Author: AC Coordinator / GFZ Potsdam Ultra Rapid IGS Orbit Comparison - Week 1227 Day: 2 Hour: 12 (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: 52835.5 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- brd |-.30-0.23 0.06 -0.99 1.62 0.14 11.7 2.46 2.46 | 0.2 1.8 12.90 cou n/a|0.01 0.00-0.01 0.06 1.15 -1.75 -0.3 0.38 0.06 | 7.5 -41.2 149.10 emu n/a|0.00 0.00 0.01 -0.37 -0.08 0.76 -0.3 0.21 0.11 | 110.9 4.1 3.35 esu n/a|0.02 0.00-0.06 -1.67 -0.37 1.25 0.1 0.18 0.16 | 110.0 1.4 3.79 gfu n/a|0.01-0.01 0.00 0.25 0.72 0.14 -0.3 0.16 0.14 | -1.8 -2.0 4.88 siu n/a|0.01 0.00 0.00 0.02 -0.37 0.06 -0.3 0.22 0.13 | 0.0 0.0 0.00 usu n/a|0.00 0.00 0.01 -0.25 0.17 0.26 0.3 0.19 0.10 | -213.2 -14.2 3.81 igu n/a|0.00-0.01 0.00 -0.32 0.23 0.55 -0.2 0.13 0.07 | -1.3 -1.1 3.39 igr n/a|0.00 0.00 0.00 0.00 0.00 0.00 0.0 0.00 0.00 | -0.8 1.0 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: 52835.5 Weighted Average PRN | brd cou emu esu gfu siu usu igu igr IGR | ------|------------------------------------------| 1 | 197 6 10 20 7 9 6 7 0 0 | 2 | 98 38 20 24 18 38 27 17 0 0 | 3 | 88 8 6 15 5 21 6 2 0 0 | 4E | 202 6 15 29 27 13 24 17 0 0 | 5 | 89 5 4 14 3 8 8 5 0 0 | 6 | 205 4 6 10 20 39 8 10 0 0 | 7 | 153 9 21 10 17 16 13 13 0 0 | 8 | 146 36 50 26 37 20 20 30 0 0 | 9 | 72 8 5 21 10 24 4 4 0 0 | 10 | 206 8 9 19 5 23 6 4 0 0 | 11E | 130 4 8 17 16 24 9 5 0 0 | 13 | 114 4 9 17 7 7 7 7 0 0 | 14 | 147 8 5 8 14 15 12 9 0 0 | 15E | 209 10 43 --- --- 7 --- --- 0 0 | 16 | 104 8 5 13 17 13 10 8 0 0 | 17E | 855 14 --- --- --- 51 --- --- 0 0 | 18 | 154 6 9 15 5 12 7 5 0 0 | 20 | 122 4 9 16 4 9 10 5 0 0 | 21E | 171 5 16 9 47 15 26 13 0 0 | 23 | 597 7 9 --- 7 8 13 7 0 0 | 24E | 172 152 61 24 --- 14 --- 38 0 0 | 25 | 121 3 4 16 9 5 7 6 0 0 | 27 | 73 7 5 11 8 8 6 4 0 0 | 28 | 120 5 4 6 4 30 9 4 0 0 | 29 | 224 107 41 42 23 38 80 30 0 0 | 30 | 85 6 9 12 5 9 9 7 0 0 | 31 | 103 7 5 17 8 16 9 4 0 0 | ------|------------------------------------------| RMS | 246 38 21 18 16 22 19 13 0 | WRMS | 246 6 11 16 14 13 10 7 0 | MEDI | 146 7 9 16 9 15 9 7 0 |