                          THEMIS: Image Detail

                                                                        
             [1]                                                        
                                                                        
             [2]                                                        
                                                                        
   [3]  [4]  [5]  [6]  [7]                                              
             [8]                                                        
                                                                        
     Knobby Terrain Down                                                
  Under (Released 4 August                                              
            2003)                                                       
                                                                        
  [9] Image Context:                                                    
                                                                        
  Context image credit:                                                 
  NASA/Mars Orbiter Laser                                               
  Altimeter (MOLA) Team                                                 
  [ Find on map:                                                        
  Javascript [10]  version                                              
  ]                                                                     
  [ Find on map: CGI [11]                                               
  version ]                                                             
                                                                        
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  At first glance, this                                                 
  THEMIS visible image                                                  
  appears to show chaotic                                               
  terrain similar to                                                    
  several several other                                                 
  areas which have been                                                 
  shown on this web page                                                
  in recent weeks.                                                      
  However, this knobby                                                  
  terrain is in the                                                     
  southern highlands and                                                
  nearly 100 degrees of                                                 
  longitude away from the                                               
  equatorial chaotic                                                    
  terrain related to the                                                
  giant outflow channels                                                
  in the northern                                                       
  hemisphere. In addition,                                              
  this knobby terrrain                                                  
  does not seem to be                                                   
  inside of any kind of                                                 
  basin, like much of the                                               
  chaotic terrain. What we                                              
  may be seeing here are                                                
  remnants of a rock layer                                              
  that once existed but                                                 
  has been eroding away.                                                
  It is important to note                                               
  that this layer appears                                               
  to have a higher albedo                                               
  (visible brightness)                                                  
  than the surrounding                                                  
  terrain. This may                                                     
  indicate a difference in                                              
  composition or grain                                                  
  size between the knobs                                                
  and the surrounding                                                   
  terrain.                                                              
                                                                        
  [Questions? Email                                                     
  images@themis.asu.edu                                                 
  [12] ]                                                                
                                                                        
  [Source: ASU THEMIS                                                   
  Science Team]                                                         
                                                                        
  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.                                                                 
                                                                        
  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.                                               
                                                                        
  Image Credit:                                                         
  NASA/JPL/Arizona State                                                
  University                                                            
                                                                        
   [ Show Full-Size Image                                               
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    Full-Size Image (JPG)                                               
           [14]  ]                                                      
                                                                        
   [ Show Full-Size Image                                               
    (PNG) [15]  ] [ Show                                                
    Full-Size Image (TIF)                                               
           [16]  ]                                                      
                                                                        
     [ Printer-friendly                                                 
       version [17]  ]                                                  
                                                                        
                  Parameter   Value                Parameter   Value    
                                                                        
                   Latitude   -37.3               Instrument   VIS      
                                                                        
                  Longitude   164.1E          Resolution (m)   19       
                              (195.9W)                                  
                                                                        
        Image Size (pixels)   3094x1315           Image Size   58.8x25  
                                                        (km)            
                                                                        
                                 [18]  [19]                             
                                                                        
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  [8] http://mars.jpl.nasa.gov/odyssey/
  [9] fullimages/20030804a.jpg
  [10]
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mars_js_frames.pl?CENT_LAT=-37.25564398&CENT_LON=164.
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  [11]
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  [13] /fullimages/20030804a.gif
  [14] /fullimages/20030804a.jpg
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  [16] /fullimages/20030804a.tif
  [17] /print-20030804a.html
  [18] http://www.asu.edu/
  [19] http://www.nasa.gov/
