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Welcome to the LISA Pathfinder FTP repository
=============================================

     This ftp site contains the SPICE kernels generated for the 
     LISA Pathfinder mission.

     See more details in:

       http://sci.esa.int/lisa-pathfinder/
       https://directory.eoportal.org/web/eoportal/satellite-missions/l/lisa-pathfinder

     For more information on SPICE for ESA Planetary Missions, please go to

       http://spice.esac.esa.int

     For information on SPICE, please go to

       https://naif.jpl.nasa.gov

     For any question or suggestion on this site, please contact:

       Marc Costa Sitja,       marc.costa@esa.int
       ESA SPICE Service,      esa_spice@sciops.esa.int


Content of this directory
--------------------------------------------------------

     Each subdirectory within this directory contains all the kernels of
     the same type that have been generated for the BepiColombo Mission.

        ck:       Kernels that contain orientation for the spacecraft and
                  some of its structures, (solar arrays, for instance).

        dsk:      Kernels that contain files contain detailed shape models
                  for extended objects (solar system bodies or spacecrafts
                  for instance).

        fk:       Kernels that define reference frames needed for the
                  Mission.

        ik:       Kernels for the instruments on board the spacecraft.

        lsk:      Leapseconds kernel.

        mk:       Meta-kernel files (a.k.a "furnsh" files) that provide
                  lists of kernels suitable for a given mission period.
                  This is the most important kernel to be considered by
                  users.

        pck:      Kernels that define planetary constants.

        sclk:     Spacecraft clock coefficients kernels.

        spk:      Orbit kernels, for the spacecraft and other solar system
                  bodies.


        Note that under the mk directory there is a subdirectory called
        former_versions that stores all mk that have been superseded by
        new kernels.

	      Please refer to the aareadme.txt in each of the subdirectories for
        information on the contents for the specific type of kernels and the
        corresponding naming conventions.


Usage of the SPICE Kernels for LISA Pathfinder
--------------------------------------------------------

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

     An unofficial Python version of the SPICE toolkit is available at:

        https://github.com/AndrewAnnex/SpiceyPy

     The SPICELIB routine FURNSH, CSPICE function furnsh_c, and icy 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_funsh( 'kernel_name' );

     In general is highly recommended to load the meta-kernel (``FURNSH
     kernel'')  with FURNSH instead of a list of kernels selected by the user
     for a given mission scenario. Nevertheless if the user needs to load a
     set of kernels not present in a meta-kernel it is important to remember
     that the last version of each kernel should always be considered and that
     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).


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

     This file was last modified on July 2nd, 2019 by Marc Costa Sitja.


End of aareadme file.