From: Da Kuang Date: 21 Jun 1999 23:17:12 Subject: [IGEXMail-0386] Wk 0991 JPL IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 21-Jun-1999 23:17:12 Message No 0386 ****************************************************************************** Author: Da Kuang Subject: Wk 0991 JPL IGEX Analysis Report ***************************************************************************** JPL IGEX ANALYSIS REPORT FOR GPS-WEEK 0991 (DATE 99JAN03 TO 99JAN09) ***************************************************************************** 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: jpx0991n.sp3 -- 24 hours ephemerids files of the solution; jpx09917.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 to the solution of step 1, also solved are position of the stations that track GLONASS only, receiver clock bias between GPS and GLONASS tracking, and tropospheric delay. - 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: 99jan03: REFCLOCK = 'KHAB' 99jan04: REFCLOCK = 'IRKZ' 99jan05: REFCLOCK = 'IRKZ' 99jan06: REFCLOCK = 'IRKZ' 99jan07: REFCLOCK = 'IRKZ' 99jan08: REFCLOCK = 'IRKZ' 99jan09: REFCLOCK = 'KHAB' ------------------------------------------------------------------------ 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 99jan03 99jan04 99jan05 99jan06 99jan07 99jan08 99jan09 ------------------------------------------------------------ 03 13 14 12 24 16 21 04 28 11 16 37 22 24 06 12 17 8 31 13 19 09 12 10 9 13 7 20 10 --- --- 104 107 47 243 11 16 16 13 23 8 9 13 9 9 6 39 13 22 16 28 55 19 58 18 41 17 10 16 16 70 35 22 20 16 25 9 30 32 37 22 12 22 9 29 9 19 ------------------------------------------------------------------------ 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 RRRRRRR 96 111 91 63 11 161 BETR NNNNNNG 0 0 0 0 0 0 BIPD NNNNNRR 41 1 65 3 12 76 BORG RRRRRRR 45 99 69 101 20 78 BRUG NNRRRRR 65 12 91 10 7 112 CRAR RRRFFFF 8 10 32 11 2 33 CSIR RRRRRRR 246 181 523 263 527 144 GATR GGRRRRR 3 28 15 5 5 31 GODZ GGGGFFN 8 36 27 2 2 46 GRAB GGFFFFG 40 15 43 5 4 61 HERP RRRRRRR 76 6 99 6 7 125 IRKZ GFFFFFF 1 4 4 1 1 6 KHAB FFFFFFF 3 3 3 2 1 5 KR0G FFFFFFG 23 10 62 4 2 67 LDS1 NNNRRGG 528 16 722 12 7 895 LDS2 GGGGGGG 153 12 214 9 2 263 LRBA FFFFFFF 14 4 15 4 1 21 MDOA RRRRRRR 44 155 94 6 3 187 MDVZ FFFFFFF 8 3 10 3 2 13 METZ FFFFFGG 3 3 5 2 2 6 MTKA FFFFFFF 11 6 8 4 2 15 NPLC RRRRRRR 43 37 59 38 15 72 NTZ3 GGGGGGG 19 7 26 4 1 33 OS0G FFFFFFG 149 34 238 4 2 283 REUN FFFFFFF 15 19 9 4 0 26 REYZ FFFFFFF 11 4 24 2 0 27 STRR FFFFFFF 12 8 9 3 2 16 SUNM RRRNRRR 89 25 46 45 16 92 SVT3 NRRRRRR 100 52 195 11 2 225 THU2 RRFFFFF 3 10 37 5 3 38 TSKA FFFFFFF 12 10 9 2 2 18 USNX NRRNNNN 390 100 1070 403 839 664 VSLD NRRRRRR 58 10 82 7 4 101 YARR FFFFFFF 4 4 3 3 1 5 ZIMZ FFFFFFG 13 6 14 4 1 20