PDS_VERSION_ID          = PDS3                                                
RECORD_TYPE             = "STREAM"                                            
                                                                              
OBJECT                  = TEXT                                                
   INTERCHANGE_FORMAT   = "ASCII"                                             
   PUBLICATION_DATE     = 2006-09-29                                          
   NOTE                 = "                                                   
     This file lists the definitions submitted to the PDS Engineering Node    
     for inclusion in the Planetary Science Data Dictionary.  The keywords    
     had not finished the review process by the time the data were delivered. 
     Users should note that definitions may vary slightly because of changes  
     made in review.                                                          
     "                                                                        
END_OBJECT              = TEXT                                                
                                                                              
END                                                                           
                                                                              
                                                                              
  EARTH_TARGET_POSITION_VECTOR                                                
    This element provides the x-, y-, z- components of the position vector    
    from the earth to the target, expressed in J2000 coordinates,             
    corrected for light time and stellar aberration and evaluated at          
    the epoch at which the image was taken.                                   
                                                                              
  EARTH_TARGET_VELOCITY_VECTOR                                                
    This element provides the x-, y-, z- components of the velocity vector    
    of the earth relative to the target, expressed in J2000 coordinates,      
    corrected for light time and stellar aberration and evaluated at          
    the epoch at which the image was taken.                                   
                                                                              
  MID_JULIAN_DATE_VALUE                                                       
     This element provides the full Julian date (i.e., including date         
     fraction) of the mid-point of an observation or event.  Julian dates     
     are expressed as real numbers.  Note that this keyword contains          
     the full Julian date, not the modified Julian date.                      
                                                                              
  SC_EARTH_POSITION_VECTOR                                                    
    This element provides the x-, y-, z- components of the position vector    
    from the spacecraft to the earth, expressed in J2000 coordinates,         
    corrected for light time and stellar aberration and evaluated at          
    the epoch at which the image was taken.                                   
                                                                              
  SC_GEOCENTRIC_DISTANCE                                                      
    This element provides the distance from the center of the earth to the    
    spacecraft.  The default unit is kilometer.                               
                                                                              
  START_JULIAN_DATE_VALUE                                                     
     This element provides the full Julian date (i.e., including date         
     fraction) of the start of an observation or event.  Julian dates         
     are expressed as real numbers.  Note that this keyword contains          
     the full Julian date, not the modified Julian date.                      
                                                                              
  STOP_JULIAN_DATE_VALUE                                                      
     This element provides the full Julian date (i.e., including date         
     fraction) of the end of an observation or event.  Julian dates           
     are expressed as real numbers.  Note that this keyword contains          
     the full Julian date, not the modified Julian date.                      
                                                                              
  TARGET_GEOCENTRIC_DISTANCE                                                  
    This element provides the distance from the center of the earth           
    to the center of the target of an observation at the time of the          
    observation.  The default unit is kilometers. 'Center' is generally       
    taken as center of figure, although in some higher-level products         
    it may be center of mass.  Users should consult the data                  
    set documentation to determine which is presented in those                
    cases where the difference might be significant.                          
                                                                              
  TARGET_HELIOCENTRIC_DISTANCE                                                
    This element provides the distance from the sun to the target             
    of an observation at the time of the observation.  The default            
    unit is kilometers. 'Center' is generally taken as center of              
    figure, although in some higher-level products it may be center           
    of mass.  Users should consult the data set documentation to              
    determine which is presented in those cases where the difference          
    might be significant.                                                     
                                                                              
  TARGET_SUN_POSITION_VECTOR                                                  
    This element provides the x-, y-, z- components of the position vector    
    from the target to the sun expressed in J2000 coordinates,                
    corrected for light time and stellar aberration and evaluated at          
    the epoch at which the image was taken.                                   
                                                                              
  TARGET_SUN_VELOCITY_VECTOR                                                  
    This element provides the x-, y-, z- components of the velocity vector    
    of the target relative to the sun, expressed in J2000 coordinates,        
    corrected for light time and stellar aberration and evaluated at          
    the epoch at which the image was taken.