Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1060 Day: 2 (May 02, 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_02 | 2000057 (Predicted) 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 -------+--------------- JPP | 5 SIP | 7 SIP | 29 SIP | 4 SIP | ALL (high Transformation - See Table 1) GFP | 30 _______________________________________________________________________________ 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 1.1060.2 GPS week: 1060 Day: 2 MJD: 51666.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.01-0.01 0.00 0.55 0.23 -0.66 -0.4 0.51 0.31 | 0.0 0.0 0.0 emp n/a|0.00 0.00-0.02 0.77 0.53 0.30 0.1 0.60 0.60 | 0.0 0.0 0.0 esp n/a|-.01 0.00-0.01 0.03 -0.02 0.71 0.3 0.56 0.19 | 0.0 0.0 0.0 gfp n/a|0.00 0.00 0.01 0.18 1.00 0.44 -0.4 0.98 0.25 | 0.0 0.0 0.0 jpp n/a|0.01 0.00 0.00 -1.86 -3.18 -1.80 0.6 2.09 0.34 | 0.0 0.0 0.0 sip n/a|0.01 0.05-0.11 0.90 0.60-13.16 0.3 2.92 1.22 | 0.0 0.0 0.0 usp n/a|0.01 0.00 0.04 -0.15 0.47 -0.25 -0.1 0.72 0.53 | 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 2.1060.2 GPS week: 1060 Day: 2 MJD: 51666.0 Weighted Average PRN | cop emp esp gfp jpp sip usp IGP | ------|----------------------------------| 1 | 17 7 8 8 22 140 93 12 | X2E | 14 60 28 --- 64 376 25 21 | 3 | 42 22 15 13 43 178 58 14 | 4 | 37 9 23 8 37 561 9 10 | 5E | 174 134 121 73 984 63 19 204 | 6 | 29 5 18 7 34 189 42 10 | 7 | 7 7 5 18 20 745 38 7 | 8 | 18 17 18 4 24 227 37 8 | 9 | 53 22 23 16 24 105 23 13 | 10 | 13 14 3 6 19 50 13 5 | 11 | 14 12 8 6 29 145 25 7 | 13 | 20 9 10 5 23 254 18 6 | 15 | 32 9 20 10 38 62 12 10 | 16 | 30 9 5 20 19 194 13 8 | 18 | 44 144 25 37 44 54 88 30 | 19 | 43 7 26 8 23 378 10 10 | 21 | 35 48 7 11 28 171 90 16 | 22E | 101 86 152 74 103 300 224 53 | 24 | 47 34 17 10 39 156 87 16 | 25 | 15 12 9 11 26 61 13 6 | 26 | 17 18 10 7 19 275 47 8 | 27 | 27 20 20 10 23 180 16 9 | 29 | 61 181 52 79 72 683 115 43 | 30E | 25 19 169 456 209 177 116 158 | 31 | 11 32 10 6 40 47 35 10 | ------|----------------------------------| RMS | 51 60 56 98 209 293 72 | WRMS | 31 60 19 25 34 122 53 | MEDI | 29 18 18 10 29 178 35 |