PDS_VERSION_ID       = PDS3                                                   
RECORD_TYPE          = STREAM                                                 
OBJECT               = TEXT                                                   
  PUBLICATION_DATE     = 1997-09-15                                           
  NOTE                 = "This file describes the contents of this directory."
END_OBJECT           = TEXT                                                   
END                                                                           
This directory contains an ASCII text copy of a paper describing the NAIF     
SPICE system.                                                                 
                                                                              
key files:                                                                    
  INFO.TXT     - (this file) describes directory contents                     
  SPICE.ASC    - ASCII text version of [ACTON1994]                            
                                                                              
SPICE users may also wish to refer to the article [ACTON1996]:                
                                                                              
    Acton, C.H., Ancillary Data Services of NASA's Navigation and             
    Ancillary Information Facility, Planet. Space Sci., Vol. 44,              
    No. 1, pp. 65-70, 1996. (Reference Key ID: ACTON1996)