PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2007-04-12
   NOTE                 = "This file describes the files in the
                           extras/mk directory of this volume."
END_OBJECT              = TEXT

END

Meta-kernels for the Deep Space 1 mission
=========================================

   This directory contains the meta-kernel files (a.k.a "furnsh" files)
   that provide lists of the archived kernels included in this data set
   suitable for loading into a SPICE-based application via the high
   level SPICE data loader routine FURNSH. Using these meta-kernels
   makes it easy to load with one call a comprehensive SPICE data
   collection for the whole mission. Like the text kernels archived in
   this data set, these meta-kernels are UNIX text files that have
   lines terminated with a line feed character, LF (ASCII 10).

   The names of the meta-kernels provided in this directory follow this
   pattern:

      ds1_vVV.tm

   where ``VV'' is the file version.

   Multiple versions of a meta-kernel may exist if new kernels were
   added to the archive in a later release and the meta-kernel had
   to be updated to incorporate them. The reasons for adding new
   kernels include (but are not limited to) adding new kinds of
   kernels, adding new versions of existing kernels containing more
   complete or more accurate data, and adding new versions of existing
   kernels superseding the existing kernels that had errors. If more
   than one meta-kernel file is present, then the file with the latest 
   version number supersedes all earlier versions.
 
   Although the meta-kernels were created such that on a UNIX
   workstation they can be loaded into a SPICE-based application
   directly from the root directory of the data set -- because the
   PATH_VALUES keyword is set to './data' and '/' is used as the path
   delimiter -- it is recommended that users make local copies of these
   files and update the PATH_VALUES keyword in each of them to point to
   the actual location of the data set's 'data' directory on their
   system. Additional changes including replacing '/' and '\' in all
   path specifications and converting UNIX line terminators to
   terminators native to the user's system may be required to use these
   meta-kernels on non-UNIX workstation.
 
   The following guidelines were followed to pick and set priority --
   determined by the order in which the kernel files are listed, with
   the latest one taking precedence -- for the kernel files included in
   these meta-kernels:

      -  the latest archived versions of LSK, PCKs, IKs, SCLK, CKs, and
         FK were included
 
      -  the set of the SPKs was picked according to the
         recommendations made in the ``data/spk/spkinfo.txt'' file
 
      -  no EK files were included due to the low likelihood that EKs
         would be needed for a SPICE-based application using the DS1
         SPICE data


Contact Information
===================

   Regarding Deep Space 1 project specific information provided in this
   data set and for general information about SPICE system, contact:

      Boris Semenov
      (818)-354-8136
      Boris.Semenov@jpl.nasa.gov

   address:

      Navigation and Ancillary Information Facility (NAIF)
      Jet Propulsion Laboratory
      MS 301-125L
      4800 Oak Grove Drive
      Pasadena CA 91109 USA
