From: Da Kuang Date: 20 Aug 1999 19:15:30 Subject: [IGEXMail-0450] Wk 1003 JPL IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 20-Aug-1999 19:15:30 Message No 0450 ****************************************************************************** Author: Da Kuang Subject: Wk 1003 JPL IGEX Analysis Report ***************************************************************************** JPL IGEX ANALYSIS REPORT FOR GPS-WEEK 1003 (DATE 99MAR28 TO 99APR03) ***************************************************************************** Submitted by: Jet Propulsion Laboratory (JPL) California Institute of Technology 4800 Oak Grove Drive Pasadena, CA 91109, USA Phone: (818)-354-8332; Fax: (818)-393-4965 dxk@sideshow.jpl.nasa.gov Submitted files: jpx1003n.sp3 -- 24 hours ephemerids files of the solution; jpx10037.sum -- this file. ----------------------------------------------------------------------------- Solution Strategy ----------------------------------------------------------------------------- - Software: GIPSY/OASIS II. - Data: Undifferenced dual frequency pseudorange and carrier phase measurement. - Orbit arc length: For each day, 72 hours of data are processed to solve for a 30-hour long orbit arc solution. - Procedures: 1. Solve for station position, receiver clock and tropospheric delay from GPS data by fixing GPS orbit and transmitter clock; 2. Solve for GLONASS orbit and transmitter clock from GLONASS data by fixing the station position and tropospheric delay to the solution of step 1, also solved are position and tropospheric delay of the stations that track GLONASS only, receiver clock bias between GPS and GLONASS tracking. - Parameters: - GPS orbit and clock: fixed to the JPL IGS/FLINN solution; - GLONASS orbit: 6 initial states, global solar radiation scale, Y-bias, plus stochastic variation of radiation scale factor in body-fixed X and Z direction, and Y-bias; - GLONASS clock: white noise bias at each measurement time; - Station position: static over the orbit solution period; - Tropospheric zenith delay: random walk process; - Receiver clock: white noise bias at each measurement time; - Receiver clock bias between GPS and GLONASS tracking: random walk process. - Reference clock for GLONASS: Clocks of following stations, as determined in the Point Positioning solution from GPS data in procedure step 1, are chosen as the reference clocks: 99apr01: REFCLOCK = 'IRKZ' 99apr02: REFCLOCK = 'IRKZ' 99apr03: REFCLOCK = 'IRKZ' 99mar28: REFCLOCK = 'IRKZ' 99mar29: REFCLOCK = 'IRKZ' 99mar30: REFCLOCK = 'IRKZ' 99mar31: REFCLOCK = 'IRKZ' ------------------------------------------------------------------------ ORBIT OVERLAP ERROR (CM) ------------------------------------------------------------------------ Orbit error is computed based on 6 hours of overlapping orbit: 24 hours 3 hours ---|---------------------|--- ---|----------------------|--- 3 hours 24 hours 3D mean rms = sqrt((rms_x**2 + rms_y**2 + rms_z**2)/3) Sat 99mar28 99mar29 99mar30 99mar31 99apr01 99apr02 99apr03 ------------------------------------------------------------ 01 22 38 28 9 6 17 03 32 15 30 34 1904 --- 04 16 22 19 7 27 55 06 11 7 18 6 12 22 07 4 18 11 5 15 24 08 57 17 79 25 21 80 09 16 33 26 22 8 43 10 105 210 247 196 25 193 11 24 65 49 23 19 15 13 11 25 80 6 17 80 16 25 25 46 9 12 24 17 8 56 27 7 14 42 20 31 30 32 14 55 45 22 36 11 38 7 13 31 ------------------------------------------------------------------------ STATION POSITION REPEATABILITY (MM) ------------------------------------------------------------------------ In the solution of each day, a site may be a Fiducial site, a Regular site, or a GPS site. F -- Fiducial site, solved from GPS data and held fixed in GLO OD; R -- Regular site, solved from the GLO data with GLO OD; G -- GPS site, solved from GPS data, not involved in GLO OD; N -- Not used, either no data or data is not good; Site 0123456 X Y Z East North Vertical -------------------------------------------------------- 3SNA NNNRRRR 21 40 11 33 15 28 BIPD RRNNNRR 25 70 31 69 5 41 BORG RRRRRRR 12 3 15 6 3 19 BRUG RRNNNNR 49 9 62 5 2 79 DLFT GGGFFFF 7 2 7 2 1 10 DLRA RRRNNNR 31 81 28 84 11 34 GATR NNNFGGG 6 1 3 6 1 3 GODZ GGGGGGG 3 7 5 4 0 9 GRAB NNFFGGG 1 1 1 1 0 2 HERP RNNNRNN 4 9 12 9 11 6 IRKZ FFFFFFF 1 2 5 1 1 6 KR0G FFGGGGG 5 2 9 3 1 11 LDS1 GGNNNGG 34 10 39 10 5 52 LDS2 GGGGGGG 5 6 6 6 2 8 LINR RRRRRRR 89 72 42 101 5 68 MDOA FFFFFGG 3 8 4 3 0 9 MDVZ FFGGGGG 3 1 2 2 1 3 METZ FFFFFFR 2 1 2 1 0 3 MTKA GGGFFFF 3 3 0 4 1 1 NKLG GGGGNNN 7 3 1 5 1 6 NPLC NNNNRRR 34 18 35 18 8 48 NTZ3 GGGGGGG 4 1 4 1 1 6 OS0G FFFFFFF 3 1 5 1 0 6 REUN NNNNGGG 0 10 1 5 4 7 SL1X FFFFFFF 1 2 1 1 0 3 STRR FFFFGGG 7 3 3 5 1 7 SUNM FFFFFFG 19 11 12 3 0 25 TSKA GGGFFFF 2 2 1 1 2 1 VSLD RNNNNNR 9 2 11 2 0 15 WTZZ FFFFFFF 3 1 4 1 0 6 YARR FGGNNFF 1 1 1 2 1 0 ZIMJ GGFGGFG 1 3 1 3 1 1 ZIMZ GGFFFFF 2 3 3 3 0 3 --