Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1060 Day: 5 (May 05, 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. Because of a maneuver, some satellites were excluded from the Prediction combination. The following table lists the maneuvered satellites: PRN | Date | Ref. NANU ----+------------+----------- 17 | 2000_05_03 | 2000059 3. 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 -------+--------------- SIP | 19 SIP | ALL (high Transformation - See Table 1) ESP | 30 JPP | 5 _______________________________________________________________________________ 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 1.1060.5 GPS week: 1060 Day: 5 MJD: 51669.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.01 0.00 0.02 -0.24 0.12 0.21 0.0 0.34 0.23 | 0.0 0.0 0.0 emp n/a|0.01 0.00 0.00 -0.29 0.62 0.97 0.1 0.54 0.41 | 0.0 0.0 0.0 esp n/a|0.00 0.01-0.04 -0.77 -0.41 -2.73 0.0 1.03 0.22 | 0.0 0.0 0.0 gfp n/a|0.00 0.00 0.02 0.10 0.00 0.87 -0.1 0.42 0.16 | 0.0 0.0 0.0 jpp n/a|0.00 0.00-0.01 1.53 0.27 0.35 0.1 0.82 0.17 | 0.0 0.0 0.0 sip n/a|-.01 0.01-0.03 -0.08 0.48 -5.94 -0.1 2.81 0.60 | 0.0 0.0 0.0 usp n/a|0.00 0.00 0.04 -0.50 -0.49 -1.38 0.4 0.77 0.37 | 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 2.1060.5 GPS week: 1060 Day: 5 MJD: 51669.0 Weighted Average PRN | cop emp esp gfp jpp sip usp IGP | ------|----------------------------------| 1 | 15 12 18 9 15 31 14 6 | 2E | 51 110 167 100 74 131 245 52 | 3 | 6 33 8 25 56 226 66 14 | 4 | 12 14 13 15 13 19 17 6 | 5E | 23 17 240 113 342 39 30 94 | 6 | 30 26 12 8 20 12 59 11 | 7 | 15 12 7 7 9 73 33 6 | 8 | 25 32 28 14 9 22 35 10 | 9 | 18 32 10 17 11 295 11 8 | 10 | 28 25 7 8 44 66 40 11 | 11 | 20 13 23 16 41 182 31 11 | 13 | 31 14 17 12 11 94 26 9 | 15 | 11 19 13 7 17 56 40 7 | 16 | 34 32 18 30 17 20 27 13 | 18 | 7 25 28 11 20 122 152 18 | 19 | 22 180 18 46 24 >>> 74 29 | 21 | 12 19 20 9 14 20 44 8 | 22E | 67 62 50 35 169 100 99 37 | 24 | 36 64 35 20 38 73 34 16 | 25 | 7 25 28 10 21 70 41 9 | 26 | 9 18 13 6 22 30 32 7 | 27 | 30 29 29 17 8 21 16 10 | 29 | 6 12 27 15 13 140 33 8 | 30E | 106 100 414 113 79 41 162 108 | 31 | 18 10 20 6 12 110 18 6 | ------|----------------------------------| RMS | 34 54 104 42 82 281 77 | WRMS | 23 41 22 16 17 60 37 | MEDI | 20 25 20 15 20 70 34 |