PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2009-10-01
   NOTE                 = "This file describes the files in the
                           extras/mk directory of this volume."
END_OBJECT              = TEXT

END

Meta-kernels for the 2001 Mars Odyssey 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 a given period. 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:

      m01_YYYY_vVV.tm

   when ``YYYY'' is the year covered by the kernels listed in the file
   and ``VV'' is the file version.

   Multiple versions of a meta-kernel for the same year may exist if
   new kernels were added to the archive in the later releases and the
   meta-kernel for that year 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 file for the same year is present, then
   the file with the latest version supersedes all earlier versions.
   The latest meta-kernels can be loaded together in any order to
   provide coverage for more than one year. (Note that on some
   environments loading too many kernels at once may slow down data
   access.)
 
   Although the meta-kernels were created in such way 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 terminator to
   terminator native to the user's system maybe require 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, PCK, SCLK, IKs, FK, CKs
         and SPKs were included

      -  both the reconstructed and nominal (nadir and ROTO) orientation
         spacecraft CKs were included with the reconstructed CKs taking
         precedence (listed last) and the nominal orientation CKs
         having lower priority (with nadir CKs having the lowest
         priority) and used when the reconstructed CKs do not provide
         coverage.

      -  both the M01 NAV and MGS95J IPNG spacecraft trajectory SPKs
         were included with the IPNG SPKs taking precedence (listed
         last) and M01 NAV SPK having lower priority and used when the
         IPNG SPKs do not provide coverage

      -  no EK files were included due to the low likelihood that EKs
         would be needed for a SPICE-based application using the M01
         SPICE data


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

   Regarding 2001 Mars Odyssey 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
