Author: AC Coordinator / AIUB/CODE Rapid IGS Orbit Prediction Combination - Week 1069 Day: 1 (Jul 03, 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 | 11 JPP | 11 GFP | 11 SIP | 17 COP | 24 SIP | 29 EMP | 29 COP | 29 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 -------+----- EMP | 18 ESP | 18 _______________________________________________________________________________ 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 1.1069.1 GPS week: 1069 Day: 1 MJD: 51728.0 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------|------------------------------------------------|--------------------- cop n/a|0.00 0.00 0.05 -0.16 0.23 -0.74 -0.6 0.50 0.50 | 0.0 0.0 0.0 emp n/a|0.00 0.00 0.00 0.02 0.69 1.48 0.1 0.43 0.43 | 0.0 0.0 0.0 esp n/a|0.01-0.01-0.02 1.02 0.54 -0.30 0.2 3.29 3.70 | 0.0 0.0 0.0 gfp n/a|0.00 0.01 0.01 -0.69 -1.30 -0.12 -0.4 3.11 3.42 | 0.0 0.0 0.0 jpp n/a|0.00 0.00-0.02 0.23 0.68 -0.22 0.0 3.26 1.30 | 0.0 0.0 0.0 sip n/a|-.01-0.03 0.04 -0.39 -1.11 1.39 0.0 1.25 1.23 | 0.0 0.0 0.0 usp n/a|0.01 0.01 0.00 0.06 -0.84 -2.07 0.3 0.66 0.72 | 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 2.1069.1 GPS week: 1069 Day: 1 MJD: 51728.0 Weighted Average PRN | cop emp esp gfp jpp sip usp IGP | ------|----------------------------------| 1 | 9 53 14 26 16 70 42 14 | 2 | 14 10 10 13 17 63 30 8 | 3E | 16 21 61 37 15 70 56 15 | 4 | 9 12 17 24 6 111 40 11 | 5 | 16 42 16 27 11 50 41 12 | 6E | 48 11 95 33 20 115 21 20 | 7E | 57 55 187 26 16 35 23 32 | 8 | 21 22 17 23 13 76 32 10 | 9 | 15 31 19 17 8 54 26 9 | 10 | 29 59 30 44 33 114 38 19 | 11 | 16 19 >>> >>> >>> 261 40 826 | 13 | 11 12 13 15 15 122 26 11 | 15 | 70 67 78 58 88 35 95 30 | X16 | 46 23 24 20 --- 69 139 26 | X17 | 132 103 83 108 92 676 --- 87 | 19 | 39 15 20 18 14 220 46 20 | 20 | 22 29 36 13 23 39 110 17 | 21 | 22 14 23 13 11 28 18 7 | 22 | 195 141 194 187 196 191 212 76 | X24 | 728 10 17 32 --- 63 50 201 | 25 | 18 15 24 11 7 261 84 24 | 26 | 18 24 12 12 9 76 52 11 | 27 | 20 14 21 10 7 81 26 9 | X29 | 617 620 11 32 22 207 --- 395 | 30 | 14 28 14 15 6 142 15 13 | 31E | 19 10 19 108 137 66 33 31 | ------|----------------------------------| RMS | 50 43 329 311 326 124 66 | WRMS | 50 43 370 342 130 123 72 | MEDI | 21 23 21 25 16 76 40 |