PDS_VERSION_ID      = PDS3                                                    
                                                                              
RECORD_TYPE  = FIXED_LENGTH                                                   
RECORD_BYTES = 56                                                             
FILE_RECORDS = 62879                                                          
                                                                              
^TABLE  = "usgsdem.tab"                                                       
                                                                              
DATA_SET_ID           = "DS1-C-MICAS-5-BORRELLY-DEM-V1.0"                     
PRODUCT_ID            = "DS1-USGS-DEM-V1.0"                                   
PRODUCT_NAME          = "USGS DIGITAL ELEVATION MODEL PRODUCED FROM           
                         THE DS1 MICAS IMAGES "                               
PRODUCT_CREATION_TIME = 2003-10-10T13:25                                      
                                                                              
TARGET_NAME           = "19P/BORRELLY 1 (1904 Y2)"                            
INSTRUMENT_HOST_NAME  = "DEEP SPACE 1"                                        
INSTRUMENT_NAME       = "MINIATURE INTEGRATED CAMERA-SPECTROMETER"            
START_TIME            = "N/A"                                                 
STOP_TIME             = "N/A"                                                 
SPACECRAFT_CLOCK_START_COUNT = "N/A"                                          
SPACECRAFT_CLOCK_STOP_COUNT  = "N/A"                                          
                                                                              
DESCRIPTION           = "                                                     
  USGS digital elevation map (DEM) of the nucleus of comet 19P/Borrelly       
  (1904 Y2) created using the MICAS image data.  The axes represent an        
  arbitrary coordinate system based on the images used to generate the map.   
  The X and Y axes form a grid in the plane of the sky, with their origins    
  near the center of mass of the nucleus.  The Z direction represents the     
  elevation of the nucleus at each corresponding grid position.  Z increases  
  toward the observer, with its zero point in the plane that intersects the   
  most distant visible point on the limb.                                     
                                                                              
  From the DEM, the surface normal vectors were computed, and the X, Y and Z  
  coordinates of these vectors are also included in the table.                
                                                                              
  This file represents the consolidation of information from six separate     
  source files, The first two contained the X and Y distances, respectively,  
  for each grid position (with a uniform distance of 16m between grid         
  points).  The third file contained the elevations at each of the            
  corresponding grid positions.  The last three files contained the X, Y and  
  Z components of the surface normal vector at each position.                 
                                                                              
  For each grid point, the six values were extracted from their respective    
  files and entered on a single line in this table.  Entries that contained   
  null values in the source files (e.g. positions that were not on the        
  visible part of the nucleus) were not included.                             
 "                                                                            
                                                                              
OBJECT        = TABLE                                                         
  INTERCHANGE_FORMAT = ASCII                                                  
  COLUMNS     = 6                                                             
  ROW_BYTES   = 56                                                            
  ROWS        = 62879                                                         
  DESCRIPTION = "Digital elevation map and surface normals for the nucleus of 
      Comet 19P/Borrelly"                                                     
                                                                              
  OBJECT        = COLUMN                                                      
    COLUMN_NUMBER = 1                                                         
    NAME          = "X"                                                       
    BYTES         = 5                                                         
    DATA_TYPE     = "ASCII_INTEGER"                                           
    START_BYTE    = 1                                                         
    FORMAT        = "I5"                                                      
    UNIT          = "METER"                                                   
    MINIMUM       = -2792                                                     
    MAXIMUM       =  2248                                                     
    DESCRIPTION   = "Distance along the X-axis from the center of the         
      coordinate system"                                                      
  END_OBJECT                                                                  
                                                                              
  OBJECT        = COLUMN                                                      
    COLUMN_NUMBER = 2                                                         
    NAME          = "Y"                                                       
    BYTES         = 5                                                         
    DATA_TYPE     = "ASCII_INTEGER"                                           
    START_BYTE    = 7                                                         
    FORMAT        = "I5"                                                      
    UNIT          = "METER"                                                   
    MINIMUM       = -3944                                                     
    MAXIMUM       =  3016                                                     
    DESCRIPTION   = "Distance along the Y-axis from the center of the         
      coordinate_system"                                                      
  END_OBJECT                                                                  
                                                                              
  OBJECT        = COLUMN                                                      
    COLUMN_NUMBER = 3                                                         
    NAME          = "Z"                                                       
    BYTES         = 11                                                        
    DATA_TYPE     = "ASCII_REAL"                                              
    START_BYTE    = 13                                                        
    FORMAT        = "F11.6"                                                   
    UNIT          = "METER"                                                   
    MINIMUM       = -103.37   /* Approximately */                             
    MAXIMUM       = 4436.61   /* Approximately */                             
    DESCRIPTION   = "Perpendicular distance above the (X,Y) plane"            
  END_OBJECT                                                                  
                                                                              
  OBJECT        = COLUMN                                                      
    COLUMN_NUMBER = 4                                                         
    NAME          = "NX"                                                      
    BYTES         = 9                                                         
    DATA_TYPE     = "ASCII_REAL"                                              
    START_BYTE    = 26                                                        
    FORMAT        = "F9.6"                                                    
    DESCRIPTION   = "X-component of the unit surface normal vector"           
  END_OBJECT                                                                  
                                                                              
  OBJECT        = COLUMN                                                      
    COLUMN_NUMBER = 5                                                         
    NAME          = "NY"                                                      
    BYTES         = 9                                                         
    DATA_TYPE     = "ASCII_REAL"                                              
    START_BYTE    = 36                                                        
    FORMAT        = "F9.6"                                                    
    DESCRIPTION   = "Y-component of the unit surface normal vector"           
  END_OBJECT                                                                  
                                                                              
  OBJECT        = COLUMN                                                      
    COLUMN_NUMBER = 6                                                         
    NAME          = "NZ"                                                      
    BYTES         = 9                                                         
    DATA_TYPE     = "ASCII_REAL"                                              
    START_BYTE    = 46                                                        
    FORMAT        = "F9.6"                                                    
    DESCRIPTION   = "Z-component of the unit surface normal vector"           
  END_OBJECT                                                                  
                                                                              
END_OBJECT    = TABLE                                                         
                                                                              
END