SIRTF Odyssey SPK files.
===========================================================================
 
     This ``aareadme.txt'' file describes contents of the kernels/spk
     directory of the SIRTF SPICE data server. It was last modified on
     January 30, 2006. Contact Chuck Acton (818-354-3869,
     Chuck.Acton@jpl.nasa.gov) or Boris Semenov (818-354-8136,
     Boris.Semenov@jpl.nasa.gov) if you have any questions regarding this
     data.
 
 
Brief summary
--------------------------------------------------------
 
     This directory contains the SPICE SP-Kernel files for the SIRTF
     spacecraft. All files are in binary format and should be transferred
     using binary ftp to any workstation on which they are planned to be
     used. The following files are present in this directory. (Only file
     names are shown; the file name extensions of the binary SPK files are
     always ".bsp"):
 
     Regularly delivered SPK files:
 
           spk_YYMMDD_YYMMDD_YYMMDD[_short]   Regular OD solution SPK files
                                              produced by SIRTF NAV. These
                                              files are delivered once a
                                              week. Each of these files
                                              contains reconstructed
                                              trajectory for the period
                                              identified by the first ans
                                              second YYMMDD dates in the
                                              name and predicted trajectory
                                              for the period identified by
                                              the second and third YYMMDD
                                              dates in the name. The second
                                              YYMMDD date in the name also
                                              identifies the file creation
                                              date. Suffix ``_short'' is
                                              used in the files that don't
                                              provide coverage from the
                                              beginning of the mission.
 
     Other SPK files:
 
           de405s, spk_de405                  DE405 planetary ephemeris SPK
                                              files.
 
           encke97                            Comet Encke ephemeris SPK
                                              file.
 
           SIRTF_bright_obj_1                 SIRTF ``bright objects'' SPK
                                              file providing ephemeris data
                                              for outer planets and a
                                              number of asteroids.