Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1062 Day: 2 (May 16, 2000) Contacts: T.A. Springer (springer@aiub.unibe.ch) H. Bock (bock@aiub.unibe.ch), R. Dach (dach@aiub.unibe.ch) 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 11 days after the end of the GPS week. REMARKS on IGS Rapid Orbit Prediction Combination: 1. Clock corrections found in the IGP sp3 orbit file are clock predictions provided by COP. Users are reminded to use them with extreme caution. 2. The following orbit solutions were excluded from the combination because they were biasing the weighted average. They were still used for statistics computation unless all centres were excluded for the problem satellites in which case they were simply eliminated from the combination and statistics. The following table lists the exclusions: Centre | PRN list -------+--------------- USP | 2 _______________________________________________________________________________ Table 1: Daily transformation of each centre to the combined IGP orbit and clocks. 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 1.1062.2 GPS week: 1062 Day: 2 MJD: 51680.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.00 0.00 0.01 0.20 -0.45 1.26 -0.3 0.61 0.38 | 0.0 0.0 0.0 emp n/a|0.00 0.00 0.00 -0.17 -0.42 0.10 0.2 0.51 0.50 | 0.0 0.0 0.0 esp n/a|0.00 0.01-0.03 -1.12 -0.64 -2.08 0.0 0.61 0.35 | 0.0 0.0 0.0 gfp n/a|0.00 0.00 0.03 1.30 0.59 0.83 -0.2 0.81 0.44 | 0.0 0.0 0.0 jpp n/a|0.00 0.01 0.02 -0.09 0.79 0.34 0.2 0.72 0.64 | 0.0 0.0 0.0 sip n/a|-.03-0.01-0.01 0.20 0.67 -0.29 0.5 0.63 0.58 | 0.0 0.0 0.0 usp n/a|0.00 0.00 0.02 0.43 0.33 -0.61 -0.2 1.89 0.44 | 0.0 0.0 0.0 Table 2: Daily fit for each satellite and each centre resulting from weighted average combination. The last column gives the IGP resulting satellite accuracy measures found in the IGP SP3 header. Eclipsing satellites are flagged with and "E" beside the PRN number. "MEDI" stands for median of the centre's satellite RMS. Units: cm. Table 2.1062.2 GPS week: 1062 Day: 2 MJD: 51680.0 Weighted Average PRN | cop emp esp gfp jpp sip usp IGP | ------|----------------------------------| 1 | 20 8 12 5 9 78 9 11 | 2 | 23 13 96 41 154 44 856 121 | 3 | 3 13 9 13 15 12 30 6 | 4 | 8 4 15 10 11 23 12 5 | 5 | 285 122 230 192 83 38 167 77 | 6 | 11 16 10 13 14 28 19 6 | 7 | 4 9 9 8 6 14 7 3 | 8 | 14 9 28 13 17 41 34 9 | 9 | 10 4 27 12 12 36 14 7 | 10 | 15 20 47 149 110 101 10 30 | 11 | 26 20 6 18 31 42 65 12 | 13 | 26 20 13 9 17 152 18 20 | 15 | 10 15 7 8 40 45 38 10 | 16 | 33 32 33 26 76 62 53 19 | 17 | 13 11 9 8 8 13 7 4 | 18 | 60 43 103 155 132 82 276 50 | 19 | 19 63 11 16 23 30 103 18 | 21 | 38 35 26 128 28 135 170 33 | 22 | 48 11 75 178 30 75 162 35 | 24 | 5 8 19 15 5 17 21 5 | 25 | 10 7 23 8 11 31 22 7 | 26 | 6 10 13 11 17 43 7 7 | 27 | 18 3 29 8 22 40 13 9 | 29 | 47 196 87 92 106 95 43 47 | 30 | 20 55 41 167 224 23 85 43 | 31 | 27 5 18 24 6 42 64 11 | ------|----------------------------------| RMS | 61 51 61 81 72 63 189 | WRMS | 38 50 35 44 64 58 44 | MEDI | 19 13 21 14 20 42 32 |