Author: AC Coordinator / GFZ Potsdam Ultra Rapid IGS Orbit Comparison - Week 1227 Day: 2 Hour: 00 (Jul 15, 2003) Contacts: G. Gendt (gendt@gfz-potsdam.de), Th. Nischan (nisn@gfz-potsdam.de) COMBINATION STRATEGY: For a complete description of the combination strategy along with all tables and statistics, please refer to the IGS Final Combination reports posted on CDDIS within 13 days after the end of the GPS week. REMARKS on IGS Ultra Rapid Orbit Comparison: 1. The following Ultra-rapid orbits were excluded from the combination but kept for statistics: -> Centre: COU EMU ESU GFU SIU USU IGU 2. Because of a maneuver, some satellites were excluded from the Prediction combination. The following table lists the maneuvered satellites: PRN | Date | Ref. NANU ----+------------+----------- 26 | 2003_Jul_15 | (Predicted) 26 | 2003_Jul_15 | 26 | 2003_Jul_15 | (Predicted) 26 | 2003_Jul_15 | _______________________________________________________________________________ Table 1: Daily transformation of each centre to the combined IGS Rapid orbit and clocks (IGR). WRMS - RMS weighted by the centres SP3 header accuracy codes. STA - Number of stations in the daily solutions. Units: meters, mas, ppb, nano-sec, nano-sec/day. Table 1.1227.2 GPS week: 1227 Day: 2 MJD: 52835.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- brd n/a|0.41 0.28 0.11 -4.13 -1.29 2.18 17.2 2.06 2.06 | 11.7 -35.2 51.39 cou n/a|0.00-0.02 0.00 0.47 1.64 -4.38 0.1 0.88 0.07 | -1.3 8.2 27.68 emu n/a|0.03 0.00 0.02 -0.10 -0.09 0.90 -0.5 0.28 0.09 | -206.1 -12.5 4.03 esu n/a|0.03-0.01-0.02 -1.06 1.57 -0.07 0.1 0.24 0.12 | 109.6 0.6 4.06 gfu n/a|-.02 0.00 0.00 0.01 -0.08 0.02 -0.2 0.15 0.15 | 0.1 0.8 5.38 siu n/a|0.03 0.00-0.01 -0.71 0.01 -0.61 -0.5 0.23 0.18 | 0.0 0.0 0.00 usu n/a|0.01-0.01 0.00 0.15 -0.11 -0.65 -0.1 0.31 0.12 | -206.5 -13.7 3.79 igu n/a|0.01 0.00 0.01 -0.30 0.21 0.13 -0.1 0.15 0.08 | -1.3 1.7 3.81 igr n/a|0.00 0.00 0.00 0.00 0.00 0.00 0.0 0.00 0.00 | -1.2 5.8 0.00 Table 2: Daily fit for each satellite and each centre resulting from the comparison of the individual solutions to the IGS Rapid solution. The "igr" and "IGR" columns are zero since all centres are compared to the "igr" solution. Eclipsing satellites are flagged with and "E" beside the PRN number. "MEDI" stands for median of the centre's satellite RMS. Units: cm. Table 2.1227.2 GPS week: 1227 Day: 2 MJD: 52835.0 Weighted Average PRN | brd cou emu esu gfu siu usu igu igr IGR | ------|------------------------------------------| 1 | 208 4 4 7 6 11 12 2 0 0 | 2 | 76 29 11 10 20 18 18 9 0 0 | 3 | 207 7 6 7 17 4 4 6 0 0 | 4E | 117 22 18 36 28 10 43 20 0 0 | 5 | 71 7 7 11 3 21 10 6 0 0 | 6 | 235 6 8 8 10 10 9 6 0 0 | 7 | 218 20 14 22 8 6 7 10 0 0 | 8 | 98 43 11 8 32 16 29 9 0 0 | 9 | 85 26 6 12 4 11 8 4 0 0 | 10 | 207 12 6 8 5 22 8 6 0 0 | 11E | 107 9 13 25 9 9 6 8 0 0 | 13 | 122 6 5 15 7 27 8 4 0 0 | 14 | 118 6 15 10 14 20 15 8 0 0 | 15E | 236 25 33 --- --- 46 --- --- 0 0 | 16 | 94 12 10 7 5 29 10 8 0 0 | 17E | 472 260 103 81 --- 43 --- --- 0 0 | 18 | 105 9 8 11 10 16 8 6 0 0 | 20 | 126 6 7 28 6 10 7 6 0 0 | 21E | 141 26 28 36 19 15 80 18 0 0 | 23 | 579 14 11 --- 5 32 13 10 0 0 | 24E | 177 335 78 25 --- 24 119 59 0 0 | 25 | 122 15 8 15 10 10 11 4 0 0 | 27 | 77 8 6 5 12 34 5 4 0 0 | 28 | 105 16 13 15 11 36 18 15 0 0 | 29 | 222 150 32 40 44 33 35 27 0 0 | 30 | 82 7 9 7 3 8 9 3 0 0 | 31 | 199 8 6 10 10 12 6 4 0 0 | ------|------------------------------------------| RMS | 206 88 28 24 15 23 31 15 0 | WRMS | 206 7 9 12 15 18 12 8 0 | MEDI | 122 12 10 11 10 16 10 6 0 |