M-Matisse SPK files
===========================================================================

   This ``aareadme.txt'' file describes the contents of the kernels/spk
   directory of the M-Matisse SPICE Kernel Dataset.

   It was last modified on March 27, 2024 by Alfredo Escalante Lopez, ESAC/ESA.

   DISCLAIMER: Not all SPKs provided in this directory are described.
   This is due to the fact that the information is not available to the
   ESA SPICE Service.


Brief Summary
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   This directory contains the SPICE SP-Kernel files for the M-Matisse
   mission, including mission analysis, nominal and operational spacecraft
   trajectory SPKs, generic planetary and satellite ephemeris SPKs.


File naming conventions
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   There is no agreed naming Scheme for M-Matisse spacecraft SPKs.


Current SPK Kernels Set
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   mmatisse_SC_DESCR_YYMMDD_YYMMDD_vNN.bsp

      SPICE SPK file that contains M-Matisse spacecraft trajectory covering
      from launch to arrival to Mars for the following scenario. Where:

       SC       - henri
                - marguerite

       DESC     a brief description of the scope of study of the
                scenario (optional);

                - Orbiter: either Henri or Marguerite
                - Launch year: 2036/2037 (nominal launch period) or
                               2038/2039 (backup launch period)
                - Transfer type: direct Earth-to-Mars transfer (short T2 or
                                 long T4 transfer), or with an intermediate
                                 Earth flyby, Earth-Earth-Mars (EEM) transfer
                - Launch day: from 1 to 21, LD1 = LPO, LD21 = LPC
                - Configuration: either father-daughter configuration (FDC)
                                 or dual-launch configuration (FDC)
                - Initial parking orbit (IPO): for a given post-MOI
                  inclination of 60 degrees, there are two hyperbola
                  solutions (IPO1 and IPO2).

       YYMMDD   coverage start and stop times in TDB (required);

       NN       SPK version number -- 2 digits (required).


   de432s.bsp

      SPICE SPK file containing JPL planetary ephemerides version DE432,
      created by NAIF, JPL.


   mar097_YYYYMMDD_YYYYMMDD.bsp

      SPICE SPK file containing JPL Martian satellite ephemerides version
      MAR097. Created by NAIF, JPL.


   estrack_vNN.bsp

      SPICE SPK file that defines the position for each of the ESA ESTRACK
      ground stations, as seen from the center of the Earth, in the
      topocentric frame defined in the corresponding ESTRACK FK.


Other directory contents
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   aareadme.txt         This file.

   coverage.txt         File that contains a summary of the coverage
                        of all the SPK files present in the directory.


Particulars
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   Trajectory data is consistent with planetary ephemeris DE-432 and with
   the leapseconds kernel naif0012.tls


Kernel File Details
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     The most detailed description of the data in a binary 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.


Contact Information
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     If you have any questions regarding this directory or its
     contents, please contact SPICE support at ESAC:

             Alfredo Escalante Lopez
             (+34) 91-8131-429
             spice@sciops.esa.int

     or NAIF at JPL:

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


References and required readings
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     1. ``SPK Required Reading'', NAIF Document


End of aareadme file.