                          THEMIS: Image Detail

                                                                        
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            Hesperia Planum                                             
          (Released 14 October                                          
                 2002)                                                  
                                                                        
                  [15]                                                  
                                                                        
             Image Context:                                             
                                                                        
         Context image credit:                                          
         NASA/Mars Orbiter                                              
         Laser Altimeter                                                
         (MOLA) Team                                                    
                                                                        
             [ Find on map:                                             
            Javascript [16]                                             
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           [ Find on map: CGI                                           
            [17]  version ]                                             
                                                                        
         This image is located                                          
         in the eastern                                                 
         portion of a region                                            
         on Mars called                                                 
         Hesperia Planum,                                               
         which is in the                                                
         cratered southern                                              
         highlands of Mars.                                             
         Immediately visible                                            
         in the image is the                                            
         dark barchan type                                              
         dunes that are being                                           
         blown against the                                              
         southeast wall of the                                          
         crater. The position                                           
         of the dunes in the                                            
         crater as well as the                                          
         southeast facing                                               
         slipfaces on the                                               
         dunes indicate that                                            
         the local winds blow                                           
         primarily towards the                                          
         southeast. An                                                  
         interesting aspect of                                          
         this image is the                                              
         relatively brighter                                            
         ripple like features                                           
         that are visible just                                          
         to the southeast of                                            
         the dune field. These                                          
         features are smaller                                           
         than the dark dunes,                                           
         but can be clearly                                             
         seen in the full                                               
         resolution image.                                              
         Wind processes also                                            
         probably formed these                                          
         features and their                                             
         orientation also                                               
         indicates a                                                    
         northwest-southeast                                            
         wind direction. It is                                          
         not clear if these                                             
         features are actively                                          
         being formed by the                                            
         wind or if they were                                           
         only active at some                                            
         point in the Martian                                           
         past. Mars is a very                                           
         dry, desert-like                                               
         environment and the                                            
         wind plays a very                                              
         important role in                                              
         shaping the present                                            
         landscape.                                                     
                                                                        
         [Questions? Email                                              
         images@themis.asu.edu                                          
         [18] ]                                                         
                                                                        
         [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                                               
                                                                        
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                      Parameter   Value          Parameter   Value      
                                                                        
                       Latitude   -15.6         Instrument   VIS        
                                                                        
                      Longitude   119.2E        Resolution   19         
                                  (240.8W)             (m)              
                                                                        
            Image Size (pixels)   3043x1231     Image Size   57.8x23.4  
                                                      (km)              
                                                                        
                                                                  [24]  
                                                                        
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  [5] http://themis.asu.edu/themis_team.html
  [6] http://tes.asu.edu/neweducation.html
  [7] http://mars.jpl.nasa.gov/odyssey/
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  [10] http://tes.asu.edu/MINITES/
  [11] http://tes.asu.edu/MINITES/
  [12] http://www.asu.edu/
  [13] http://www.nasa.gov/
  [14] latest.html
  [15] fullimages/20021014a.jpg
  [16]
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  [22] /fullimages/20021014a.tif
  [23] /print-20021014a.html
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