PDS_VERSION_ID               = PDS3                                           
                                                                              
/* File Characteristics */                                                    
                                                                              
RECORD_TYPE                  = FIXED_LENGTH                                   
RECORD_BYTES                 = 28                                             
FILE_RECORDS                 = 149423                                         
                                                                              
/* Data Object Pointers */                                                    
                                                                              
^TABLE                       = "smass.tab"                                    
                                                                              
/* Identification Keywords */                                                 
                                                                              
DATA_SET_ID                  = "EAR-A-M3SPEC-3-RDR-SMASS-V1.0"                
PRODUCT_NAME                 = "SMASS Data Table"                             
PRODUCT_ID                   = "SMASS-SMASS-199604"                           
INSTRUMENT_HOST_NAME         = "MICHIGAN-DARTMOUTH-MIT OBSERVATORY"           
INSTRUMENT_NAME              = "MARK III SPECTROGRAPH"                        
TARGET_NAME                  = ASTEROID                                       
START_TIME                   = 1990                                           
STOP_TIME                    = 1994                                           
PRODUCT_CREATION_TIME        = 1996-03-29  /* Peer Review Date */             
RECORD_FORMAT                = "(i5,1x,a8,1x,i5,1x,f5.3)"                     
                                                                              
/* Data Object Descriptions */                                                
                                                                              
OBJECT                       = TABLE                                          
 ROWS                        = 149423                                         
 ROW_BYTES                   = 28                                             
 INTERCHANGE_FORMAT          = ASCII                                          
 COLUMNS                     = 4                                              
 DESCRIPTION                 = "This is the main data file for the            
Small Main-belt Asteroid Spectroscopic Survey (SMASS).  It contains           
reflectances scaled to 5500 A as a function of wavelength.  316               
asteroids are included in the survey, and the data for all the asteroids      
is concatenated in this file.  An index to the individual asteroid            
spectra is to be found in SMASSNDX.TAB."                                      
                                                                              
 OBJECT                      = COLUMN                                         
  COLUMN_NUMBER              = 1                                              
  NAME                       = "ASTEROID CATALOG NUMBER"                      
  DESCRIPTION                = "For unnumbered asteroids, this field will     
be blank.  For these asteroids, see the next field, ASTEROID PROVISIONAL      
DESIGNATION, for the identification of the asteroid."                         
  DATA_TYPE                  = ASCII_INTEGER                                  
  START_BYTE                 = 1                                              
  BYTES                      = 5                                              
  FORMAT                     = I5                                             
 END_OBJECT                  = COLUMN                                         
                                                                              
 OBJECT                      = COLUMN                                         
  COLUMN_NUMBER              = 2                                              
  NAME                       = "ASTEROID PROVISIONAL DESIGNATION"             
  DESCRIPTION                = "For numbered asteroids, this field will       
be blank.  For these asteroids, see the previous field, ASTEROID CATALOG      
NUMBER, for the asteroid identification."                                     
  DATA_TYPE                  = CHARACTER                                      
  START_BYTE                 = 7                                              
  BYTES                      = 8                                              
  FORMAT                     = A8                                             
 END_OBJECT                  = COLUMN                                         
                                                                              
 OBJECT                      = COLUMN                                         
  COLUMN_NUMBER              = 3                                              
  NAME                       = "WAVELENGTH"                                   
  DESCRIPTION                = "Wavelength, in angstroms, at which the        
reflectance was measured."                                                    
  UNIT                       = "ANGSTROM"                                     
  DATA_TYPE                  = ASCII_INTEGER                                  
  START_BYTE                 = 16                                             
  BYTES                      = 5                                              
  FORMAT                     = I5                                             
 END_OBJECT                  = COLUMN                                         
                                                                              
 OBJECT                      = COLUMN                                         
  COLUMN_NUMBER              = 4                                              
  NAME                       = "SCALED REFLECTANCE"                           
  DESCRIPTION                = "Reflectance scaled to 5500 Angstroms.         
Because there are rarely any reflectance values at precisely 5500 Anstroms,   
normalization was performed at 5500 Angstroms on a polynomial fit to the      
spectra.  Due to noise, the reflectance values straddling 5500 Angstroms      
may not straddle the a reflectance of unity."                                 
  DATA_TYPE                  = ASCII_REAL                                     
  START_BYTE                 = 22                                             
  BYTES                      = 5                                              
  FORMAT                     = "F5.3"                                         
 END_OBJECT                  = COLUMN                                         
                                                                              
END_OBJECT                   = TABLE                                          
END