PDS_VERSION_ID = PDS3
RECORD_TYPE = STREAM
OBJECT = TEXT
INTERCHANGE_FORMAT = ASCII
PUBLICATION_DATE = 2000-02-07
NOTE = "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 format is supported by a collection of subroutines that
are part of the SPICELIB library, the major component of the NAIF
Toolkit. These subroutines 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 dataset.
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 (FRAMES) and
Planetary Constants (PcK) files are required.
Refer to the SPK.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 SP-kernel data.
MGS SP-kernels provided on this volume
======================================
The following MGS SP-kernels are provided on this volume (only name
portion of the file name is shown on the right; the extension of all
file names is ".bsp"):
-- MGS Spacecraft Trajectory SPK files:
MGS_CRUS SPK file covering the whole Cruise
phase of the mission, created by
merging regular OD solution SPK files
from MGS NAV.
MGS_AB1 SPK file covering the whole
Aerobraking-1 phase of the mission,
created by merging regular OD solution
SPK files from MGS NAV.
MGS_AB1_POSTMOI_GSFC SPK file covering the post-MOI portion
of the AB1 phase of the mission,
created by merging quick-look OD
solution SPK files from MOLA POD Team,
GSFC.
MGS_AB1_HIATUS_GSFC SPK file covering the Hiatus portion of
the AB1 phase of the mission, created
by merging quick-look OD solution SPK
files from MOLA POD Team, GSFC.
MGS_SPO1 SPK file covering the whole Science
Phasing Orbit 1 (SPO-1) phase of the
mission, created by merging regular OD
solution SPK files from MGS NAV.
MGS_SPO1_GSFC SPK file covering most part of the
SPO-1 phase of the mission, created by
merging quick-look OD solution SPK
files from MOLA POD Team, GSFC.
MGS_SPO1_GSFC_MGM0883 SPK file covering most part of the
SPO-1 phase of the mission, created by
merging quick-look OD solution SPK
files generated by MOLA POD Team, GSFC
using updated gravity model mgm0883.
MGS_SPO1_GSFC_MGM0890 SPK file covering most part of the
SPO-1 phase of the mission, created by
merging quick-look OD solution SPK
files generated by MOLA POD Team, GSFC
using updated gravity model mgm0890.
MGS_SPO1_IPNG SPK file covering most part of the
SPO-1 phase of the mission, created by
merging OD solution SPK files from
Inner Planet Navigation and Gravity
group, JPL.
MGS_SPO2 SPK file covering the whole Science
Phasing Orbit 2 (SPO-2) phase of the
mission, created by merging regular OD
solution SPK files from MGS NAV.
MGS_SPO2_GSFC SPK file covering the whole Science
Phasing Orbit 2 (SPO-2) phase of the
mission, created by merging quick-look
OD solution SPK files from MOLA POD
Team, GSFC.
MGS_SPO2_GSFC_MGM0883 SPK file covering whole SPO-2 phase of
the mission, created by merging
quick-look OD solution SPK files
generated by MOLA POD Team, GSFC using
updated gravity model mgm0883.
MGS_SPO2_GSFC_MGM0890 SPK file covering whole SPO-2 phase of
the mission, created by merging
quick-look OD solution SPK files
generated by MOLA POD Team, GSFC using
updated gravity model mgm0890.
MGS_SPO2_IPNG SPK file covering the whole Science
Phasing Orbit 2 (SPO-2) phase of the
mission, created by merging OD solution
SPK files from Inner Planet Navigation
and Gravity group, JPL.
MGS_AB2 SPK file covering the whole
Aerobraking-2 phase of the mission,
created by merging regular OD solution
SPK files from MGS NAV.
-- MGS Spacecraft Structures Fixed Offset SPK files:
MGSSTRUCT_HGA SPK file containing location of the
HGA structures with respect to each other.
MGSSTRUCT_MAGER SPK file containing location of the
MGA Solar Array structures and MAG Sensors
with respect to each other.
-- Solar System Bodies Ephemeris data SPK file:
MAR033 SPK file containing JPL's Development
Ephemerides (DE) 405 and Mars Satellite
Ephemerides (MAR) MAR033.7.
All this data is actual (reconstructed).
SPK Files Used for Archiving
============================
The following SPK files were recommended by the MGS project Science
Office to be used as "official" files to support archiving of the
science data by the project science instrument teams:
MGS_CRUS.BSP
MGS_AB1.BSP
MGS_SPO1.BSP
MGS_SPO2_GSFC.BSP
MGS_AB2.BSP
Note that these files were chosen because they supposedly contained the
best orbital solution available at the time of archiving (summer-fall
1998.)
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 MGS project specific information provided in this
data set and for general information about SPICE system:
Charles H. Acton, Jr,
(818)-354-3869,
Chuck.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 301-125L
4800 Oak Grove Drive
Pasadena CA 91109 USA