From: Da Kuang Date: 20 Aug 1999 19:17:32 Subject: [IGEXMail-0451] Wk 1004 JPL IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 20-Aug-1999 19:17:32 Message No 0451 ****************************************************************************** Author: Da Kuang Subject: Wk 1004 JPL IGEX Analysis Report ***************************************************************************** JPL IGEX ANALYSIS REPORT FOR GPS-WEEK 1004 (DATE 99APR04 TO 99APR10) ***************************************************************************** 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: jpx1004n.sp3 -- 24 hours ephemerids files of the solution; jpx10047.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: 99apr04: REFCLOCK = 'IRKZ' 99apr05: REFCLOCK = 'IRKZ' 99apr06: REFCLOCK = 'IRKZ' 99apr07: REFCLOCK = 'IRKZ' 99apr08: REFCLOCK = 'IRKZ' 99apr09: REFCLOCK = 'IRKZ' 99apr10: 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 99apr04 99apr05 99apr06 99apr07 99apr08 99apr09 99apr10 ------------------------------------------------------------ 01 4 10 7 14 8 8 03 --- --- --- 138 91 20 04 11 8 6 7 16 11 06 11 9 15 4 4 33 07 3 6 7 5 4 16 08 14 7 43 30 12 65 09 17 6 5 12 5 10 10 380 169 172 264 1856 2559 11 5 5 11 12 3 11 13 5 6 3 10 9 9 16 10 11 10 21 16 17 17 23 16 10 7 8 8 20 4 7 21 7 7 34 22 8 4 21 7 7 7 ------------------------------------------------------------------------ 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 RRRRRNN 14 34 26 7 3 45 BIPD RRNNNRR 20 11 30 10 3 36 BORG RRRRRRR 13 2 16 5 2 20 BRUG RRRRNNN 71 34 48 33 28 82 CSIR NRRRRRN 190 384 197 323 194 283 DLFT FFFFFGG 1 1 1 1 0 2 DLRA RRRRRRR 8 34 8 35 2 10 GATR GNNNNNN 0 0 0 0 0 0 GODZ FFFFGGG 5 5 5 4 1 8 GRAB FFGGGFG 1 1 1 1 1 1 HERP NNNRRRR 3 4 2 4 3 2 IRKZ FFFFFFF 2 1 1 1 0 2 KR0G GGGGGGG 1 0 3 1 0 3 LDS1 GRRRRRR 60 4 84 3 0 104 LDS2 GGGGGGG 21 11 31 11 3 37 LINR RRNNNRN 34 26 8 11 27 32 MDOA GNNNNNN 0 0 0 0 0 0 MDVZ FFFFFFF 2 2 2 1 1 3 METZ RRFFFFF 1 1 5 1 1 5 MTKA FFFFFFF 1 3 2 2 0 3 NKLG NNNFFFG 6 3 2 4 2 5 NPLC RRRNNNN 18 3 26 3 2 32 NTZ3 GGGGGGG 1 0 1 0 0 1 OS0G FFFFFFF 1 1 2 1 0 3 REUN GFGGNNN 2 2 1 2 0 3 SL1X GGGFFFF 3 6 4 2 1 8 STRR FFFFFFF 5 3 4 0 1 7 SUNM GNNNNNN 0 0 0 0 0 0 TSKA FFFFGGG 1 1 1 1 1 2 VSLD NNNRRNN 7 1 3 0 3 7 WTZZ FFFFFFF 1 1 2 1 0 3 YARR FFFGGNN 5 5 2 7 0 3 ZIMJ GNNNNNN 0 0 0 0 0 0 ZIMZ FFFFFFF 1 0 2 1 0 2 --