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Welcome to the ROSETTA SPICE ftp repository
===========================================

     This ftp site contains all the SPICE kernels generated for the Rosetta
     Mission.

     See more details in:

        https://www.cosmos.esa.int/web/spice/spice-for-rosetta

     To cite this SPICE Kernel Dataset in your publications please use:

        ESA SPICE Service, Rosetta Operational SPICE Kernel Dataset,
        https://doi.org/10.5270/esa-tyidsbu

     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:

       Bjoern Grieger          bjoern.grieger@esa.int
       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 Rosetta 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).

           ek:       Event kernels are not generated for Rosetta;
                     therefore, this directory is empty.

           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.

           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 each directory there is a subdirectory called
        former_versions, that stores all kernels that have been superseded by
        new kernels. You shouldn't use the kernels under these subdirectories.


ROSETTA SPICE Kernel Naming Convention
--------------------------------------------------------

        Please refer to the aareadme.txt in each of the subdirectories for
        information on the naming convention for the specific type of kernels.


Usage of the SPICE Kernels for ROSETTA
--------------------------------------------------------

        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.

        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 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 10th, 2019. (M. Costa)