From: Da Kuang Date: 25 Jun 1999 04:01:24 Subject: [IGEXMail-0394] Wk 0995 JPL IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 25-Jun-1999 04:01:24 Message No 0394 ****************************************************************************** Author: Da Kuang Subject: Wk 0995 JPL IGEX Analysis Report ***************************************************************************** JPL IGEX ANALYSIS REPORT FOR GPS-WEEK 0995 (DATE 99JAN31 TO 99FEB06) ***************************************************************************** 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: jpx0995n.sp3 -- 24 hours ephemerids files of the solution; jpx09957.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: 99feb01: REFCLOCK = 'IRKZ' 99feb02: REFCLOCK = 'IRKZ' 99feb03: REFCLOCK = 'IRKZ' 99feb04: REFCLOCK = 'IRKZ' 99feb05: REFCLOCK = 'IRKZ' 99feb06: REFCLOCK = 'IRKZ' 99jan31: 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 99jan31 99feb01 99feb02 99feb03 99feb04 99feb05 99feb06 ------------------------------------------------------------ 03 4 8 21 6 20 16 04 8 16 26 18 10 27 06 8 5 23 46 10 20 07 7 8 17 29 24 11 08 2 8 19 14 23 15 09 3 5 14 47 24 8 10 1840 6762 32489 40961 29602 10515 11 7 9 31 43 33 14 13 3 7 28 4 33 20 16 9 13 93 20 52 24 17 2 7 44 10 13 10 18 --- --- --- 22007 46 8 20 5 7 32 14 13 26 22 8 9 6 50 21 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 RRNNNNR 33 57 32 13 9 72 BORG RNNNRRR 16 69 35 67 9 42 BRUG NRRRRRR 14 29 8 28 7 16 CRAR FFGGGRG 1 2 7 2 1 7 CSIR RRRNRRR 902 1502 275 898 407 1474 DLRA RRRRNNN 11 61 11 61 11 8 EKAT NGGGGGN 6 6 15 3 1 17 GATR GGGGRRG 4 18 7 5 5 19 GRAB GGFFFFG 4 4 3 3 1 5 HERP RRRRRRR 14 15 24 15 13 24 IRKZ FFFFFFF 2 1 2 2 0 2 KHAB FFFFFFF 1 3 3 1 1 4 KR0G FFFFFFF 2 3 6 2 1 7 LDS1 GGGNNGG 6 3 5 3 2 8 LDS2 GGGGGGG 34 7 49 8 1 60 LINR RRNNNNN 28 0 5 14 8 23 LRBA FFFFFFF 2 1 3 1 0 4 MAGD RRRGGRR 2 2 2 1 1 3 MDOA RRRGGGG 4 8 4 5 3 8 MDVZ FFFFFFF 4 7 4 6 2 6 METZ FGGNNGG 6 5 9 6 2 9 NTZ3 GGGGGGG 4 2 6 2 0 7 OS0G GGGFFFF 2 4 2 4 1 3 PKST RRRGGRR 5 2 7 1 1 9 REUN FFFGGNN 13 2 4 9 0 10 STRR FFFFFFF 4 3 3 3 1 4 SUNM GGGFFFF 6 3 5 2 1 8 SVT3 RRRGGRR 15 19 21 23 5 22 THU2 FFFFGGG 4 4 4 3 4 5 TSKA FFFFFFF 2 1 1 1 0 3 WTZZ NNNNNNG 0 0 0 0 0 0 YAKT GGGGGRR 5 6 2 7 1 3 YARR FFFFFFG 3 4 2 1 0 5 ZIMZ GNNNGGG 2 6 7 6 2 7