=============================================================================
ROSETTA LSK Files
=============================================================================

  Last update:  08 AUG 2005  

  This "aareadme.txt" file describes the contents of the KERNELS/LSK
  directory. It also provides the file naming conventions used for the
  ROSETTA LSK kernels, and it provides identification of the most current
  version of LSK files.

  The LSK file is modified every time a new Leapsecond is announced by the
  International Earth Rotation Service (IERS).

  All LSK files (*.tls) 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 file.  [Ref 2b]

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


=============================================================================
References
=============================================================================
    1. Time Required Reading. NAIF Document No. 225.07  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) SCLK Tutorial               13_lsk_and_sclk.ppt
       b) Porting Kernels Tutorial    09_porting_kernels.ppt


  
=============================================================================
Rosetta LSK Directory Structure
=============================================================================
 aareadme.txt        Text file describing the directory structure, the naming
                     conventions for the LSKs, and the current version(s) of
                     each LSK type.

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

=============================================================================
Rosetta LSK Naming Covention                    NAIFxxxx.TLS
=============================================================================


          token           description
          ------------    ---------------------------------------------
          xxxx            Version number. This is the standard naming
                          convention for generic leapseconds kernel files.

=============================================================================
Current LSK Kernels Set
=============================================================================

 Name                 Comments
 -----------------    -----------------------------------------------------
 NAIF0008.TLS         File specifying the relationship between the Barycentric
                      Dynamical Time (TDB, also called Ephemeris Time, ET) and
                      Coordinated Universal Time (UTC) up to the last
                      modification in the Leapseconds: December 31, 2005.