Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1053 Day: 3 (Mar 15, 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 | 18 USP | 18 USP | 9 ESP | 19 JPP | 27 COP | 16 ESP | 15 SIP | 19 ESP | ALL (high Transformation - See Table 1) 3. The following orbit solutions were rejected from the combination due to lack of redundancy, i.e. not enough centres providing a solution (=> Minimum number of centres: 3): Centre | PRN -------+----- COP | 15 EMP | 15 COP | 18 _______________________________________________________________________________ Table 1.1053.3 GPS week: 1053 Day: 3 MJD: 51618.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.00-0.01-0.02 0.28 -0.11 0.67 0.0 0.45 0.43 | 0.0 0.0 0.0 emp n/a|0.00 0.00 0.01 0.06 -0.59 -1.88 -0.2 0.36 0.36 | 0.0 0.0 0.0 esp n/a|0.00-0.01-0.05 -0.26 -1.39 10.40 1.3 1.56 0.48 | 0.0 0.0 0.0 gfp n/a|0.00 0.00-0.02 -0.03 -2.08 -0.37 0.1 0.78 0.22 | 0.0 0.0 0.0 jpp n/a|0.00 0.00 0.05 -0.11 1.86 0.43 0.3 1.31 0.21 | 0.0 0.0 0.0 sip n/a|0.01-0.01 0.00 0.23 0.18 -2.74 -0.6 1.22 1.25 | 0.0 0.0 0.0 usp n/a|0.00 0.00-0.02 -0.21 -0.96 0.32 0.2 1.91 0.39 | 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 2.1053.3 GPS week: 1053 Day: 3 MJD: 51618.0 Weighted Average PRN | cop emp esp gfp jpp sip usp IGP | ------|----------------------------------| 1 | 27 22 30 18 11 185 20 16 | 2 | 7 14 32 16 5 181 13 14 | 3 | 14 15 60 15 7 157 22 13 | X4E | 22 81 180 198 --- 200 31 48 | 5 | 26 29 23 7 18 66 21 11 | 6 | 8 16 80 20 28 17 6 8 | 7 | 11 11 69 8 12 37 8 5 | X8E | 53 93 274 230 188 118 --- 75 | 9E | 146 61 288 198 233 316 801 224 | 10 | 28 21 36 43 22 47 5 11 | 11E | 15 84 410 181 10 126 14 33 | 13 | 10 46 25 9 42 32 15 14 | X14 | 34 15 57 16 9 --- 31 11 | X16 | 580 19 127 11 --- 31 15 194 | 17E | 81 50 312 178 10 112 17 33 | X19E | 196 180 639 --- 158 416 146 106 | 21 | 26 13 48 11 11 45 17 8 | 22 | 11 12 22 3 8 38 18 6 | X24E | 51 56 215 --- 160 195 100 56 | X25E | 36 30 142 --- 119 156 108 46 | 26 | 35 33 45 36 9 83 29 14 | 27E | 14 56 240 27 498 22 48 157 | 29 | 19 27 35 28 31 79 97 23 | 30 | 32 20 32 21 15 92 12 11 | 31 | 36 12 63 4 16 123 7 12 | ------|----------------------------------| RMS | 45 36 156 78 131 122 191 | WRMS | 43 36 48 22 21 125 39 | MEDI | 27 27 63 19 16 102 19 |