PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = STREAM                                                  
                                                                              
OBJECT     = TEXT                                                             
  PUBLICATION_DATE = 2000-09-01                                               
  NOTE             = "Description of the GEOMETRY directory                   
                      contents for NEAR MAG archive volumes"                  
END_OBJECT = TEXT                                                             
                                                                              
END                                                                           
                                                                              
All NEAR geometry data are contained in a separate data set with 1 set        
per phase. These data sets contain geometry data in the form of SPICE         
kernels.  The NEAR GEOMETRY datasets are grouped by phase as follows:         
                                                                              
    Phase             PDS Volumes                                             
    -----------       ---------------------------                             
    CRUISE1           NGCRU1_0001                                             
    MATHILDE          NGMATH_0001                                             
    CRUISE2           NGCRU2_0001                                             
    EARTH/FLY/BY      NGERTH_0001                                             
    CRUISE3           NGCRU3_0001                                             
    EROS/FLY/BY       NGERFB_0001                                             
    CRUISE4           NGCRU4_0001                                             
    EROS              NGEROS_0001 - NGEROS_0004                               
    EROS/SURFACE      NGERSF_0001                                             
                                                                              
                                                                              
The data sets contain:                                                        
----------------------                                                        
                                                                              
ik   -- SPICE system for providing instrument orientation to spacecraft.      
ck   -- SPICE system for providing attitude information for spacecraft and    
        instrument platforms.                                                 
ek   -- EROS shape model kernels                                              
fk   -- frames kernel directory. This directory is not used in NEAR           
lsk  -- Leapsecond kernel for providing information to convert between        
        UTC times and any other time system.                                  
pck  -- Models used for rotations of solar system bodies and shapes           
        (constants and matrices of planets and satellites).                   
sclk -- Spacecraft clock kernel modeled against the time system TDT           
        (Terrestrial Dynamical Time).                                         
spk  -- NAIF ephemeris system - planet and spacecraft positions.              
plt  -- SPICE plate model.                                                    
grav -- gravity data.