PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2009-02-27 
   NOTE                 = "MRO C-Kernel Information"
END_OBJECT              = TEXT
                                                                     
END 


General Information About SPICE C-Kernels
=========================================

   In the SPICE system, pointing data for an instrument platform, or
   for a specific instrument, are stored C-kernels.  The pointing of
   a platform or an instrument is often expressed in terms of a
   transformation matrix from some standard inertial reference frame
   to a instrument-fixed frame. In the past, the instrument was often
   a camera, and the transformation was thus dubbed the ``C-matrix'';
   hence the choice of C as the name for the pointing kernel.
   
   The data contained in C-kernel files can be accessed and manipulated
   by a collection of FORTRAN 77 subroutines which are part of the
   SPICELIB library or C functions which are part of the CSPICE
   library. These subroutines/functions can be integrated into user
   application programs. The SPICE system toolkit for a number of
   computer platforms or information regarding how it can be obtained
   is located in the ``/software'' subdirectory of the main directory of
   this data set.
   
   To use C-kernels, a Spacecraft Clock Kernel (SCLK) is required.
   Also, for C-Kernels containing orientation of a project-defined
   frames, a Frame Definitions File is required.
   
   Refer to the ``ck.req'' document provided with the toolkit or
   available from the NAIF Node of PDS if SPICE toolkit is not included
   with this data set to get more information on how to access C-kernel
   data.


MRO C-kernels Contained in This Data Set
========================================

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

   MRO Spacecraft Orientation CK Files:

      mro_sc_PPP_YYMMDD_yymmdd[_V]   CK files providing actual
                                     telemetry-based orientation of the
                                     MRO spacecraft bus for the
                                     ``YYMMDD'' to ``yymmdd'' period of
                                     the ``PPP'' phase of the mission
                                     (where ``PPP'' is ``cru'' for
                                     Cruise, ``ab'' for Aerobraking,
                                     ``psp'' for Primary and Extended
                                     Science, ``rel'' for Relay). The
                                     version number, [_V], is omitted
                                     for version 1.

      mro_sc_PPP_YYMMDD_yymmddp[V]   CK files providing predicted
                                     orientation of the MRO spacecraft
                                     bus, modeled using the AtArPS tool
                                     for the ``YYMMDD'' to ``yymmdd''
                                     period of the ``PPP'' phase of the
                                     mission (where ``PPP'' is ``psp''
                                     for Primary and Extended Science,
                                     ``rel'' for Relay). ``p''
                                     following the end date indicates
                                     that the file contains predicted
                                     data. The version number, [V], is
                                     omitted for version 1.

   MRO Solar Arrays (SAs) Orientation CK Files:

      mro_sa_PPP_YYMMDD_yymmdd[_V]   CK files providing actual
                                     telemetry-based orientation of the
                                     SAs for the ``YYMMDD'' to
                                     ``yymmdd'' period of the ``PPP''
                                     phase of the mission (where
                                     ``PPP'' is ``cru'' for Cruise,
                                     ``ab'' for Aerobraking, ``psp''
                                     for Primary and Extended Science,
                                     ``rel'' for Relay). The version
                                     number, [_V], is omitted for
                                     version 1.

      mro_sa_PPP_YYMMDD_yymmddp[V]   CK files providing predicted
                                     orientation of the SAs, modeled
                                     using the AtArPS tool for the
                                     ``YYMMDD'' to ``yymmdd'' period of
                                     the ``PPP'' phase of the mission
                                     (where ``PPP'' is ``psp'' for
                                     Primary and Extended Science,
                                     ``rel'' for Relay). ``p''
                                     following the end date indicates
                                     that the file contains predicted
                                     data. The version number, [V], is
                                     omitted for version 1.
 
   MRO High Gain Antenna (HGA) Orientation CK Files:

      mro_hga_PPP_YYMMDD_yymmdd[_V]  CK files providing actual
                                     telemetry-based orientation of the
                                     HGA for the ``YYMMDD'' to
                                     ``yymmdd'' period of the ``PPP''
                                     phase of the mission (where
                                     ``PPP'' is ``cru'' for Cruise,
                                     ``ab'' for Aerobraking, ``psp''
                                     for Primary and Extended Science,
                                     ``rel'' for Relay). The version
                                     number, [_V], is omitted for
                                     version 1.

      mro_hga_PPP_YYMMDD_yymmddp[V]  CK files providing predicted
                                     orientation of the HGA, modeled
                                     using the AtArPS tool for the
                                     ``YYMMDD'' to ``yymmdd'' period of
                                     the ``PPP'' phase of the mission
                                     (where ``PPP'' is ``psp'' for
                                     Primary and Extended Science,
                                     ``rel'' for Relay). ``p''
                                     following the end date indicates
                                     that the file contains predicted
                                     data. The version number, [V], is
                                     omitted for version 1.
 
   MRO Compact Reconnaissance Imaging Spectrometer for Mars (CRISM)
   Orientation CK Files:

      mro_crm_PPP_YYMMDD_yymmdd[_V]  CK files providing actual
                                     telemetry-based orientation of the
                                     CRISM instrument for the
                                     ``YYMMDD'' to ``yymmdd'' period of
                                     the ``PPP'' phase of the mission
                                     (where ``PPP'' is ``cru'' for
                                     Cruise, ``psp'' for Primary
                                     and Extended Science, ``rel'' for
                                     Relay). The version number, [_V],
                                     is omitted for version 1.

   MRO Mars Climate Sounder (MCS) Orientation CK Files:

      mro_mcs_PPP_YYMMDD_yymmdd[_V]  CK files providing actual
                                     telemetry-based orientation of the
                                     MCS instrument for the ``YYMMDD''
                                     to ``yymmdd'' period of the
                                     ``PPP'' phase of the mission
                                     (where ``PPP'' is ``cru'' for
                                     Cruise, ``psp'' for Primary
                                     and Extended Science, ``rel'' for
                                     Relay). The version number, [_V],
                                     is omitted for version 1.

   If more than one CK of a particular kind is present for a given time
   interval, the file with the latest version, ``V'', supersedes all
   earlier versions.


Kernel File Details
===================

   The most detailed description of the data in a binary CK 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 

