PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2006-03-08
   NOTE                 = "SP-Kernel Information"
END_OBJECT              = TEXT
                                                                     
END 

General information about SPICE SP-kernels
==========================================

   The purpose of the SP-kernel -- which stands for S(pacecraft) and
   P(lanet) Kernel -- is to allow ephemerides for any collection of
   solar system bodies, spacecraft or any other objects in 3D space
   to be combined under a common file format, and accessed by a common
   set of subroutines.
   
   The SPK format is supported by a collection of subroutines that
   are part of the SPICELIB library, the major component of the NAIF
   Toolkit. These subroutines can be integrated into user application
   programs. The SPICE system toolkit for a number of computer platforms
   or information regarding how it can be obtained is located in the
   SOFTWARE subdirectory of the main directory of this dataset. 
   
   To use SP-kernels, a Leapseconds (LSK) is required.  Also, to use
   SP-Kernels containing positions given relative to the non-inertial
   and project-defined frames, a Frame Definitions (FRAMES) and
   Planetary Constants (PcK) files are required.
   
   Refer to the SPK.REQ document provided with the toolkit or available
   from the NAIF Node of PDS if SPICE toolkit is not included with this
   data set to get more information on how to access SP-kernel data.


Stardust SP-kernels provided in this directory 
==============================================

   The following binary SPK files are present in this volume (only file
   names are shown; the file name extensions of the binary SPK files are
   always ".bsp"):

      sdu_l_YYYY[_vX]   Stardust reconstructed trajectory SPK files
                        created by SDU NAV Team, JPL. Each of these
                        files covers the year specified by the YYYY
                        token of the name. The file for the year 2003
                        also covers the first half of January 2004,
                        during which the Wild 2 encounter and post
                        encounter observations have occurred. This
                        longer coverage is indicated by the YYYY token
                        set to 2003_w2. The file for the year 2005 also
                        covers the beginning of January 2006, during
                        which the Earth return has occurred. This
                        longer coverage is indicated by the YYYY token
                        set to 2005_return.

                        These SPKs also contain Earth, Moon, Sun, Wild
                        2 and Annefrank ephemeris data. If more than
                        one file is present for any of the years, the
                        file with latest version (_vX) supersedes all
                        other files for that year.

      sdu_l_em          Stardust predicted "post" Earth return trajectory
                        SPK file created by SDU NAV Team, JPL.

      sdu_s_src         Stardust Sample Return Capsule (SRC) nominal
                        EDL trajectory SPK file created by SDU NAV
                        Team, JPL.

      sdu_w2_opnav      Stardust reconstructed trajectory SPK file
                        containing s/c trajectory for the Wild 2
                        encounter, determined as part of the Optical
                        Navigation (OPNAV) team geometry solution for
                        the encounter. This SPK also contains Earth, 
                        Moon, Sun, and Wild 2 ephemeris data.

      sdu_ant[_vXX]     Stardust antenna locations SP-Kernel file
                        providing locations of the spacecraft's center
                        of gravity and antennas with respect to the
                        spacecraft reference frame origin.


Kernel file details
===================

   The most detailed description of the data in each SPK file is provided 
   in metadata included inside the comment area of the file. This 
   information can be viewed using utility programs COMMNT and SPACIT 
   included into the NAIF Toolkit.
   

Contact information
===================

   Regarding Stardust project specific information provided in this
   data set and for general information about SPICE system:
   
      Charles H. Acton, Jr, 
      (818)-354-3869, 
      Chuck.Acton@jpl.nasa.gov, 
      
   or 
   
      Boris Semenov 
      (818)-354-8136 
      Boris.Semenov@jpl.nasa.gov
      
   or 
   
      Lee Elson
      (818)-354-4223 
      Lee.Elson@jpl.nasa.gov
      
   address:
   
      Navigation and Ancillary Information Facility (NAIF)
      Jet Propulsion Laboratory
      MS 301-125L
      4800 Oak Grove Drive
      Pasadena CA 91109 USA 

