GIOTTO SPK files
===========================================================================
 
   This ``aareadme.txt'' file describes contents of the kernels/spk
   directory of the GIOTTO SPICE data server. It was last modified on
   November 11, 2011. Contact Chuck Acton (818-354-3869,
   Chuck.Acton@jpl.nasa.gov), Samantha Krening (818-354-6933, 
   samantha.c.krening@jpl.nasa.gov), or Boris Semenov (818-354-8136,
   Boris.Semenov@jpl.nasa.gov) if you have any questions regarding the
   data files provided in this directory.
     
     
Giotto SP-kernels Provided in This Directory 
=================================================

   The following Giotto SPK files are present in this directory. (Only the
   leading portions of the file names are shown; the file name extensions
   of the binary SPK files are always ".bsp"):

      giotto_19860305_19860317_v0   SPK file providing Giotto spacecraft
                                    trajectory as well as ephemerides of
                                    Halley's comet and Earth for the
                                    duration of Giotto's closest approach
                                    to Halley.

Giotto SPK File Naming Scheme
==================================

   The Giotto SPKs provided in this directory are named according to
   the following scheme:
   
      sc_start_stop_vX.bsp
      
   where:
   
      sc       is the name of the spacecraft: "giotto".
      
      start    is the time the coverage of the file starts (YYYYMMDD).
      
      stop     is the time the coverage of the file stops  (YYYYMMDD).
      
      vX       is the file version number.
      
      
Kernel File Details
===================

   The most detailed description of the data in each SPK file is
   provided in metadata included inside the comment area of the file.
   This information can be viewed using the utility programs COMMNT and
   SPACIT included in the NAIF Toolkit.