PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM OBJECT = TEXT INTERCHANGE_FORMAT = ASCII PUBLICATION_DATE = 2007-02-20 NOTE = "MGS 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 or C functions that 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 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; the extension of all file names is ".bsp"): -- MGS Spacecraft Trajectory SPK files: mgs_[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 MGS NAV. Refer to the SPK coverage table provided below to find out coverage of a particular SPK file. mgs_[PHASE]_gsfc[_MODEL] SPK files covering the whole or a portion of a particular phase of the mission, created by merging quick-look OD solution SPK files based on the "[_MODEL]" gravity model, from MOLA POD Team, GSFC. Refer to the SPK coverage table provided below to find out coverage of a particular SPK file. mgs_[PHASE]_ipng[_MODEL] SPK files covering the whole or a portion of a particular phase of the mission, created by merging OD solution SPK files based on the "[_MODEL]" gravity model, from Inner Planet Navigation and Gravity group, JPL. Refer to the SPK coverage table provided below to find out coverage of a particular SPK file. mgs_50year_nominal SPK file containing 50-year, post mission nominal trajectory generated the MGS NAV team. -- 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 Mars Satellite Ephemerides (MAR) MAR033. mar033_7 SPK file containing JPL's Mars Satellite Ephemerides (MAR) MAR033 with longer coverage. mar063 SPK file containing JPL's Mars Satellite Ephemerides (MAR) MAR063. This file supersedes the MAR033 SPKs. All SPK files (except post-mission trajectory SPK(s)) provide actual (reconstructed) data. While the MGS NAV SPKs provide the most complete coverage, the most accurate trajectory solution is available in the latest SPKs produced by IPNG (version MGS95J). Therefore it is recommended that these two sets of files are loaded together with the IPNG MGS95J files loaded last to take priority. MGS SPK Coverage Table ====================== This table summarizes coverage of the MGS SPK files provided on this volume: [PHASE] Map. Start Stop token Cycles Date Date --------- ------ ---------- ---------- cru --- 1996-11-23 1997-08-23 ab1 --- 1997-09-13 1998-03-26 spo1 --- 1998-03-26 1998-05-28 spo2 --- 1998-05-28 1998-09-22 ab2 --- 1998-09-23 1999-03-08 map1 1-3 1999-03-09 1999-06-01 map2 4-6 1999-06-02 1999-08-24 map3 7-9 1999-08-25 1999-11-16 map4 10-12 1999-11-17 2000-02-08 map5 13-15 2000-02-09 2000-05-02 map6 16-18 2000-05-03 2000-07-25 map7 19-21 2000-07-26 2000-10-17 map8 22-25 2000-10-18 2001-01-31 ext1 25-27 2001-02-01 2001-04-03 ext2 28-30 2001-04-04 2001-06-26 ext3 31-33 2001-06-27 2001-09-18 ext4 34-36 2001-09-19 2001-12-11 ext5 37-39 2001-12-12 2002-03-05 ext6 40-42 2002-03-06 2002-05-28 ext7 43-45 2002-05-29 2002-08-20 ext8 46-48 2002-08-21 2002-11-12 ext9 49-51 2002-11-13 2003-02-04 ext10 52-54 2003-02-05 2003-04-29 ext11 55-57 2003-04-30 2003-07-22 ext12 58-60 2003-07-23 2003-10-14 ext13 61-63 2003-10-15 2004-01-06 ext14 64-66 2004-01-07 2004-03-30 ext15 67-69 2004-03-31 2004-06-22 ext16 70-72 2004-06-23 2004-09-14 ext17 73-75 2004-09-15 2004-12-07 ext18 76-78 2004-12-08 2005-03-01 ext19 79-81 2005-03-02 2005-05-25 ext20 82-84 2005-05-26 2005-08-16 ext21 85-87 2005-08-17 2005-11-08 ext22 88-90 2005-11-09 2006-01-31 ext23 91-93 2006-02-01 2006-04-25 ext24 94-96 2006-04-26 2006-07-18 ext25 97-99 2006-07-19 2006-10-10 ext26 100 2006-10-11 2006-11-03 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