From: Da Kuang Date: 20 Aug 1999 19:11:25 Subject: [IGEXMail-0449] Wk 1002 JPL IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 20-Aug-1999 19:11:25 Message No 0449 ****************************************************************************** Author: Da Kuang Subject: Wk 1002 JPL IGEX Analysis Report ***************************************************************************** JPL IGEX ANALYSIS REPORT FOR GPS-WEEK 1002 (DATE 99MAR21 TO 99MAR27) ***************************************************************************** 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: jpx1002n.sp3 -- 24 hours ephemerids files of the solution; jpx10027.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: 99mar21: REFCLOCK = 'IRKZ' 99mar22: REFCLOCK = 'OS0G' 99mar23: REFCLOCK = 'OS0G' 99mar24: REFCLOCK = 'OS0G' 99mar25: REFCLOCK = 'IRKZ' 99mar26: REFCLOCK = 'IRKZ' 99mar27: 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 99mar21 99mar22 99mar23 99mar24 99mar25 99mar26 99mar27 ------------------------------------------------------------ 01 21 10 22 7 17 14 03 26 9 23 20 15 10 04 22 7 20 15 17 18 06 17 4 17 19 20 25 07 21 10 10 13 23 16 08 74 13 18 16 26 21 09 17 7 19 21 19 50 10 109 416 281 525 298 53 11 23 15 17 7 11 25 13 14 6 84 28 32 26 16 13 15 15 15 17 55 17 13 8 27 31 21 28 20 11 9 18 28 35 15 22 15 16 23 18 36 22 ------------------------------------------------------------------------ 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 -------------------------------------------------------- BIPD NNRRRRR 10 8 8 7 3 13 BORG RRRRRRR 14 10 20 13 4 23 BRUG RNNNRRR 26 9 22 8 12 32 CSIR NNNRNNN 0 0 0 0 0 0 DLFT FFFFFFF 4 2 5 2 0 7 DLRA RRRRRRR 32 20 36 14 11 49 GATR GNNNNNN 0 0 0 0 0 0 GODZ FFFFFFF 3 5 3 4 0 5 GRAB GGFGGNN 2 1 2 1 0 3 HERP NNNNNRR 22 7 29 7 1 37 IRKZ FGGGFFF 1 2 5 1 1 5 KHAB GNNNNNN 0 0 0 0 0 0 KR0G FFFGGGG 2 1 3 2 1 4 LDS1 RRRRGGG 73 4 100 6 5 124 LDS2 GGGGGGG 10 2 12 2 1 16 LINR RRRRRRR 713 249 141 149 308 687 LRBA GGGNNNN 3 5 2 5 0 4 MDOA FFFFFFF 3 8 4 2 0 10 MDVZ FFGGGFF 5 2 2 5 2 3 METZ GGFFFFF 3 2 3 2 1 4 MTKA FFFFFFF 1 4 1 3 2 1 NKLG FFFFGGG 10 4 0 5 0 9 NPLC RRRRNNN 14 19 19 19 9 22 NTZ3 GGGGGGG 2 1 4 1 0 5 OS0G FFFFFFF 3 1 4 0 0 5 SL1X FFFFFFF 2 2 1 2 0 2 STRR NFFFGGG 9 8 4 6 3 12 SUNM FFFFGGG 19 9 11 3 1 24 TSKA FFFGGGG 3 4 3 3 4 4 VSLD NRRRRRR 31 16 8 18 19 24 WTZZ FFFFFFF 2 2 4 2 0 5 YARR GGGGGGG 3 6 3 3 1 7 ZIMJ FFFFGGN 2 2 1 2 2 2 ZIMZ GFFFGGN 2 1 1 1 2 1 --