PDS_VERSION_ID = PDS3 RECORD_TYPE = STREAM INSTRUMENT_NAME = "RADIO SCIENCE SUBSYSTEM" TARGET_NAME = MARS DATA_SET_ID = "MGS-M-RSS-1-MAP-V1.0" PRODUCT_TYPE = IPN MISSION_NAME = "MARS GLOBAL SURVEYOR" INSTRUMENT_HOST_NAME = "MARS GLOBAL SURVEYOR" ORIGINAL_PRODUCT_ID = "mgs_map6_ipng_mgs75c.bsp" PRODUCT_ID = "0123209A.IPN" FILE_NAME = "0123209A.IPN" PRODUCT_VERSION_TYPE = "IPN-V1.0" MISSION_PHASE_TYPE = "MAPPING" PRODUCT_CREATION_TIME = 2000-12-20T19:40:52 START_TIME = 2000-05-02T14:00:00 STOP_TIME = 2000-07-27T16:00:00 PRODUCER_ID = "MGS RST" NOTE = "MGS trajectory solution mgs_map6_ipng_mgs75c.bsp from the JPL Inner Planet Navigation Group, merged with Mars satellite ephemeris mar033-5.bsp and planetary ephemeris de405.bsp by the MGS RST at Stanford. MGS Mapping SPK file (6), JPL IPNG Solution MGS75C ------------------------------------------------------------------------- Created by Boris Semenov, NAIF/JPL, September 15, 2000. Objects in the Ephemeris -------------------------------------------------------- This file contains ephemeris data for the Mars Global Surveyor (MGS) spacecraft. NAIF ID code for MGS is -94. Approximate Time Coverage -------------------------------------------------------- This file covers the most part of the 16th, 17th and 18th 28-day mapping cycles of the Mapping phase of the mission: COVERAGE BEGIN TIME (TDB) COVERAGE END TIME (TDB) ------------------------- ------------------------ 2000 MAY 02 14:00:00.000 2000 JUN 23 16:00:00.000 2000 JUL 13 14:00:00.000 2000 JUL 27 16:00:00.000 No coverage is available between June 23 and July 13 due to absence of tracking data during solar conjunction. Status -------------------------------------------------------- This SPK file contains MGS orbit reconstruction provided by Dah-Ning Yuan of the Inner Planet Navigation and Gravity Group (IPNG), JPL. This SPK file is NOT recommended by the project science office to be used for the archiving of Mapping data sets but it can be used at one's own risk. Pedigree -------------------------------------------------------- The original SPK files used to make this file were created from a set of NIO files provided to the NAIF team by Dah-Ning Yuan, IPNG/JPL. The following are the models used for the orbit determination process: KINEMATIC MODELS: 1. Earth Precession and Nutation. 2. Earth rotation and Polar motion. 3. DSN station coordinates and velocity (Folkner). 4. Solid Earth Tide on station coordinates. 5. Ocean Loading Tide on station coordinates. 6. Pole Tide on station coordinates. DYNAMIC MODELS: 1. Planetary (DE405K) and satellite ephemeris (MAR033.2). 2. General relativity. 3. MGS75C mars gravity field (Sjogren et. al.). 4. Solid tides. 5. Mars-GRAM (Mars global reference atmosphere model). 6. Solar radiation. 7. Mars radiation (Lemoine). 8. Small forces. ESTIMATED PARAMETERS: 1. Initial state: per orbit arc. 2. Solar radiation scale factor: per orbit arc. 3. Drag coefficient: per orbit revolution. 4. Small forces: at Angular Momentum Dump (AMD) time. 5. Range bias: per pass. 6. F3 bias: per pass. 7. F2 bias: one bias. 8. F1 bias: per pass. REFERENCES: 1. Folkner, William, JPL IOM 335.1-95-027, 16 October 1995. 2. Lemoine, Frank G., Mars: the dynamics of orbiting satellites and gravity model development, 1992, Ph.D thesis. 3. Sjogren L. William, Dah-Ning Yuan, Alexander S. Konopliv, Mars Gravity Field Modelling with MGS Mapping Data, 1999 Fall meeting, American Geophysical Union. The naming convention for the original SPK files was: p_XXXXX_YYYY_MM_DD.bsp where the designation refers to: XXXXX gravity model name; YYYY_MM_DD file coverage start date; Data from the following original SPK files were included into this file: FILE NAME ----------------------- p_mgs75c_2000_05_02.bsp p_mgs75c_2000_05_04.bsp p_mgs75c_2000_05_06.bsp p_mgs75c_2000_05_08.bsp p_mgs75c_2000_05_10.bsp p_mgs75c_2000_05_12.bsp p_mgs75c_2000_05_14.bsp p_mgs75c_2000_05_16.bsp p_mgs75c_2000_05_18.bsp p_mgs75c_2000_05_20.bsp p_mgs75c_2000_05_22.bsp p_mgs75c_2000_05_24.bsp p_mgs75c_2000_05_26.bsp p_mgs75c_2000_05_28.bsp p_mgs75c_2000_05_30.bsp p_mgs75c_2000_06_01.bsp p_mgs75c_2000_06_03.bsp p_mgs75c_2000_06_05.bsp p_mgs75c_2000_06_07.bsp p_mgs75c_2000_06_09.bsp p_mgs75c_2000_06_11.bsp p_mgs75c_2000_06_13.bsp p_mgs75c_2000_06_15.bsp p_mgs75c_2000_06_17.bsp p_mgs75c_2000_06_19.bsp p_mgs75c_2000_06_21.bsp p_mgs75c_2000_07_13.bsp p_mgs75c_2000_07_15.bsp p_mgs75c_2000_07_17.bsp p_mgs75c_2000_07_19.bsp p_mgs75c_2000_07_21.bsp p_mgs75c_2000_07_23.bsp p_mgs75c_2000_07_25.bsp Contacts -------------------------------------------------------- If you have any questions regarding this data contact Boris V. Semenov, NAIF/JPL, (818)-354-8136, bsemenov@spice.jpl.nasa.gov or: Dah-Ning Yuan, dny@krait.jpl.nasa.gov" ^DESCRIPTION = "IPN_SPK.TXT" END