From: Heinz Habrich Date: 17 Dec 1998 17:24:23 Subject: [IGEXMail-0122] ****************************************************************************** IGEX Electronic Mail 17-Dec-1998 17:24:23 Message No 0122 ****************************************************************************** Author: Heinz Habrich Subject: ****************************************************************************** BKG IGEX ANALYSIS REPORT GPS WEEK 0980 (DAYS 291 - 297, 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: ------------------------------------------------------------------------------ GLONASS Satellites: 103 104 106 109 110 111 112 113 115 116 117 118 120 122 ------------------------------------------------------------------------------ 291 18 23 17 23 46 18 29 18 31 22 29 16 21 17 292 8 29 33 9 84 12 34 15 26 32 41 10 10 15 293 23 26 24 22 49 13 23 12 22 19 21 20 8 11 294 24 14 34 16 40 31 14 9 28 30 21 29 24 16 295 9 18 56 17 38 28 44 13 18 45 26 8 19 11 296 21 20 33 26 58 18 41 16 14 28 21 9 30 20 297 41 12 36 60 21 61 42 30 25 49 46 14 35 51 ------------------------------------------------------------------------------ ALL 23 21 35 29 51 30 34 17 24 34 31 17 23 24 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ GLONASS/GPS TIME OFFSET: ------------------------------------------------------------------------------ OFFSET (NS) RMS ERROR (NS) DAY : 291 292 293 294 295 296 297 STATION ------------------------------------------------------------------------------ BORG 1033.951 1039.799 1036.761 1042.647 1039.087 1049.298 1052.580 .808 .875 .851 .987 .952 .864 .829 BRUG 983.018 989.582 980.350 1018.729 1052.169 1054.778 .843 .919 .890 1.025 .926 .988 GATR 88.248 10.077 102.499 76.494 74.216 2.857 3.216 5.888 2.537 1.770 GODZ 82.526 95.363 79.653 99.420 96.407 95.405 102.348 .869 .913 .895 1.160 .849 .873 .843 IRKZ 84.535 89.536 88.574 89.133 112.275 113.015 99.681 .809 .838 .861 .854 .905 .872 .827 KHAB 79.268 84.212 81.779 79.869 109.124 106.713 95.706 1.170 .902 .887 .901 .922 .872 .822 KR0G 21.029 27.344 23.339 28.543 39.864 39.200 39.349 .755 .813 .791 .885 .825 .792 .756 LDS1 -916.161 -910.097 -891.363 -879.796 -890.237 -896.376 1.621 1.452 1.403 1.157 1.212 1.389 LRBA 84.740 90.027 83.368 86.309 .788 .860 .834 .936 METZ 71.947 80.232 74.449 90.573 88.880 87.525 84.699 .872 1.061 .805 1.545 .838 .803 1.281 MTKA 86.844 .831 OS0G 99.054 92.250 95.495 1.040 .811 .778 REYZ 113.849 115.814 105.184 120.914 133.309 132.490 135.402 1.281 .829 .809 .947 .804 .783 .751 SL1X 61.362 82.334 79.574 87.233 .887 1.138 .976 .870 VSLD 1032.717 1039.510 1032.080 1041.373 1044.140 1050.852 1049.041 .836 .958 .895 1.037 .909 .971 .861 ZIMZ 67.622 73.262 65.545 78.041 97.078 81.632 81.855 .830 .909 .884 1.030 1.373 .846 .812 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ STATISTICS FOR 1 DAY SOLUTIONS: ------------------------------------------------------------------------------ DAY OBSERVATIONS PARAMETERS RMS (M) ------------------------------------------------------------------------------ 291 45562 1348 .0015 292 46263 1428 .0018 293 63103 1555 .0015 294 60519 1632 .0016 295 56989 1532 .0015 296 67182 2101 .0015 297 55525 1382 .0014 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ COORDINATE COMPARISON FOR 1 DAY SOLUTIONS: GPS WEEK 0980 ------------------------------------------------------------------------------ TOTAL NUMBER OF STATIONS: 16 ------------------------------------------------------------------------------ WEEKDAY RESIDUAL RMS IN MM STATION #DAYS 0123456 N E U ------------------------------------------------------------------------------ BORG 6 PPPPPP 6 11 27 BRUG 6 PPPPPP 5 7 14 GATR 5 PPPPP 6 9 22 GODZ 7 PPPPPPP 6 16 12 IRKZ 7 PPPPPPP 10 13 13 KHAB 7 PPPPPPP 13 10 4 KR0G 7 PPPPPPP 8 8 11 LDS1 6 P PPPPP 8 6 26 METZ 7 PPPPPPP 6 5 11 MTKA 1 P - - - OS0G 3 PPP 4 3 8 REYZ 7 PPPPPPP 5 9 7 SL1X 2 PP 4 12 8 VSLD 1 P - - - WTZG 4 PP P P 24 21 30 ZIMZ 7 PPPPPPP 1 2 1 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ STATISTICS FOR 3 DAY SOLUTIONS: ------------------------------------------------------------------------------ MID-DAY OBSERVATIONS PARAMETERS RMS (M) ------------------------------------------------------------------------------ 291 122242 3287 .0017 292 154928 3656 .0017 293 169885 3915 .0017 294 180611 4010 .0016 295 184690 4446 .0016 296 179696 4260 .0016 297 157310 3754 .0021 ------------------------------------------------------------------------------ ------------------------------------------------------------------------------ TRANSFORMATION PARAMETERS BETWEEN ITRF AND PZ90: ------------------------------------------------------------------------------ USAGE: | X | [ ] [ | X | | DX | | 1 RZ -RY | | X | ] | Y | = [ 1 + SCALE ] * [ | Y | + | DY | + | -RZ 1 RX | * | Y | ] | Z | [ ] [ | Z | | DZ | | RY -RX 1 | | Z | ] ITRF PZ90 PZ90 ------------------------------------------------------------------------------ RMS = RMS of transformed coordinates DX DY DZ RX RY RZ SCALE RMS [m] [m] [m] [mas] [mas] [mas] [10E6] [m] DAY ------------------------------------------------------------------------------ -.033 .081 -.138 24.67 -33.76 -386.88 .0161 4.06 291 -.658 .835 .767 18.17 -49.02 -382.34 .0084 4.09 292 -.565 .294 -.215 28.84 -41.38 -391.28 .0163 2.99 293 -.201 .231 -1.218 28.07 -37.78 -385.35 .0221 2.72 294 -.621 .580 -1.179 21.54 -44.42 -389.89 .0254 2.98 295 -.052 -.011 -.749 25.56 -33.68 -402.06 .0123 3.83 296 .428 .068 -.775 29.07 -29.89 -413.25 .0088 4.93 297 ------------------------------------------------------------------------------