From: Heinz Habrich Date: 23 Dec 1998 15:45:15 Subject: [IGEXMail-0129] Wk 0981 BKG IGEX Analysis Report ****************************************************************************** IGEX Electronic Mail 23-Dec-1998 15:45:15 Message No 0129 ****************************************************************************** Author: Heinz Habrich Subject: Wk 0981 BKG IGEX Analysis Report ****************************************************************************** BKG IGEX ANALYSIS REPORT GPS WEEK 0981 (DAYS 298 - 304, 1998) ****************************************************************************** Submitted by: Bundesamt fuer Kartographie und Geodaesie (BKG) Richard-Strauss-Allee 11, D-60598 Frankfurt Main, Germany Phone : +49-69-63331 Fax : +49-69-6333425 E-Mail: habrich@ifag.de Product access: anonymous ftp to igs.ifag.de (141.74.240.26) subdirectory IGEX/products/wwww ------------------------------------------------------------------------------ PROCESSING SCHEME: ------------------------------------------------------------------------------ SOFTWARE: Bernese GPS Software ORBIT COMPUTATION: Double difference phase observations of GLONASS and GPS satellites are processed in ionosphere free linear combination. IGS orbits and Earth rotation parameters are fixed. Six initial conditions and nine radiation preassure parameters per satellite are determined for GLONASS satellites. The middle day of a 3-day-arc is used for the daily orbit results. The daily orbit files include GPS satellite clock values from IGS estimates and broadcasted values for GLONASS satellite clocks. The station Zimmerwald in Switzerland (ZIMZ) is constrained to the ITRF96 coordinates. GLONASS/GPS TIME OFFSET: Code observations of combined GLONASS/GPS receivers are used to determine the GLONASS/GPS time offset. This offset includes the modulo 1 sec system time scale difference of GLONASS and GPS and an additional offset between the receiver's 'GPS clock' and 'GLONASS clock'. The additional offset is receiver dependent. TRANSFORMATION PARAMETERS BETWEEN ITRF AND PZ90: The transformation parameters are derived from GLONASS precise orbits (given in ITRF) and GLONASS broadcast orbits (given in PZ90). ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ ORBIT REPEATABILITY, DAILY SOLUTIONS COMPARED TO 7-DAY-ARC (CM): ------------------------------------------------------------------------------ GLONASS Satellites: 103 104 106 109 110 111 112 113 115 116 117 118 120 122 ------------------------------------------------------------------------------ 298 13 22 25 14 67 16 17 17 19 25 48 15 11 11 299 22 16 23 11 43 8 37 13 17 52 27 10 7 6 300 28 32 16 23 41 12 34 16 10 35 39 21 6 16 301 26 32 18 17 59 9 49 24 13 36 37 14 11 12 302 14 29 29 14 50 29 12 14 9 28 29 18 12 7 303 7 10 45 9 66 26 60 17 8 17 43 8 20 9 304 11 16 26 8 86 19 46 12 22 48 14 11 11 8 ------------------------------------------------------------------------------ ALL 19 24 27 15 61 19 40 17 15 36 35 14 12 10 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GLONASS/GPS TIME OFFSET: ------------------------------------------------------------------------------ OFFSET (NS) RMS ERROR (NS) DAY : 298 299 300 301 302 303 304 STATION ------------------------------------------------------------------------------ BORG 1042.719 1051.010 1038.297 1023.174 1052.336 1042.440 1041.659 .829 .868 .865 .987 .851 .887 .843 BRUG 1029.193 1056.392 1043.673 1046.730 1.021 .873 .912 .869 GATR 64.908 45.306 -13.022 1.529 1.498 1.976 GODZ 87.377 61.966 88.039 69.351 98.134 88.512 .883 4.756 .878 1.017 .847 .860 IRKZ 89.647 93.040 102.727 96.938 100.319 101.532 93.096 .840 .804 .866 .841 .811 .846 .843 KHAB 83.169 102.832 92.714 92.435 88.097 .855 1.113 .847 .870 .864 KR0G 30.356 34.317 30.092 16.603 38.830 29.864 29.612 .766 .793 .797 .901 .776 .808 .764 LDS1 -901.801 -889.601 -907.028 -920.198 -880.009 -894.690 -906.513 1.098 1.195 1.297 1.463 1.287 1.156 1.238 LRBA 88.886 90.962 .864 .842 METZ 80.116 85.819 80.195 65.383 89.621 79.731 77.117 .776 .804 .851 1.014 .868 1.041 1.000 MTKA 105.863 .895 OS0G 85.723 91.465 82.937 69.350 93.691 82.833 78.415 .782 .829 .810 .950 .812 .831 .913 REYZ 124.524 131.611 124.620 111.381 134.386 123.735 124.365 .797 .821 .802 .929 .811 .814 .799 SL1X 82.705 56.515 86.981 80.090 76.985 2.384 1.008 .833 .847 .836 WTZG -723.257 -693.696 3.586 1.487 VSLD 1041.834 1046.951 1036.471 1025.403 1053.460 1041.781 1045.118 .888 .922 .881 1.036 .885 .914 .883 ZIMZ 73.551 82.351 70.551 56.834 84.421 72.976 74.825 .815 .859 .836 .986 .854 .855 .831 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ STATISTICS FOR 1 DAY SOLUTIONS: ------------------------------------------------------------------------------ DAY OBSERVATIONS PARAMETERS RMS (M) ------------------------------------------------------------------------------ 298 59474 1458 .0015 299 52324 1261 .0013 300 69553 1663 .0014 301 73802 1830 .0014 302 62368 1613 .0014 303 67420 1917 .0015 304 73369 1851 .0014 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ COORDINATE COMPARISON FOR 1 DAY SOLUTIONS: GPS WEEK 0981 ------------------------------------------------------------------------------ TOTAL NUMBER OF STATIONS: 16 ------------------------------------------------------------------------------ WEEKDAY RESIDUAL RMS IN MM STATION #DAYS 0123456 N E U ------------------------------------------------------------------------------ BORG 6 PPPPPP 2 6 20 BRUG 4 PPPP 1 5 4 GATR 3 PPP 8 15 21 GODZ 6 PPPPP P 9 20 30 IRKZ 7 PPPPPPP 13 10 11 KHAB 5 P PP PP 14 9 10 KR0G 7 PPPPPPP 4 7 4 LDS1 7 PPPPPPP 4 8 8 LRBA 2 PP 4 3 8 METZ 7 PPPPPPP 3 6 8 MTKA 1 P - - - OS0G 7 PPPPPPP 4 6 7 REYZ 7 PPPPPPP 5 6 9 SL1X 6 PPPPPP 6 12 16 VSLD 4 PPPP 8 21 45 ZIMZ 7 PPPPPPP - - - FIXED ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ STATISTICS FOR 3 DAY SOLUTIONS: ------------------------------------------------------------------------------ MID-DAY OBSERVATIONS PARAMETERS RMS (M) ------------------------------------------------------------------------------ 298 167327 3525 .0015 299 181351 3742 .0015 300 195679 3996 .0015 301 205723 4262 .0015 302 203590 4478 .0015 303 203157 4555 .0015 304 194827 4515 .0015 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ TRANSFORMATION PARAMETERS BETWEEN ITRF AND PZ90: ------------------------------------------------------------------------------ USAGE: | X | | X | | DX | | SCALE RZ -RY | | X | | Y | = | Y | + | DY | + | -RZ SCALE RX | * | Y | | Z | | Z | | DZ | | RY -RX SCALE | | Z | ITRF PZ90 PZ90 ------------------------------------------------------------------------------ RMS = RMS of transformed coordinates DX DY DZ RX RY RZ SCALE RMS DAY [m] [m] [m] [mas] [mas] [mas] [10E6] [m] ------------------------------------------------------------------------------ 298 .313 .276 -.768 24.65 -30.80 -414.96 .0028 4.63 299 .549 .553 -.405 24.77 -26.19 -404.71 -.0022 4.34 300 -.042 -.041 -1.109 32.33 -29.40 -386.19 .0213 3.49 301 -.618 .497 -.237 21.31 -40.58 -372.80 .0115 3.27 302 -.422 .529 -.546 24.21 -34.53 -367.04 .0205 3.87 303 -.056 .570 -.553 22.68 -29.54 -367.67 .0216 4.66 304 -.447 .683 .283 15.13 -37.17 -369.59 .0115 5.16 ------------------------------------------------------------------------------