PDS_VERSION_ID      = PDS3                                                    
RECORD_TYPE         = STREAM                   
OBJECT              = TEXT                                                    
  PUBLICATION_DATE    =  2007-06-06
  NOTE                = "Description of contents of EXTRAS directory"       
END_OBJECT          = TEXT                                                    
END                                                                           
                                                                              
                                                                              
     The EXTRAS directory contains additional files provided by data preparer
for a better understanding of the data and data processing.                   
                                                                              
     The files evolved as the mission progressed; users should refer to the   
files on the most recent (highest numbered) archive volume for the most       
up-to-date information.  Files on early volumes may be only 'place-holders.'  
                                                                              
Structure of the EXTRAS directory:

EXTRAS
   |
   |- ANCILLARY
   |      |
   |      |- ESOC - OASW         
   |      |           |          
   |      |           |- DATA    Relevant DDS-files to describe the 
   |      |                      observation geometry 
   |      |                      (Orbit- and Attitudefiles for example).
   |      |           
   |      |           
   |      |
   |      |- SPICE               Relevant SPICE Kernels to describe the obser-
   |      |    |                 vation geometry. For further details on each
   |      |    |- AAREADME.TXT   subfolder look into AAREADME.TXT. There is
   |      |    |- CK             also an AAREADME.TXT in each subfolder.
   |      |    |- EK
   |      |    |- FK
   |      |    |- IK
   |      |    |- LSK
   |      |    |- ORBNUM
   |      |    |- PCK
   |      |    |- SCLK
   |      |    |- SPK
   |      |   
   |      |                                                                
   |      |- UNI_BW              Relevant PREDICT files from the UNI BW, 
   |      |                                                      Munich.
   |      |- MRS
   |      |   |
   |      |   |-LOGFILES         These are LOGFILES which contain 
   |      |                      information of the level 2 Doppler and 
   |      |                      Ranging data processing. These filenames have
   |      |                      fileextension .LOG and they have except for
   |      |                      the file extension the same file names as the
   |      |                      corresponding Level 2 data files.  
   |      |                                                                   
   |      |
   |      |- SUE
   |      |   |
   |      |   |- SPICE           Modified Spcie kernels combined with JPL  
   |      |   
   |      | 
   |      |- DSN
   |      |   | 
   |      |   |- EOP             Earth Orientation Parameter files
   |      |   |- OPT             Orbit propagation and timing File
   |      |   |- LIT             Light time files



For further information about ESOC flight dynamics orbit or attitude files and
accompanying software please refer to ftp://solarsystem.estec.esa.nl in folder
pub/projects/MEX/data/flight_dynamics.