosion = Textures sur le site de la NASA">Voir l'image PIA04505: Deposition + Erosion = Textures sur le site de la NASA.</a></div>
PIA04505: Deposition + Erosion = Textures
<h1>PIA04506: Surface Textures</h1><div class="PIA04506" lang="en" style="width:549px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04506_context.jpg"></a><br><p>Released 8 May 2003<p>The variable surface textures observed in this THEMIS image are the result of different lava flow units. Flow fronts indicate material was once semi-fluid and filled in pre-existing impact craters. Channels observed in the eastern half of the image suggest additional materials may have once flowed and eroded older units.<p>Image information: VIS instrument. Latitude 36.5, Longitude 217.6East (142.4). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04506" onclick="window.open(this.href); return false;" title="Voir l'image PIA04506: Surface Textures sur le site de la NASA">Voir l'image PIA04506: Surface Textures sur le site de la NASA.</a></div>
PIA04506: Surface Textures
<h1>PIA04510: Flow Along Valley Floors</h1><div class="PIA04510" lang="en" style="width:552px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04510_context.jpg"></a><br><p>Released 9 May 2003<p>Lines indicative of flow in a valley floor (east to west) cut across similar lines in a slightly smaller valley (southeast to northwest), indicating both that material flowed along the valley floor (as opposed to across it) and that relative flow ages may be determined from crosscutting relationships.<p>Image information: VIS instrument. Latitude 39.6, Longitude 31.1East (328.9). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04510" onclick="window.open(this.href); return false;" title="Voir l'image PIA04510: Flow Along Valley Floors sur le site de la NASA">Voir l'image PIA04510: Flow Along Valley Floors sur le site de la NASA.</a></div>
PIA04510: Flow Along Valley Floors
<h1>PIA04511: Layers Upon Layers</h1><div class="PIA04511" lang="en" style="width:487px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04511_context.jpg"></a><br><p>Released 12 May 2003<p>A cliff of many terraces steps down from the south to the north in this image, showing many successive layers of material now eroded and exposed to the wind. A relatively thick and bright layer comprises one of the lowest strata, appearing more fluted and scarred by the wind than upper layers. Small bright bedforms near the terraces are probably composed of particulate material shed from this bright layer.<p>Image information: VIS instrument. Latitude -9.8, Longitude 285.4East (74.6). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04511" onclick="window.open(this.href); return false;" title="Voir l'image PIA04511: Layers Upon Layers sur le site de la NASA">Voir l'image PIA04511: Layers Upon Layers sur le site de la NASA.</a></div>
PIA04511: Layers Upon Layers
<h1>PIA04512: Ground Patterns</h1><div class="PIA04512" lang="en" style="width:520px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04512_context.jpg"></a><br><p>Released 13 May 2003<p>Goofy ground patterns near the striking split between the Martian southern highlands and northern lowlands.<p>Image information: VIS instrument. Latitude -4.7, Longitude 211.7East (148.3). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04512" onclick="window.open(this.href); return false;" title="Voir l'image PIA04512: Ground Patterns sur le site de la NASA">Voir l'image PIA04512: Ground Patterns sur le site de la NASA.</a></div>
PIA04512: Ground Patterns
<h1>PIA04513: Nili Patera</h1><div class="PIA04513" lang="en" style="width:529px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04513_context.jpg"></a><br><p>Released 14 May 2003<p>At the summit of the low-relief shield volcano Syrtis Major, the caldera known as Nili Patera hosts a remarkable field of barchan-like dunes. The rugged knob to the north of the dunes is probably a breached volcanic cone representing one of the last eruptive events from this caldera.<p>Image information: VIS instrument. Latitude 9, Longitude 67.4East (292.6). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04513" onclick="window.open(this.href); return false;" title="Voir l'image PIA04513: Nili Patera sur le site de la NASA">Voir l'image PIA04513: Nili Patera sur le site de la NASA.</a></div>
PIA04513: Nili Patera
<h1>PIA04522: Unusual Crater</h1><div class="PIA04522" lang="en" style="width:534px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04522_context.jpg"></a><br><p>Released 15 May 2003<p>This unusual crater northeast of Ascraeus Mons displays an ejecta blanket that appears turned up around its edges. This may be a type of rampart crater, or may instead be a crater with its ejecta blanket buried by lava flows. These flows were later eroded away in places leaving behind the scarp. Numerous lava flows are seen in this image as well as sinuous channels. These features appear to be both volcanic (rilles) and fluvial channels.<p>Image information: VIS instrument. Latitude 16.8, Longitude 257.4East (102.6). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04522" onclick="window.open(this.href); return false;" title="Voir l'image PIA04522: Unusual Crater sur le site de la NASA">Voir l'image PIA04522: Unusual Crater sur le site de la NASA.</a></div>
PIA04522: Unusual Crater
<h1>PIA04523: Streamlined Hills of Maja Vallis</h1><div class="PIA04523" lang="en" style="width:533px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04523_context.jpg"></a><br><p>Released 16 May 2003<p>Classic catastrophic flood morphology (streamlined hills and longitudinal grooves) is captured in this image of Lunae Planum. Similar features (although much smaller in size) are seen in terrestrial catastrophic flood regions such as Channeled Scabland of Washington state and in Iceland.<p>Image information: VIS instrument. Latitude 14.8, Longitude 301.8East (58.2). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04523" onclick="window.open(this.href); return false;" title="Voir l'image PIA04523: Streamlined Hills of Maja Vallis sur le site de la NASA">Voir l'image PIA04523: Streamlined Hills of Maja Vallis sur le site de la NASA.</a></div>
PIA04523: Streamlined Hills of Maja Vallis
<h1>PIA04534: Fine-scale Textures</h1><div class="PIA04534" lang="en" style="width:530px;text-align:left;margin:auto;background-color:#000;padding:10px;max-height:150px;overflow:auto;"><p><a href="/figures/PIA04534_context.jpg"></a><br><p>Released 19 May 2003<p>This image shows fine-scale textures around a crater southwest of Athabasca Vallis. These fine scale ridges are most likely the remnants of older flood eroded layered rocks and not longitudinal grooves carved out of the landscape by flooding. These features are ridges and not grooves. Also note the layers visible on the southeast side of the island.<p>Image information: VIS instrument. Latitude 9.6, Longitude 155.9 East (204.1). 19 meter/pixel resolution.<p>Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.<p>NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. 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.<p><br /><br /><a href="http://photojournal.jpl.nasa.gov/catalog/PIA04534" onclick="window.open(this.href); return false;" title="Voir l'image PIA04534: Fine-scale Textures sur le site de la NASA">Voir l'image PIA04534: Fine-scale Textures sur le site de la NASA.</a></div>
PIA04534: Fine-scale Textures

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