PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2009-06-05
   NOTE                 = "MRO SP-Kernel Information"
END_OBJECT              = TEXT
                                                                     
END 

General Information About SPICE SP-Kernels
==========================================

   The purpose of the SP-kernel -- which stands for S(pacecraft) and
   P(lanet) Kernel -- is to allow ephemerides for any collection of
   solar system bodies, spacecraft or any other objects in 3D space to
   be combined under a common file format, and accessed by a common set
   of subroutines.
   
   The SPK files can be accessed and manipulated using the SPICE
   Toolkit APIs, calls to which can be integrated into user application
   programs. The information regarding how to obtain the SPICE system
   toolkit for a number of languages and computer platforms is located
   in the ``/software'' subdirectory of the main directory of this data
   set.
   
   To use SP-kernels, a Leapseconds (LSK) is required. Also, to use
   SP-Kernels containing positions given relative to the non-inertial
   and project-defined frames, a Frame Definitions (FK) and Planetary
   Constants (PCK) files are required.
   
   Refer to the ``spk.req'' document provided with the toolkit to get
   more information on how to access SP-kernel data.


MRO SP-kernels Provided in This Data Set
========================================

   The following MRO SP-kernels are provided in this data set (only
   name portion of the file name is shown; the extension of all file
   names is ``.bsp''):

   MRO Spacecraft Trajectory SPK files:

      mro_PHASE        SPK files covering the whole or a portion of a
                       particular phase of the mission, created by
                       merging regular reconstructed OD solution SPK
                       files from MRO NAV. The PHASE token in the file
                       name corresponds to the following coverage
                       boundaries:

                             PHASE  Begin date   End date
                             -----  -----------  -----------
                             cru    2005 AUG 12  2006 MAR 10
                             ab     2006 MAR 10  2006 SEP 12
                             psp1   2006 SEP 12  2007 JAN 01
                             psp2   2007 JAN 01  2007 APR 01
                             psp3   2007 APR 01  2007 JUL 01
                             psp4   2007 JUL 01  2007 OCT 01
                             psp5   2007 OCT 01  2008 JAN 01
                             psp6   2008 JAN 01  2008 APR 01
                             psp7   2008 APR 01  2008 JUL 01
                             psp8   2008 JUL 01  2008 OCT 01
                             psp9   2008 OCT 01  2009 JAN 01
                             psp10  2009 JAN 01  2009 APR 01
                             psp11  2009 APR 01  2009 JUL 01
                             psp12  2009 JUL 01  2009 OCT 01
                             psp13  2009 OCT 01  2010 JAN 01
                             psp14  2010 JAN 01  2010 APR 01
                             psp15  2010 APR 01  2010 JUL 01
                             psp16  2010 JUL 01  2010 OCT 01
                             psp17  2010 OCT 01  2011 JAN 01
                             psp18  2011 JAN 01  2011 APR 01
                             psp19  2011 APR 01  2011 JUL 01
                             psp20  2011 JUL 01  2011 OCT 01
                             psp21  2011 OCT 01  2012 JAN 01

                       The "psp*" files up to "psp9" cover parts of the 
                       Primary Science Phase of the mission; the "psp*"
                       starting with "psp10" cover parts of the Extended 
                       Science Phase of the mission.

      mro_PHASE_ssd_GM SPK files covering the whole or a portion of a
                       post-aerobraking phase of the mission (PSP,
                       Relay), created by merging the reconstructed
                       orbit solution SPK files produced by the Solar
                       System Dynamics (SSD) group, JPL. The PHASE
                       token in the file name corresponds to the
                       coverage specified above; the GM token
                       identifies the gravity model used in the orbit
                       solution (e.g. ``mro95a'').

   MRO Spacecraft Structures Fixed Offset SPK files:
   
      mro_struct_vVV   SPK files providing relative locations of
                       various MRO structures and science and
                       engineering instruments. The file with the
                       latest version number VV supersedes all previous
                       versions.
           
   Solar System Bodies Ephemeris data SPK file:
   
      de410            SPK file containing JPL's Planetary Ephemerides
                       DE410.

      mar063           SPK file containing JPL's Mars Satellite
                       Ephemerides (MAR) MAR063
                                    

   While the MRO NAV SPK files provide the most complete coverage, the
   most accurate trajectory solution is available in the latest SPK
   files produced by SSD. Therefore it is recommended that these two
   sets of files are loaded together with the latest SSD SPK files
   loaded last to take priority.


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 utility programs COMMNT and
   SPACIT included into the NAIF Toolkit.
   

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

   Regarding MRO project specific information provided in this data set
   and for general information about SPICE system:
   
      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 

