MEX LSK Files
  =============

  This "aareadme.txt" file describes the contents of the kernels/lsk
  directory. It also provides the file naming conventions used for the MEX 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).

  The most detailed description of the data in an LSK file is provided in
  metadata included inside the description area of the file. This information
  can be viewed using any text editor program.

  At least a basic knowledge of the SPICE system is needed in order to use
  this kernels. The SPICE toolkit provides versions in Fortran (SPICELIB), C
  (CSPICE) and IDL (icy), and the user can choose any one that suits him/her.

  The SPICELIB routine FURNSH, CSPICE function furnsh_c, and icy and mice
  routine cspice_furnsh load a kernel file into the kernel pool as shown
  below.

      CALL FURNSH ( 'kernel_name' )
      furnsh_c    ( "kernel_name" );
      cspice_furnsh, 'kernel_name'
      cspice_furnsh( 'kernel_name' )


  In the case when two or more files contain data overlapping in time for a
  given object, for binary kernels, the file loaded last takes precedence.

  If two (or more) text kernels assign value(s) using the '=' operator to
  identical keywords, the data value(s) associated with the last loaded
  occurrence of the keyword are used -all earlier values have been replaced
  with the last loaded value(s).


  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.

  Contact

	ESA SPICE Team               spice@sciops.esa.int

  , or

    Alfredo Escalante Lopez      aescalante@sciops.esa.int

  if you have any questions.


References
==========

   1. Time Required Reading (NAIF Document).

   All the NAIF Documents are available at the NAIF web:

      http://naif.jpl.nasa.gov


Mars Express 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.

 NAIFvvvv.TLS        SPICE Kernel (LSK) that contains the
                     occurrences of leapseconds. vvvv is the
                     version number of the file.


-------------------

        This file was last modified on March 22, 2021 (R. Valles)


End of aareadme file.