=============================================================================
SMART-1 PCK Files
=============================================================================

  Last Update: 12 MAY 2005

  This "aareadme.txt" file describes the contents of the KERNELS/PCK directory
  of the SMART-1 SPICE data server. It also provides the file naming
  conventions used for the SMART-1 PCK kernels, and it provides
  identification of the most current version of each kind of PCK file.

  PCK files in this directory are either binary or text files. Text files are
  created manually with the information from mainly the 2003 IAU Report. 
  Binary files are created from the information contained in the EOP files
  provided by IERS

  All binary PCK files (*.BPC) contained in this directory are unix binary
  files. These may be used as is (without format conversion) in a non-unix
  environment by using any recent version of the SPICE Toolkit (Version N0052
  or later). [Ref 2a]

  All text PCK files (*.TPC) contained in this directory are unix text files.
  These may be used in a non-compatible text environment by using the ASCII
  mode of FTP to port the files. [Ref 2a]

  Contact Jorge Diaz del Rio (jdiaz@rssd.esa.int) or Joe Zender 
  (Joe.Zender@esa.int) if you have any questions.

=============================================================================
References
=============================================================================

  1. PCK Reading. NAIF Document No. 254.05  17 Jan 2002 

  2. Selected SPICE Tutorials from the NAIF server:
ftp://naif.jpl.nasa.gov/pub/naif/toolkit_docs/Tutorials/office/
     individual_docs/
       
       a) Porting Kernels Tutorial     09_porting_kernels.ppt
       b) PCK Tutorial                 16_pck.ppt

  3. NAIF IDs Required Reading. NAIF Document No. 219.12  30 Jul 2003

=============================================================================
SMART-1 PCK Directory Structure
=============================================================================
  aareadme.txt       Text file describing the directory structure, the naming
                     conventions for the PCK, and the current version(s) of
                     each PCK type.

  former_versions    Subdirectory that contains obsolete versions of the PCK
                     files that have been updated in the Current PCK Kernel
                     Set.

=============================================================================
SMART-1 Binary PCK Naming Convention         EARTH_[sdat]_[edat]_[pdat].BPC
=============================================================================

      token          description
      ---------      -------------------------------------------------------
       [sdat]        Coverage start time of the file in YYMMDD format.

       [edat]        Coverage end time of the file in YYMMDD format.

       [pdat]        Start time for the predicted data in the file in YYMMDD
                     format.

=============================================================================
Current PCK Kernels Set
=============================================================================

  Name                             Comments
  ------------------------------  -------------------------------------------
  DE403-MASSES.TPC                PCK file containing the masses for the Sun
                                  planets, satellites and planetary
                                  barycenters. These masses are given
                                  as ratios to of Solar GM to barycenter GM.

  EARTH_[sdat]_[edat]_[pdat].BPC  PCK file containing the orientation of the
                                  Earth as a function of time for the interval
                                  [sdat] to [edat]. From [pdat] the
                                  information contained in the file
                                  corresponds to predicted data. The
                                  rotational effects included are 
                                  precession, nutation, rotation through true
                                  siderial time, polar motion and nutation 
                                  corrections.

  PCK00008.TCP                    PCK file containing the size, shape, radii
                                  and orientation constants for planets,
                                  satellites, Sun and some asteroids.