From: Da Kuang Date: 21 Jun 1999 23:26:22 Subject: [IGEXMail-0388] Wk 0993 JPL IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 21-Jun-1999 23:26:22 Message No 0388 ****************************************************************************** Author: Da Kuang Subject: Wk 0993 JPL IGEX Analysis Report ***************************************************************************** JPL IGEX ANALYSIS REPORT FOR GPS-WEEK 0993 (DATE 99JAN17 TO 99JAN23) ***************************************************************************** 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: jpx0993n.sp3 -- 24 hours ephemerids files of the solution; jpx09937.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: 99jan17: REFCLOCK = 'LRBA' 99jan18: REFCLOCK = 'KHAB' 99jan19: REFCLOCK = 'KHAB' 99jan20: REFCLOCK = 'IRKZ' 99jan21: REFCLOCK = 'IRKZ' 99jan22: REFCLOCK = 'KHAB' 99jan23: 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 99jan17 99jan18 99jan19 99jan20 99jan21 99jan22 99jan23 ------------------------------------------------------------ 03 27 9 11 13 13 8 04 56 7 8 14 7 6 06 45 18 19 24 5 7 09 37 8 19 26 7 5 10 288 287 36 72 163 60 11 6 10 20 21 16 8 13 30 7 15 12 9 6 16 40 35 23 105 31 15 17 55 6 14 12 11 6 20 7 17 16 42 18 5 22 24 14 7 12 12 13 ------------------------------------------------------------------------ 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 78 71 83 41 36 123 BETR GGGGNNN 1 11 6 5 0 11 BORG RRRRRRR 40 106 60 96 27 81 BRUG RRRRRRR 15 45 10 44 12 15 CRAR FFFFFFF 1 4 3 4 2 3 CSIR RNNNNRR 497 42 94 205 113 450 EKAT NNNNRRR 0 1 0 0 0 1 GATR RRRRRRR 5 8 7 4 4 10 GRAB FFFFFFF 2 1 1 1 1 3 HERP RRRRRRR 22 84 85 84 46 74 IRKZ FFFFFFF 1 1 2 1 1 2 KHAB GFFFFFF 0 1 1 1 1 1 KR0G FFFNFFF 1 1 0 0 1 0 LDS1 RRNNNNR 40 7 52 8 1 66 LDS2 GGGGGGG 10 2 15 2 1 18 LINR RRNRRRR 95 76 51 94 9 92 LRBA FFFFFFF 1 1 2 1 0 2 MAGD RRRRRRR 8 7 6 10 1 7 MDOA RRRRRRR 3 20 11 4 3 22 MDVZ FGGGGGF 3 1 5 2 1 5 METZ FFFNFFF 1 2 2 2 1 3 NTZ3 GGGGGGG 1 1 1 1 0 2 OS0G FFFNFFF 2 2 3 2 0 4 PKST GRRFFFF 25 6 33 3 1 42 REUN GFFFFFF 2 5 1 3 0 5 REYZ FFFFFFF 1 3 5 3 1 5 STRR NFFFFFF 1 3 0 3 0 1 SUNM FFFFFFR 6 5 1 7 0 3 SVT3 RRRRRRR 5 12 13 11 1 14 THU2 FFFFFFF 1 1 6 1 3 6 TSKA GGFFFFF 2 1 2 0 0 3 VSLD RRRNNNN 11 5 12 4 2 17 WTZG NRNNNNN 0 0 0 0 0 0 YAKT RRRRRRR 1 0 2 1 1 2 YARR FFFFFFF 2 5 1 3 1 4 ZIMZ FFFFNFF 2 3 0 3 1 2