PDS_VERSION_ID          = PDS3
RECORD_TYPE             = STREAM

OBJECT                  = TEXT
   INTERCHANGE_FORMAT   = ASCII
   PUBLICATION_DATE     = 2016-05-06
   NOTE                 = "Generic and MESSENGER specific SPICE Documents"
END_OBJECT              = TEXT

END


Generic and MESSENGER Specific SPICE Documentation
==================================================

   The set of documents and supporting files that describe the three segments
   of orbital reconstructions done by the MESSENGER Navigation Team and
   incorporated into the spacecraft ephemeris kernel
   data/spk/msgr_040803_150430_150430_od431sc_2.bsp.

      spkrecon/recon_orbit_phase_trajectory_part1.pdf
                         describes the first of three segments of orbital
                         reconstructions done by the MESSENGER Navigation Team
                         (original file ORECON1.bsp) and incorporated into the
                         spacecraft ephemeris kernel 
                         data/spk/msgr_040803_150430_150430_od431sc_2.bsp.
                         
      spkrecon/orecon1_sigmas_m.asc
                         a Matlab data file referenced in the above document
                         as "ORECON1_Sigmas.m" and provided as supporting
                         information, here renamed to conform to PDS
                         standards.
                         
      spkrecon/orecon1_apses_m.asc
                         a Matlab data file referenced in the above document
                         as "ORECON1_Apses.m" and provided as supporting
                         information, here renamed to conform to PDS
                         standards.

      spkrecon/recon_orbit_phase_trajectory_part2.pdf
                         describes the second of three segments of orbital
                         reconstructions done by the MESSENGER Navigation Team
                         (original files ORECON2-1.bsp and ORECON2-2.bsp) and
                         incorporated into the spacecraft ephemeris kernel 
                         data/spk/msgr_040803_150430_150430_od431sc_2.bsp.
                         
      spkrecon/orecon2_sigmas_m.asc
                         a Matlab data file referenced in the above document
                         as "ORECON2_Sigmas.m" and provided as supporting
                         information, here renamed to conform to PDS
                         standards.
                         
      spkrecon/orecon2_apses_m.asc
                         a Matlab data file referenced in the above document
                         as "ORECON2_Apses.m" and provided as supporting
                         information, here renamed to conform to PDS
                         standards.

      spkrecon/recon_orbit_phase_trajectory_part3.pdf
                         describes the third of three segments of orbital
                         reconstructions done by the MESSENGER Navigation Team
                         (original file ORECON3.bsp) and incorporated into the
                         spacecraft ephemeris kernel 
                         data/spk/msgr_040803_150430_150430_od431sc_2.bsp.
                         
      spkrecon/orecon3_sigmas_m.asc
                         a Matlab data file referenced in the above document
                         as "ORECON3_Sigmas.m" and provided as supporting
                         information, here renamed to conform to PDS
                         standards.
                         
      spkrecon/orecon3_apses_m.asc
                         a Matlab data file referenced in the above document
                         as "ORECON3_Apses.m" and provided as supporting
                         information, here renamed to conform to PDS
                         standards.
                         
                         
Contact Information
===================

   Regarding MESSENGER project specific information provided in this
   data set:

      Mike Reid
      (240)-228-4537
      Mike.Reid@jhuapl.edu

   address:

      The Johns Hopkins University Applied Physics Laboratory
      11100 Johns Hopkins Road
      Laurel, MD 20723

   For general information about SPICE system:

      Charles H. Acton, Jr,
      (818)-354-3869,
      Charles.Acton@jpl.nasa.gov,

   or

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

   address:

      Navigation and Ancillary Information Facility (NAIF)
      Jet Propulsion Laboratory
      MS 301-121
      4800 Oak Grove Drive
      Pasadena CA 91109 USA