Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1054 Day: 0 (Mar 19, 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 | 14 USP | 9 SIP | 19 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 | 14 EMP | 14 _______________________________________________________________________________ Table 1.1054.0 GPS week: 1054 Day: 0 MJD: 51622.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.00 0.00 0.02 0.04 0.18 1.96 0.1 0.56 0.27 | 0.0 0.0 0.0 emp n/a|0.00 0.01 0.00 0.62 1.02 -2.91 -0.9 0.51 0.43 | 0.0 0.0 0.0 esp n/a|0.00 0.00-0.09 -0.01 0.42 1.60 -0.2 0.54 0.18 | 0.0 0.0 0.0 gfp n/a|0.01-0.01 0.03 -0.14 -1.76 -2.71 -0.2 0.91 0.26 | 0.0 0.0 0.0 jpp n/a|0.00-0.01 0.02 -1.03 1.37 0.86 0.5 1.30 0.29 | 0.0 0.0 0.0 sip n/a|-.04-0.01 0.05 -0.44 0.00 4.24 0.1 2.13 1.03 | 0.0 0.0 0.0 usp n/a|0.00 0.00-0.02 -0.10 -0.81 0.48 0.4 2.11 0.50 | 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 2.1054.0 GPS week: 1054 Day: 0 MJD: 51622.0 Weighted Average PRN | cop emp esp gfp jpp sip usp IGP | ------|----------------------------------| 1 | 49 13 29 27 17 14 5 12 | 2 | 5 21 9 27 17 104 12 9 | 3 | 8 18 21 13 19 86 29 9 | 4E | 48 21 148 61 207 98 89 40 | 5 | 5 15 21 19 32 330 9 22 | 6 | 43 20 11 23 14 162 8 14 | 7 | 9 40 13 13 15 22 18 9 | X8E | 40 24 41 61 168 240 --- 33 | 9E | 94 92 98 81 126 22 918 168 | 10 | 30 27 13 10 17 69 7 9 | 11E | 49 65 25 42 112 380 123 37 | 13 | 7 33 15 9 40 50 14 9 | X15E | 137 259 431 --- --- --- --- 207 | 16 | 82 59 15 8 24 146 203 37 | 17E | 64 30 54 25 63 167 36 22 | X18 | 26 25 19 13 --- 63 15 10 | 19E | 184 139 82 381 391 709 232 117 | 21 | 30 17 7 38 37 180 39 16 | 22 | 17 24 13 25 17 77 37 11 | 24E | 35 86 45 81 211 17 102 36 | 25E | 42 69 122 63 233 24 38 38 | 26 | 21 22 22 13 18 117 15 11 | 27E | 11 30 15 72 185 249 31 29 | 29 | 11 17 19 12 16 100 18 9 | X30 | 16 16 21 6 20 --- 9 7 | 31 | 29 31 24 42 32 51 9 12 | ------|----------------------------------| RMS | 56 51 54 91 130 213 211 | WRMS | 27 43 18 26 29 103 50 | MEDI | 30 26 21 25 32 99 24 |