From igsacc at gfz-potsdam.de Fri Jan 5 04:39:24 2007 From: igsacc at gfz-potsdam.de (Gerd Gendt3) Date: Fri, 05 Jan 2007 13:39:24 +0100 Subject: [IGSREPORT-14637] Wk 1406 IGLOS Final Orbits Message-ID: <459E46FC.mailxL0Y1MWILC@kg20> ****************************************************************************** IGS Electronic Report 05 Jan 04:39:30 PST 2007 Message Number 14637 ****************************************************************************** Author: AC Coordinator / GFZ Potsdam IGLOS Orbit Combination - Week 1406 (Dec 17, 2006 - Dec 23, 2006) Contact: Gerd Gendt (gendt at gfz-potsdam.de) Thomas Nischan ( nisn at gfz-potsdam.de) COMBINATION STRATEGY: --------------------- Ephemeris are combined as weighted averages computed over all centres. Each centre and satellite is given a position weight computed from the centers absolute deviation to the unweighted average orbit after removing small differences in the reference frames. These weights were applied in a second iteration to estimate Helmert transformation parameters for each center. Finally the transformation parameters with respect to the combined solution and the RMS of the fit are reported in Tables 2.1406. For long arc computations the Earth Orientation Parameters (EOPs) are fixed to the values of the final IGS (GPS) combination. SOFTWARE: --------- The weighted average software used was originally developed by T. Springer and G. Beutler in 1993. The GPS long arc orbit analysis software used here for individual centre ephemeris evaluation was developed by Beutler et al. at the Astronomical Institute of the University of Bern (AIUB). For more details on the orbit combination and complete references for both software see: Beutler G., Kouba J. and T. Springer, 1995, Combining the orbits of the IGS Analysis Centers, Bulletin Geodesique, 69, pp 200-222. Kouba J., Mireault Y. and F. Lahaye, 1995, 1994 IGS Orbit/Clock Combination and Evaluation, Appendix I of the Analysis Coordinator Report, International GPS Service for Geodynamics (IGS) 1994 Annual Report, pp. 70-94. Kouba J. and Y. Mireault, 1996, IGS Analysis Coordinator Report, International GPS Service for Geodynamics (IGS) 1995 Annual Report, pp. 45-76. Kouba J. and Y. Mireault, 1997, Analysis Coordinator Report, International GPS Service for Geodynamics (IGS) 1996 Annual Report, pp. 55-100. Weber R., 2000, IGS Technical Report 1999 PRODUCTS GENERATED: ------------------- The combined IGL-ephemerides are written to daily files in the SP3-format. The satellite accuracy codes in the header are based on the weighted rms. for each satellite. Note, that the result files contain all satellites that were analysed by at least one center. We refer to the 'REMARKS' section below, in case a satellite or center was excluded from the combination. The following naming convention is used for the result files: igl1406[0-6].sp3 IGLOS-PP Glonass ephemerides files for days 0-6 of GPS Week 1406 in the SP3 format. igl14067.sum Combination Report for GPS Week 1406. REMARKS concerning the IGL Orbit Combination: --------------------------------------------- 1. Broadcast (brd) orbits and clocks are included in the combination for statistics only. 2. Having only a few satellites the mcc orbits are included in the combination for statistics only. 3. Starting on 01-May-2005 (GPS Week 1321; MJD 53491)[IGSMAIL-5151] BKG, ESA, and CODE will start to refer their GLONASS orbit products to the following satellite antenna offset (SAO) values: X/Y/Z = 0.000/0.000/0.000 meter for GLONASS and X/Y/Z = -0.545/0.000/0.000 meter for GLONASS-M SVs. 4. The satellite clock values in the combined orbit files are taken from the broadcast files. The following gps/glonass time offsets derived from the bkg summary files were added to the broadcast clocks. Day | applied clock offset ----+--------------------- 0 | 651.7 ns 1 | 663.6 ns 2 | 636.9 ns 3 | 600.1 ns 4 | 598.4 ns 5 | 697.9 ns 6 | 689.6 ns 5. The following orbit solutions were excluded from the combination because they were biasing the weighted average (generally indicated by long arc RMS). Day | Centre | PRN list ----+--------+--------------- 0 | ESX | R22 R23 R24 0 | IAC | R04 1 | ESX | R23 R24 1 | IAC | R04 2 | IAC | R04 3 | ESX | R24 4 | ESX | R23 R24 5 | ESX | R24 6 | ESX | R24 ORBIT COMBINATION AND EVALUATION STATISTICS: -------------------------------------------- Table 1 summarizes all statistics for the week. It contains means and standard deviations over the week of satellite ephemeris and clock correction transformation parameters for each centre (Tables 1.1406, 1a.1406). Table 2 contains the complete ephemeris and clock correction transformation parameters (includes both the apriori and a posteriori values) for each centre and each day (Tables 2.1406.0-6) Table 3 contains two types of daily RMS for each satellite and centre, along with the computed satellite position sigmas for the combined orbits (tables 3.1406.0-6). The first type of satellite RMS is based on orbit combination and the second RMS type is a result of the 7-day arc evaluation of each centre ephemerides. Table 1: Week 1406 summary. (Dec 17, 2006 - Dec 23, 2006) Table 1.1406.a GPS week : 1406 MJD: 54086.0-54092.0 Mean and standard deviations of transformation parameters to the combined IGL orbit. WRMS - orbit RMS weighted by the SP3 header accuracy codes. STA - Mean number of stations in the daily solutions. Units: mas, ppb, meters, nano-sec, nano-sec/day. CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50| .00 -.00 -.00 .08 .00 -.03 -.0 .05 .04 | .0 -.5 4.06 | .00 .00 .00 .05 .04 .18 .1 | .0 1.2 cod 172|-.01 -.00 .01 .12 -.06 .07 -.1 .06 .04 | --- --- --- | .01 .00 .01 .07 .08 .16 .1 | --- --- esx 42| .00 .00 -.01 .13 .03 .07 -.2 .18 .07 | 249.7 -7.1 10.42 | .01 .01 .02 .12 .12 .20 .1 | 682.0 11.8 iac n/a| .00 -.00 -.01 -.29 .05 -.05 .2 .13 .13 | 648.3 .9 10.75 | .00 .00 .01 .03 .08 .09 .2 | 37.0 6.1 Table 1.1406.b GPS week : 1406 MJD: 54086.0-54092.0 Satellite position sigmas for the combined orbits (coded in the IGS SP3 orbit files). "E" flags eclipsing satellites. Units: cm. Day of GPS week PRN | 0 1 2 3 4 5 6 | Remarks ------+-----------------------------+------------------------------------------ R01 | 2 2 3 2 2 2 2 | R02 | 3 2 2 2 2 2 2 | R03 | 0 0 0 0 0 18 0 | R04 | 18 14 92 19 3 3 3 | R06 | 3 4 5 2 3 2 4 | R07 | 3 2 1 2 2 2 2 | R08 | 3 2 3 3 2 3 2 | R18 | 3 3 4 3 4 4 3 | R19 | 1 3 3 3 4 4 2 | R21 | 3 3 4 3 5 4 4 | R22 | 2 3 3 4 3 2 2 | R23 | 6 4 9 11 --- --- --- | R24 | 3 3 3 2 2 2 2 | Table 1.1406.c GPS week : 1406 MJD: 54086.0-54092.0 Daily transformation of broadcast orbits (brd) to the combined IGL orbit. Mean and standard deviations of the transformation parameters for the whole gpsweek. Units: mas, ppb, meters, nano-sec, nano-sec/day CEN WEEK DAY | DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS -------------+-------------------------------------------------------------+--------------------- brd 1406 0 | -.50 .17 -2.23 -1.42 5.75 -361.60 79.2 4.41 4.41 | 651.7 .0 .0 brd 1406 1 | .41 .47 -2.00 -4.78 12.07 -364.70 85.8 4.57 4.57 | 663.6 .0 .0 brd 1406 2 | -.25 .18 -1.61 -2.34 5.53 -364.80 89.5 7.06 7.06 | 636.9 .0 .0 brd 1406 3 | .26 -.22 -2.28 -2.70 21.30 -342.80 98.1 8.06 8.06 | 600.1 .0 .0 brd 1406 4 | .21 .04 -1.71 -3.28 7.11 -359.00 77.1 8.59 8.59 | 598.4 .0 .0 brd 1406 5 | -.23 -.16 -1.69 -4.27 14.16 -361.00 86.0 6.46 6.46 | 697.9 .0 .0 brd 1406 6 | .09 -.36 -1.85 4.52 18.93 -344.80 107.2 5.58 5.58 | 689.6 .0 .0 -------------+-------------------------------------------------------------+--------------------- brd 1406 mean| -.00 .02 -1.91 -2.04 12.12 -356.96 89.0 6.39 6.39 | 648.3 .0 .0 brd 1406 sdev| .33 .28 .27 3.11 6.38 9.24 10.6 1.63 1.63 | 39.5 .0 .0 Table 2: Daily transformation of each centre to the combined IGL orbit and clocks for each day of the week. The transformation displayed is the sum of a priori and estimated transformations. WRMS - RMS weighted by the centres SP3 header accuracy codes. STA - Number of stations in the daily solutions. Units: mas, ppb, meters, nano-sec, nano-sec/day. Table 2.1406.0 GPS week: 1406 Day: 0 MJD: 54086 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50| .00 -.01 -.00 .06 -.00 -.17 .0 .04 .05 | .0 -.2 3.35 cod 172| .00 .00 .01 .18 .00 .22 -.2 .04 .05 | --- --- --- esx 42| .01 -.00 -.04 .19 -.09 .38 -.2 .24 .08 | 1793.9 -.3 7.06 iac n/a|-.01 -.00 .01 -.29 .06 -.06 .4 .05 .05 | 652.8 .4 8.48 Table 2.1406.1 GPS week: 1406 Day: 1 MJD: 54087 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50| .01 -.00 .00 .02 .03 -.04 -.1 .06 .04 | .0 -.2 2.81 cod 172|-.01 .00 .02 .18 -.13 .20 -.1 .08 .03 | --- --- --- esx 42| .00 .01 -.01 .10 -.03 -.03 -.3 .20 .07 | 14.5 -10.6 9.03 iac n/a| .00 -.00 -.02 -.34 .11 -.09 .3 .65 .65 | 664.2 -4.0 9.24 Table 2.1406.2 GPS week: 1406 Day: 2 MJD: 54088 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50|-.01 .00 .00 .05 -.05 -.16 -.0 .05 .06 | .0 .0 3.84 cod 172|-.01 -.00 .02 .11 -.03 .20 -.1 .07 .04 | --- --- --- esx 42| .00 .00 -.02 .12 -.08 .18 -.1 .12 .05 | -28.4 3.9 11.53 iac n/a| .00 -.00 -.01 -.29 .08 -.03 .4 .07 .07 | 632.8 10.2 11.32 Table 2.1406.3 GPS week: 1406 Day: 3 MJD: 54089 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50| .01 -.01 -.01 .12 .06 -.22 -.1 .06 .05 | .0 -3.1 5.32 cod 172|-.02 .01 .02 .19 .02 .07 .1 .08 .04 | --- --- --- esx 42| .01 -.01 .00 -.07 .01 .19 -.4 .17 .06 | -51.9 -2.3 13.13 iac n/a| .00 -.00 -.01 -.30 -.08 .10 .4 .05 .05 | 609.1 -2.1 14.03 Table 2.1406.4 GPS week: 1406 Day: 4 MJD: 54090 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50|-.00 .01 -.01 .13 .01 .08 -.1 .04 .03 | .0 .3 4.10 cod 172|-.01 -.01 .01 .13 -.22 .09 .0 .05 .04 | --- --- --- esx 42| .00 .00 .00 .07 .17 -.19 -.1 .19 .07 | -28.5 -5.1 10.84 iac n/a| .01 -.00 -.00 -.25 .17 -.13 .1 .04 .04 | 599.2 .7 10.57 Table 2.1406.5 GPS week: 1406 Day: 5 MJD: 54091 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50| .00 -.00 -.01 .15 -.03 .31 .1 .03 .03 | .0 .0 5.45 cod 172|-.00 .00 .01 .02 -.04 -.21 -.1 .04 .04 | --- --- --- esx 42|-.00 -.01 -.00 .30 .22 -.11 -.2 .17 .08 | 66.7 -32.0 12.37 iac n/a|-.00 .00 -.00 -.31 .02 -.17 .1 .04 .04 | 701.6 -6.4 12.52 Table 2.1406.6 GPS week: 1406 Day: 6 MJD: 54092 CENT STA| DX DY DZ RX RY RZ SCL RMS WRMS | TOFT TDRFT RMS --------+------------------------------------------------+--------------------- bkg 50| .01 .00 -.00 .05 -.01 .01 -.0 .03 .04 | .0 -.5 3.54 cod 172|-.01 -.00 .02 .03 -.04 -.05 -.1 .04 .04 | --- --- --- esx 42| .00 .00 .01 .21 -.02 .10 -.3 .16 .08 | -18.1 -3.3 8.96 iac n/a|-.00 -.00 -.01 -.24 .01 .04 .1 .03 .03 | 678.8 7.7 9.10 Table 3: Daily fit for each satellite and each centre resulting from weighted average combination and from long arc orbit dynamics (7-day). The first IGL column gives resulting satellite accuracy measures found in SP3 header. The last IGL column gives the RMS fit of the IGL orbit when processed through the 7-day arc evaluation. "E" stands for eclipsing satellites (earth). "M" stands for eclipsing satellites (moon). "X" stands for excluded from the statistics but included in IGL orbit. "T" stands for Total long arc orbit RMS for all satellites. "NE" stands for long arc orbit RMS for Non-Eclipsing satellites only. "MEDI" stands for median of the centre's satellite RMS. "MD" Units: cm. Table 3.1406.0 GPS week: 1406 Day: 0 MJD: 54086 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 | 179 3 3 4 5 2 | 5 5 5 4 4 R02 | 223 4 4 7 3 3 | 4 6 9 5 5 XR03 |---- --- 2 --- --- 0 | --- 60 --- --- 60 XR04 |---- 17 19 --- 48 18 | 16 35 --- 55 13 R06 | 968 6 3 10 3 3 | 4 5 8 4 4 R07 | 299 2 6 6 5 3 | 4 7 5 4 4 R08 | 406 2 7 5 5 3 | 10 13 13 8 10 R18 | 340 4 2 10 2 3 | 43 42 43 42 42 XR19 | 329 1 2 --- 2 1 | 6 6 --- 6 5 XR21 | 401 6 3 --- 4 3 | 6 5 --- 8 4 R22 | 313 2 3 34 3 2 | 4 6 28 8 6 R23 | 436 8 6 57 10 6 | 4 12 99 6 6 R24 | 275 3 3 26 5 3 | 6 7 31 8 7 ------+--------------------------+---------------------- RMS | 441 4 4 24 5 |T 9 16 27 13 13 WRMS | 441 5 5 8 5 |NE 9 16 27 13 13 MEDI | 329 3 3 10 4 |MD 5 7 13 6 6 Table 3.1406.1 GPS week: 1406 Day: 1 MJD: 54087 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 | 285 2 3 4 3 2 | 4 5 7 4 4 R02 | 247 2 4 4 4 2 | 4 7 8 4 5 XR03 |---- --- 2 --- --- 0 | --- 25 --- --- 25 R04 |---- 18 24 18 225 14 | 27 32 8 97 13 R06 | 379 7 6 10 5 4 | 5 12 7 5 5 R07 | 626 1 3 4 3 2 | 3 6 6 3 3 R08 | 667 2 5 5 5 2 | 6 8 11 8 7 R18 | 279 2 4 9 3 3 | 33 32 37 32 33 R19 | 627 4 4 7 5 3 | 5 5 9 5 3 R21 | 592 2 3 8 7 3 | 5 4 7 7 4 R22 | 313 6 3 8 7 3 | 5 4 11 4 5 R23 | 449 5 8 46 4 4 | 5 9 99 8 6 R24 | 233 3 4 46 4 3 | 3 6 32 5 4 ------+--------------------------+---------------------- RMS | 457 6 8 20 65 |T 9 12 20 15 9 WRMS | 457 4 3 7 65 |NE 9 12 20 15 9 MEDI | 379 2 4 8 4 |MD 5 7 8 5 5 Table 3.1406.2 GPS week: 1406 Day: 2 MJD: 54088 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 | 744 4 4 7 5 3 | 4 5 6 4 3 R02 | 439 2 2 3 4 2 | 3 4 4 6 4 XR03 |---- --- 2 --- --- 0 | --- 31 --- --- 31 XR04 |---- 81 105 --- 356 92 | 48 94 --- 99 21 R06 | 312 6 12 7 5 5 | 5 14 9 4 5 R07 | 820 1 3 3 2 1 | 3 4 3 3 3 R08 |1126 2 3 7 7 3 | 6 7 13 8 7 R18 | 539 3 4 15 4 4 | 27 27 31 28 28 R19 | 995 4 3 8 5 3 | 5 5 7 6 4 R21 | 242 3 4 15 9 4 | 4 4 10 11 4 R22 | 348 6 2 3 9 3 | 3 4 5 5 3 R23 | 862 11 15 27 11 9 | 4 10 99 5 4 XR24 | 305 3 3 --- 6 3 | 5 5 --- 11 6 ------+--------------------------+---------------------- RMS | 706 5 7 12 7 |T 10 16 19 16 9 WRMS | 706 6 4 5 7 |NE 10 16 19 16 9 MEDI | 539 3 3 7 5 |MD 4 5 7 6 4 Table 3.1406.3 GPS week: 1406 Day: 3 MJD: 54089 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 |1169 2 3 4 4 2 | 4 6 4 5 4 R02 | 690 3 3 5 5 2 | 5 8 9 9 7 XR03 |---- --- 2 --- --- 0 | --- 34 --- --- 35 XR04 |1475 20 29 --- 30 19 | 14 39 --- 77 13 R06 |1121 3 5 5 3 2 | 5 6 6 5 3 R07 | 734 3 4 4 3 2 | 4 6 6 5 4 R08 |1139 4 4 7 7 3 | 4 5 5 9 4 R18 | 561 4 4 5 4 3 | 13 14 15 16 14 R19 |1056 5 4 4 5 3 | 6 9 6 12 7 R21 | 254 3 4 9 4 3 | 8 7 7 7 6 R22 | 190 6 4 11 6 4 | 5 5 14 5 5 R23 | 777 17 23 27 10 11 | 7 22 99 3 14 R24 | 265 2 4 47 3 2 | 7 9 42 5 6 ------+--------------------------+---------------------- RMS | 806 6 8 17 5 |T 7 13 19 13 9 WRMS | 806 5 4 6 5 |NE 7 13 19 13 9 MEDI | 734 3 4 5 4 |MD 5 8 7 5 6 Table 3.1406.4 GPS week: 1406 Day: 4 MJD: 54090 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 |1440 3 3 3 3 2 | 4 6 6 4 4 R02 |1020 2 3 6 4 2 | 4 5 4 4 3 XR03 |---- --- 2 --- --- 0 | --- 24 --- --- 22 R04 | 771 3 5 8 4 3 | 17 21 7 31 7 R06 |1623 3 7 7 6 3 | 4 8 7 5 4 R07 | 316 3 3 3 3 2 | 3 5 3 4 3 R08 | 644 3 3 7 4 2 | 7 8 6 7 6 R18 | 425 2 4 17 7 4 | 28 28 30 27 27 R19 | 790 7 8 8 3 4 | 6 10 9 4 4 R21 | 351 4 5 25 3 5 | 5 5 19 6 4 R22 | 474 3 4 14 4 3 | 4 4 15 5 3 R24 | 313 4 4 51 2 2 | 5 8 42 6 6 ------+--------------------------+---------------------- RMS | 859 4 5 19 4 |T 8 11 21 9 8 WRMS | 859 3 4 7 4 |NE 8 11 21 9 8 MEDI | 644 3 4 8 4 |MD 5 8 7 5 4 Table 3.1406.5 GPS week: 1406 Day: 5 MJD: 54091 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 | 907 3 4 6 3 2 | 5 4 6 4 3 R02 | 866 3 4 5 3 2 | 4 6 6 7 5 XR03 |---- --- 11 30 --- 18 | --- 15 1 --- 13 R04 | 584 2 5 10 3 3 | 8 11 7 40 5 R06 | 830 3 4 7 4 2 | 5 5 4 5 4 R07 | 477 3 3 6 4 2 | 3 3 5 3 2 R08 | 584 4 6 4 3 3 | 8 11 11 8 8 R18 | 658 4 2 16 5 4 | 33 29 34 30 31 R19 | 468 2 5 13 8 4 | 5 8 9 8 3 R21 | 466 3 3 20 3 4 | 4 3 12 6 4 R22 | 669 3 3 8 4 2 | 3 6 4 7 4 R24 | 327 3 3 43 3 2 | 3 5 27 4 4 ------+--------------------------+---------------------- RMS | 646 3 4 17 4 |T 7 9 11 11 7 WRMS | 646 3 4 8 4 |NE 7 9 11 11 7 MEDI | 584 3 4 8 3 |MD 5 6 6 7 4 Table 3.1406.6 GPS week: 1406 Day: 6 MJD: 54092 Weighted Average Orbit Dynamics (7 days) PRN | brd bkg cod esx iac IGL | bkg cod esx iac IGL ------+--------------------------+---------------------- R01 | 389 2 4 3 4 2 | 5 6 5 4 4 R02 | 950 3 5 2 3 2 | 3 4 5 5 4 XR03 |---- --- 1 --- --- 0 | --- 34 --- --- 34 R04 | 705 1 3 9 4 3 | 7 13 8 33 4 R06 | 653 7 5 10 5 4 | 4 7 6 4 3 R07 | 354 2 5 5 3 2 | 3 5 5 3 3 R08 | 436 3 5 4 2 2 | 6 10 8 9 8 R18 | 646 5 3 13 3 3 | 41 39 45 40 41 R19 | 247 2 5 6 4 2 | 6 8 10 7 6 R21 | 566 2 6 16 4 4 | 5 6 14 6 5 R22 | 528 3 3 5 3 2 | 6 6 8 4 4 R24 | 251 2 3 47 2 2 | 5 8 46 6 6 ------+--------------------------+---------------------- RMS | 559 3 4 16 3 |T 8 12 15 11 10 WRMS | 559 4 4 8 3 |NE 8 12 15 11 10 MEDI | 528 2 4 6 3 |MD 5 7 8 6 4