Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1088 Day: 2 (Nov 14, 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 -------+--------------- ESP | 24 _______________________________________________________________________________ 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 1.1088.2 GPS week: 1088 Day: 2 MJD: 51862.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.00 0.00 0.01 0.92 -1.24 0.79 -0.3 0.24 0.16 | 0.0 0.0 0.00 emp n/a|0.00 0.00 0.01 -1.32 0.96 0.70 0.4 0.33 0.21 | 0.0 0.0 0.00 esp n/a|0.00-0.01 0.05 1.68 -1.77 -2.77 -1.4 3.63 4.29 | 0.0 0.0 0.00 gfp n/a|0.00 0.00-0.03 -0.50 1.45 0.10 -0.1 0.72 0.36 | 0.0 0.0 0.00 sip n/a|-.03 0.00 0.02 -0.19 0.19 -3.35 0.6 1.90 1.24 | 0.0 0.0 0.00 usp n/a|0.00 0.00-0.03 -0.47 1.48 -1.86 -0.1 0.93 0.43 | 0.0 0.0 0.00 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 2.1088.2 GPS week: 1088 Day: 2 MJD: 51862.0 Weighted Average PRN | cop emp esp gfp sip usp IGP | ------|------------------------------| 1 | 8 24 64 13 60 7 9 | 2 | 9 10 29 33 73 59 13 | 3 | 3 12 41 39 178 7 14 | 4 | 18 15 69 30 202 42 18 | 5 | 19 20 63 68 236 82 25 | 6 | 9 20 35 17 201 19 15 | 7 | 5 13 149 28 148 17 18 | 8 | 7 19 63 20 35 27 9 | 9 | 6 15 57 15 37 8 7 | 10E | 33 57 333 148 45 7 40 | 11 | 11 13 70 17 139 44 14 | 13 | 7 18 82 17 23 11 9 | X15 | 8 11 --- 45 102 --- 14 | 17 | 7 8 50 24 147 24 12 | 19 | 54 101 494 77 37 82 55 | 20E | 41 9 203 194 151 26 37 | 21E | 7 11 55 117 106 88 24 | 22 | 11 24 37 43 238 16 19 | 24 | 79 74 >>> 143 354 414 195 | 25 | 10 29 96 15 147 18 15 | 26 | 4 22 119 25 32 7 13 | 27 | 20 23 38 15 84 11 11 | 28 | 27 30 55 81 73 76 21 | 29 | 6 29 102 44 347 57 28 | 30 | 10 15 72 89 494 62 38 | 31 | 9 10 28 28 187 43 16 | ------|------------------------------| RMS | 24 33 363 72 189 93 | WRMS | 16 21 429 36 124 43 | MEDI | 9 19 64 32 143 26 |