| Date: | 2004-08-17 07:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4207: Delft QL Report August 17, 2004 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2004-08-17 07:15:00 UTC Message No. 4207 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report August 17, 2004 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS August 17, 2004 This is a weekly report, presenting the results of a continuing analysis of the most recent global LAGEOS-1 and LAGEOS-2 quick-look laser ranging data. The report consists of (A) a pass summary, (B) an overview of the analysis results, detailed statistics of the analysed measurements, and an accumulative pass overview and (C) the earth rotation parameter solutions submitted to IERS. The report is based on all quick-look data as received until Mon, Aug 16, 2004. Questions and comments should be addressed to: R. Noomen Delft University of Technology Faculty of Aerospace Engineering Delft Institute for Earth-Oriented Space Research Kluyverweg 1 2629 HS Delft The Netherlands Telephone: +31-15-2785377 Telefax : +31-15-2785322 E-mail : ron.noomen@deos.tudelft.nl A. PASS SUMMARY The table below gives an overview of the ranging data both on LAGEOS-1 and LAGEOS-2, as received by the Quick-Look Data Analysis Center (QLDAC) on Mon, Aug 16, 2004. All data were obtained through the NASA Crustal Dynamics Data Information system (CDDIS) and the Eurolas Data Center (EDC) in Germany. The data are unscreened and may span more than a week due to late reporting by the stations. ------------------------------------------------------------------------------ Station System/Location Period No. of Passes ID LAGEOS-1 LAGEOS-2 ------------------------------------------------------------------------------ 1824 Kiev, Ukraine 040815 - 040815 1 - 1831 Lviv, Ukraine 040812 - 040815 2 - 1864 Maidanak, Uzbekistan (site 2) 040808 - 040811 4 3 1873 Simeiz, Crimea, Ukraine 040809 - 040814 5 5 1884 Riga, Latvia 040809 - 040813 5 3 1893 Kazivili, Crimea, Ukraine 040812 - 040814 1 2 6405 Concepcion, Chile (TIGO 847) 040218 - 040730 6 4 6810 Zimmerwald 846, Switzerland 040809 - 040816 11 10 7080 McDonald Obs., Fort Davis, TX 040811 - 040813 2 1 7090 Yarragadee, Australia 040809 - 040816 12 9 7105 Greenbelt, Maryland 040810 - 040812 2 3 7124 Papeete, Tahiti 040810 - 040814 4 - 7231 Wuhan, China (new) 040809 - 040809 - 1 7237 Changchun, China 040809 - 040815 7 9 7355 Urumqi, China (TROS) 040814 - 040815 2 3 7405 Concepcion, Chile (TIGO 424) 040306 - 040710 1 1 7501 Hartebeesthoek, SA (MOB-6) 040810 - 040816 - 14 7806 Metsahovi, Finland 040814 - 040814 1 1 7810 Zimmerwald 423, Switzerland 040809 - 040816 12 11 7811 Borowiec, Poland 040809 - 040814 3 7 7824 San Fernando, Spain 040810 - 040813 4 - 7825 Mount Stromlo, Australia 040807 - 040810 5 5 7832 Riyad, Saudi Arabia 040809 - 040816 11 16 7835 Grasse, France 040729 - 040809 4 3 7837 Shanghai Observatory, China 040807 - 040815 7 10 7838 Simosato Observatory, Japan 040809 - 040812 6 6 7839 Graz, Austria 040809 - 040816 19 8 7840 Herstmonceux, United Kingdom 040810 - 040815 8 3 7841 Potsdam, Germany 040814 - 040816 2 2 7845 Grasse, France (LLR) 040809 - 040813 4 2 8834 Wettzell, Germany 040809 - 040816 13 10 ------ ------ --- --- TOTAL 040218 - 040816 164 152 ------------------------------------------------------------------------------ B. ANALYSIS RESULTS The analysis is based on two orbit solutions using global quick-look normal points that cover a period of 8 days which are computed simultaneously. This week´s data interval runs from Sat, Aug 7, 2004 to Sun, Aug 15, 2004. The measurement and dynamic models used in this analysis are close to the IERS Standard. The overall model is referred to as QLDACMOD11. The details of this model can be obtained on request. The terrestrial reference frame is provided by the ITRF2000 station coordinates solution (extended with coordinates of new stations, where necessary). The general statistics and results of this week´s analysis are thus: ----------------------------------------------------------------------- Satellite LAGEOS-1 LAGEOS-2 Number of Stations 27 25 Number of Passes 182/180 178/174 Number of Normal Points 1872/1812 1992/1942 Weighted RMS of Fit (mm) 13 12 ----------------------------------------------------------------------- Residual statistics per station. The header line for each station shows the station id, its name, whether the position is solved for or not and the measurement accuracy in mm. Rejected observations are not used for the calculation of the rms-of-fit, the biases or the scatter. The latter holds w.r.t. the residual trend line described by the bias estimates. Uncertainties are 3-sigma values. -------------------------------------------------------------------------------- Date Time Sat. Obs. RMS Range Bias Time Bias Scatter tot/rej (mm) (mm) (us) (mm) -------------------------------------------------------------------------------- Station 1831 (Lviv) (position fixed, acc. 400 mm) 1831 12 Aug 04 22:14 LAG1 6 0 874 -926 +- 545 193 +- 747 9*CHK* Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 7 Aug 04 18:09 LAG1 6 0 36 -33 +- 246 6 +- 193 15 1864 7 Aug 04 21:15 LAG2 6 0 52 -39 +- 259 14 +- 181 14 1864 8 Aug 04 20:15 LAG1 4 0 50 -84 +-1803 -25 +-1246 11 1864 8 Aug 04 23:29 LAG2 7 0 50 -4 +- 575 31 +- 394 7 1864 9 Aug 04 18:45 LAG1 8 0 55 -22 +- 409 16 +- 217 21 1864 10 Aug 04 17:25 LAG1 7 0 37 -27 +- 365 3 +- 208 18 1864 10 Aug 04 19:31 LAG2 2 0 64 -440 +-9999 -183 +-6575 0 1864 11 Aug 04 17:57 LAG2 7 0 18 -28 +- 404 9 +- 244 5 1864 11 Aug 04 19:31 LAG1 5 0 39 -42 +- 309 5 +- 141 10 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 8 Aug 04 19:19 LAG2 6 0 220 265 +- 438 80 +- 617 11 1873 8 Aug 04 20:27 LAG1 4 0 219 245 +-1477 18 +-1056 9 1873 9 Aug 04 19:22 LAG1 4 0 552 1271 +-1187 -426 +- 640 87*CHK* 1873 9 Aug 04 22:36 LAG1 6 0 192 194 +- 273 -13 +- 232 39 1873 11 Aug 04 21:31 LAG2 4 1 566 -848 +-2123 -835 +-1280 37 1873 12 Aug 04 19:47 LAG2 5 0 370 258 +- 483 -178 +- 714 63 1873 12 Aug 04 22:03 LAG1 6 0 267 330 +- 601 64 +- 536 19 1873 12 Aug 04 23:49 LAG2 5 0 356 479 +- 880 127 +- 843 31 1873 13 Aug 04 17:59 LAG2 12 0 174 155 +- 239 12 +- 243 58 1873 13 Aug 04 20:53 LAG1 7 0 578 968 +- 533 -350 +- 387 93*CHK* 1873 14 Aug 04 19:27 LAG1 4 0 246 263 +- 349 -66 +- 614 7 1873 14 Aug 04 20:16 LAG2 6 0 259 360 +-1273 -63 +- 760 30 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 9 Aug 04 19:27 LAG1 7 0 7 -14 +- 326 5 +- 199 3 1884 9 Aug 04 21:35 LAG2 13 0 14 -7 +- 137 14 +- 104 5 1884 9 Aug 04 22:43 LAG1 16 0 21 19 +- 75 -1 +- 61 7 1884 10 Aug 04 21:27 LAG1 6 0 41 -26 +- 153 -15 +- 127 6 1884 10 Aug 04 23:34 LAG2 10 0 16 -16 +- 95 -2 +- 124 3 1884 12 Aug 04 18:35 LAG1 4 0 53 -15 +- 731 19 +- 383 11 1884 12 Aug 04 22:07 LAG1 18 0 18 -16 +- 70 2 +- 49 6 1884 12 Aug 04 23:41 LAG2 16 0 24 -25 +- 77 -3 +- 66 5 Station 1893 (Kazivili) (position fixed, acc. 100 mm) 1893 8 Aug 04 20:33 LAG1 3 0 40 48 +- 462 17 +- 791 8 1893 12 Aug 04 19:51 LAG2 2 0 12 34 +-1258 114 +-3138 0 1893 12 Aug 04 22:07 LAG1 6 0 11 3 +- 160 19 +- 252 3 1893 14 Aug 04 20:05 LAG2 7 0 14 11 +- 149 -1 +- 184 9 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 7 Aug 04 11:25 LAG1 17 0 6 -1 +- 45 3 +- 31 2 6810 7 Aug 04 14:55 LAG1 14 0 15 -14 +- 62 0 +- 37 2 6810 7 Aug 04 18:27 LAG1 14 0 5 -1 +- 49 1 +- 40 4 6810 7 Aug 04 21:01 LAG2 16 0 23 -23 +- 47 0 +- 33 1 6810 7 Aug 04 21:45 LAG1 15 0 14 -8 +- 49 -6 +- 24 6 6810 8 Aug 04 00:51 LAG2 22 0 15 -16 +- 42 -2 +- 28 2 6810 8 Aug 04 01:27 LAG1 12 0 10 -5 +- 52 -8 +- 54 4 6810 8 Aug 04 09:09 LAG2 11 0 14 -13 +- 59 1 +- 84 2 6810 8 Aug 04 10:03 LAG1 16 0 10 -10 +- 45 0 +- 47 2 6810 8 Aug 04 13:32 LAG1 14 0 14 -17 +- 78 -2 +- 42 2 6810 8 Aug 04 17:03 LAG1 18 0 17 -16 +- 43 1 +- 29 2 6810 8 Aug 04 19:13 LAG2 12 0 16 -12 +- 54 10 +- 85 4 6810 8 Aug 04 20:25 LAG1 13 0 7 -3 +- 53 -1 +- 28 6 6810 9 Aug 04 03:05 LAG2 26 0 18 -16 +- 36 -3 +- 23 3 6810 9 Aug 04 21:19 LAG2 9 0 23 -25 +- 66 4 +- 42 4 6810 9 Aug 04 22:37 LAG1 9 0 5 -1 +- 76 1 +- 41 4 6810 10 Aug 04 01:19 LAG2 4 0 17 -3 +- 564 12 +- 460 1 6810 10 Aug 04 05:13 LAG2 17 0 7 5 +- 46 0 +- 33 6 6810 11 Aug 04 13:09 LAG1 4 0 8 -1 +- 136 -6 +- 95 3 6810 11 Aug 04 16:29 LAG1 13 0 8 1 +- 62 -4 +- 39 1 6810 11 Aug 04 19:52 LAG1 17 0 20 15 +- 46 -4 +- 28 5 6810 11 Aug 04 21:16 LAG2 11 0 24 -9 +- 88 10 +- 59 3 6810 11 Aug 04 23:25 LAG1 9 0 7 -2 +- 61 -1 +- 32 5 6810 12 Aug 04 01:23 LAG2 18 0 8 0 +- 43 4 +- 26 3 6810 12 Aug 04 05:29 LAG2 24 0 13 9 +- 37 -4 +- 24 5 6810 14 Aug 04 23:05 LAG1 15 0 11 -6 +- 72 -3 +- 42 3 6810 14 Aug 04 23:37 LAG2 9 0 6 -8 +- 183 -2 +- 95 4 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 11 Aug 04 15:34 LAG2 6 0 11 36 +- 236 -23 +- 122 4 7080 11 Aug 04 20:45 LAG1 6 0 17 9 +- 52 -6 +- 39 1 7080 13 Aug 04 18:25 LAG1 3 0 4 0 +- 385 -2 +- 244 1 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 7 Aug 04 01:17 LAG1 8 0 9 -6 +- 18 5 +- 23 1 7090 7 Aug 04 04:47 LAG2 6 0 16 -21 +- 71 4 +- 53 2 7090 7 Aug 04 05:01 LAG1 2 0 38 -63 +- 471 20 +- 391 0 7090 7 Aug 04 08:35 LAG2 23 0 4 1 +- 8 -1 +- 6 3 7090 7 Aug 04 12:41 LAG2 25 0 11 1 +- 8 -6 +- 5 1 7090 7 Aug 04 17:11 LAG1 23 0 9 -9 +- 9 0 +- 4 2 7090 7 Aug 04 20:43 LAG1 15 0 5 2 +- 11 -4 +- 10 2 7090 8 Aug 04 03:33 LAG1 8 0 22 -37 +- 26 12 +- 14 2 7090 8 Aug 04 06:44 LAG2 8 0 14 -13 +- 15 2 +- 12 3 7090 8 Aug 04 10:47 LAG2 22 0 5 -3 +- 8 2 +- 4 0 7090 8 Aug 04 15:05 LAG2 9 0 5 -3 +- 20 -2 +- 26 2 7090 8 Aug 04 15:43 LAG1 24 0 7 -7 +- 8 0 +- 4 2 7090 8 Aug 04 19:31 LAG1 14 0 4 3 +- 15 -4 +- 10 1 7090 9 Aug 04 00:49 LAG2 12 0 7 -7 +- 17 7 +- 15 4 7090 9 Aug 04 02:16 LAG1 5 0 10 -28 +- 62 16 +- 46 1 7090 9 Aug 04 04:51 LAG2 4 0 20 -23 +- 28 -13 +- 80 1 7090 9 Aug 04 21:29 LAG1 11 0 15 -13 +- 12 -8 +- 16 1 7090 10 Aug 04 00:45 LAG1 7 0 7 -7 +- 21 -3 +- 30 5 7090 10 Aug 04 04:31 LAG1 7 0 17 -88 +- 106 32 +- 45 3 7090 10 Aug 04 10:59 LAG2 28 0 10 -6 +- 7 -3 +- 4 2 7090 10 Aug 04 16:33 LAG1 24 0 6 -6 +- 8 0 +- 4 2 7090 10 Aug 04 20:07 LAG1 17 0 6 5 +- 10 -1 +- 8 2 7090 11 Aug 04 15:39 LAG1 8 0 22 -19 +- 58 -1 +- 34 0 7090 12 Aug 04 07:15 LAG2 14 0 15 -14 +- 11 0 +- 10 3 7090 12 Aug 04 11:15 LAG2 17 0 11 -8 +- 10 -1 +- 4 5 7090 14 Aug 04 11:31 LAG2 24 0 3 1 +- 8 0 +- 4 2 7090 14 Aug 04 14:37 LAG1 14 0 4 -5 +- 16 -1 +- 13 1 7090 14 Aug 04 18:07 LAG1 24 0 4 1 +- 8 -1 +- 4 1 7090 14 Aug 04 21:45 LAG1 9 0 8 -5 +- 15 -7 +- 23 1 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 9 Aug 04 00:31 LAG1 7 0 9 7 +- 21 -4 +- 28 1 7105 9 Aug 04 02:29 LAG2 10 0 9 0 +- 38 6 +- 24 1 7105 9 Aug 04 03:49 LAG1 7 0 5 16 +- 57 9 +- 31 1 7105 9 Aug 04 06:41 LAG2 13 0 16 1 +- 11 -10 +- 7 2 7105 9 Aug 04 07:33 LAG1 3 0 14 31 +- 147 71 +- 235 3 7105 10 Aug 04 04:51 LAG2 18 0 4 2 +- 13 -1 +- 8 3 7105 10 Aug 04 06:19 LAG1 3 0 0 0 +- 103 0 +- 165 0 7105 11 Aug 04 01:29 LAG1 7 0 8 5 +- 45 -9 +- 32 3 7105 11 Aug 04 02:45 LAG2 8 0 9 -3 +- 16 -2 +- 8 8 7105 12 Aug 04 01:15 LAG2 5 1 14 0 +- 75 23 +- 120 2 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 10 Aug 04 09:17 LAG1 9 0 40 43 +- 15 8 +- 13 3 7124 10 Aug 04 12:53 LAG1 4 0 12 -21 +- 85 -9 +- 81 1 7124 13 Aug 04 08:53 LAG1 7 0 43 46 +- 17 16 +- 30 1 7124 14 Aug 04 10:57 LAG1 4 0 9 -2 +- 142 3 +- 81 0 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 8 Aug 04 15:47 LAG2 4 0 53192 -15 +- 122 -99999 +- 280 6*CHK* 7231 8 Aug 04 16:24 LAG1 4 4 0 0 +- 0 0 +- 0 0 7231 8 Aug 04 19:51 LAG2 8 0 92756 -42 +- 90 -99999 +- 119 11*CHK* 7231 9 Aug 04 13:43 LAG2 7 0 99999 30 +- 80 -99999 +- 110 15*CHK* Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 8 Aug 04 12:07 LAG2 6 0 49 -60 +- 290 10 +- 232 8 7237 8 Aug 04 12:51 LAG1 9 0 33 -23 +- 62 6 +- 28 4 7237 8 Aug 04 15:42 LAG2 15 0 11 8 +- 39 -2 +- 29 7 7237 9 Aug 04 11:47 LAG1 13 0 25 13 +- 54 9 +- 35 6 7237 9 Aug 04 13:43 LAG2 22 0 9 0 +- 33 -5 +- 22 5 7237 9 Aug 04 15:07 LAG1 9 0 27 9 +- 52 11 +- 27 6 7237 9 Aug 04 18:03 LAG2 10 0 15 15 +- 71 -1 +- 62 6 7237 12 Aug 04 12:35 LAG2 5 0 12 -37 +- 474 17 +- 305 6 7237 12 Aug 04 14:29 LAG1 10 0 24 19 +- 48 7 +- 24 7 7237 12 Aug 04 16:15 LAG2 7 0 13 5 +- 61 -11 +- 54 5 7237 13 Aug 04 13:17 LAG1 13 0 24 18 +- 46 4 +- 32 9 7237 13 Aug 04 14:13 LAG2 17 0 21 16 +- 37 -9 +- 27 6 7237 13 Aug 04 18:40 LAG2 11 0 10 16 +- 99 -11 +- 70 6 7237 14 Aug 04 11:45 LAG1 12 0 32 13 +- 46 15 +- 22 11 7237 14 Aug 04 12:24 LAG2 15 0 6 2 +- 47 1 +- 32 5 7237 14 Aug 04 15:24 LAG1 7 0 20 15 +- 57 11 +- 63 8 7237 14 Aug 04 16:29 LAG2 11 0 12 1 +- 47 -9 +- 39 6 Station 7355 (Urumqi) (position solved, acc. 10 mm) 7355 8 Aug 04 16:41 LAG1 8 2 21 -21 +- 29 -22 +- 28 16 7355 14 Aug 04 15:37 LAG1 9 1 13 -1 +- 15 2 +- 15 13 7355 14 Aug 04 16:07 LAG2 16 1 17 -3 +- 11 -6 +- 9 16 7355 14 Aug 04 20:35 LAG2 11 0 37 -29 +- 31 40 +- 22 20 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 7 Aug 04 16:13 LAG2 16 0 14 12 +- 10 4 +- 4 1 7501 7 Aug 04 20:25 LAG2 12 0 9 7 +- 12 2 +- 12 2 7501 8 Aug 04 14:35 LAG2 6 0 19 18 +- 17 9 +- 49 3 7501 8 Aug 04 18:25 LAG2 19 0 12 1 +- 10 8 +- 6 1 7501 10 Aug 04 06:19 LAG2 12 0 8 -7 +- 12 1 +- 16 3 7501 10 Aug 04 10:19 LAG2 8 0 2 1 +- 17 1 +- 16 2 7501 10 Aug 04 15:07 LAG2 5 0 13 17 +- 163 -2 +- 99 1 7501 10 Aug 04 18:41 LAG2 14 0 7 6 +- 12 4 +- 9 2 7501 11 Aug 04 12:53 LAG2 5 0 6 -3 +- 40 12 +- 78 5 7501 11 Aug 04 16:47 LAG2 12 0 11 12 +- 13 3 +- 7 1 7501 12 Aug 04 06:41 LAG2 6 0 3 0 +- 23 2 +- 32 2 7501 12 Aug 04 10:47 LAG2 3 0 3 2 +- 24 11 +- 170 0 7501 12 Aug 04 14:55 LAG2 6 0 21 14 +- 17 8 +- 12 2 7501 12 Aug 04 19:00 LAG2 5 0 12 2 +- 60 -8 +- 57 4 7501 13 Aug 04 08:41 LAG2 7 0 5 1 +- 16 3 +- 12 1 7501 13 Aug 04 13:11 LAG2 3 0 15 3 +- 86 25 +- 187 1 Station 7806 (Metsahovi) (position fixed, acc. 30 mm) 7806 14 Aug 04 20:02 LAG2 7 0 20 -22 +- 62 -3 +- 78 3 7806 14 Aug 04 23:17 LAG1 11 0 11 -19 +- 61 8 +- 44 3 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 7 Aug 04 11:25 LAG1 16 0 6 -3 +- 48 2 +- 35 3 7810 7 Aug 04 14:55 LAG1 12 0 11 -8 +- 71 1 +- 45 5 7810 7 Aug 04 18:27 LAG1 13 0 5 -3 +- 51 1 +- 44 3 7810 7 Aug 04 21:01 LAG2 15 0 23 -22 +- 47 0 +- 36 2 7810 7 Aug 04 21:45 LAG1 16 0 17 -9 +- 46 -7 +- 22 6 7810 8 Aug 04 00:59 LAG2 17 0 13 -13 +- 45 -3 +- 38 1 7810 8 Aug 04 01:27 LAG1 13 0 11 -4 +- 50 -8 +- 49 6 7810 8 Aug 04 09:09 LAG2 10 0 15 -14 +- 69 -3 +- 100 7 7810 8 Aug 04 10:03 LAG1 14 0 10 -9 +- 49 0 +- 53 3 7810 8 Aug 04 13:32 LAG1 13 0 10 -12 +- 93 -2 +- 49 2 7810 8 Aug 04 17:03 LAG1 17 0 14 -14 +- 46 0 +- 31 3 7810 8 Aug 04 19:13 LAG2 7 0 15 -10 +- 87 8 +- 134 5 7810 8 Aug 04 20:25 LAG1 12 0 5 -2 +- 54 -2 +- 29 3 7810 9 Aug 04 03:05 LAG2 21 0 14 -11 +- 42 -4 +- 29 2 7810 9 Aug 04 21:05 LAG2 14 0 18 -15 +- 49 6 +- 27 5 7810 9 Aug 04 22:31 LAG1 10 0 4 1 +- 103 0 +- 48 4 7810 10 Aug 04 01:19 LAG2 3 0 11 -22 +- 777 -8 +- 597 0 7810 10 Aug 04 05:22 LAG2 5 0 9 8 +- 88 -1 +- 73 0 7810 10 Aug 04 10:59 LAG1 3 0 7 -10 +- 161 -9 +- 197 1 7810 11 Aug 04 08:03 LAG2 3 0 29 19 +-2424 -26 +-1325 1 7810 11 Aug 04 13:09 LAG1 5 0 9 -8 +- 98 -8 +- 75 2 7810 11 Aug 04 16:31 LAG1 13 0 8 1 +- 55 -5 +- 38 1 7810 11 Aug 04 19:52 LAG1 16 0 17 13 +- 51 -3 +- 33 2 7810 11 Aug 04 21:16 LAG2 9 0 29 -19 +- 118 6 +- 72 2 7810 11 Aug 04 23:23 LAG1 11 0 10 -7 +- 55 -2 +- 26 4 7810 12 Aug 04 01:23 LAG2 18 0 7 -4 +- 43 2 +- 25 4 7810 12 Aug 04 05:28 LAG2 24 0 9 3 +- 37 -4 +- 23 4 7810 14 Aug 04 23:05 LAG1 14 0 11 -8 +- 72 -2 +- 45 2 7810 14 Aug 04 23:37 LAG2 8 0 6 -16 +- 189 -8 +- 97 3 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 9 Aug 04 21:21 LAG2 13 0 10 0 +- 50 6 +- 44 8 7811 9 Aug 04 22:43 LAG1 15 0 17 16 +- 47 0 +- 37 6 7811 10 Aug 04 01:19 LAG2 11 0 7 2 +- 63 3 +- 47 6 7811 10 Aug 04 21:19 LAG1 16 0 23 20 +- 45 -5 +- 30 6 7811 10 Aug 04 23:26 LAG2 16 0 19 18 +- 46 2 +- 37 5 7811 11 Aug 04 23:30 LAG1 17 0 12 10 +- 44 -1 +- 35 7 7811 12 Aug 04 01:35 LAG2 13 0 16 16 +- 54 5 +- 50 5 7811 12 Aug 04 19:46 LAG2 8 0 11 -4 +- 64 10 +- 100 8 7811 13 Aug 04 21:44 LAG2 15 0 11 0 +- 47 7 +- 38 6 7811 14 Aug 04 01:47 LAG2 14 0 21 23 +- 57 6 +- 50 6 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 10 Aug 04 21:25 LAG1 15 0 57 63 +- 36 -13 +- 26 7 7824 11 Aug 04 01:05 LAG1 11 0 54 73 +- 89 -13 +- 53 3 7824 12 Aug 04 22:09 LAG1 9 0 54 54 +- 41 -1 +- 32 4 7824 13 Aug 04 02:10 LAG1 4 0 43 239 +-2661 -100 +-1353 1 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 7 Aug 04 01:17 LAG1 7 0 10 0 +- 25 -7 +- 19 5 7825 7 Aug 04 05:03 LAG2 8 0 6 -8 +- 26 5 +- 23 3 7825 7 Aug 04 09:07 LAG2 7 0 3 3 +- 15 0 +- 27 2 7825 8 Aug 04 07:10 LAG2 15 0 3 0 +- 14 0 +- 10 3 7825 8 Aug 04 22:33 LAG1 4 0 28 28 +- 21 -2 +- 27 3 7825 9 Aug 04 00:49 LAG2 3 0 60 -170 +- 415 -118 +- 217 22 7825 9 Aug 04 02:13 LAG1 8 0 11 -20 +- 64 10 +- 30 10 7825 10 Aug 04 00:51 LAG1 3 0 13 14 +- 146 -17 +- 95 3 7825 10 Aug 04 07:11 LAG2 7 0 5 0 +- 28 -3 +- 19 3 7825 10 Aug 04 23:13 LAG1 6 0 10 -19 +- 42 -18 +- 36 5 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 7 Aug 04 08:07 LAG1 8 0 13 3 +- 23 13 +- 26 2 7832 7 Aug 04 17:01 LAG2 12 0 4 -2 +- 21 -4 +- 24 3 7832 7 Aug 04 18:14 LAG1 7 0 13 12 +- 29 3 +- 44 2 7832 7 Aug 04 21:07 LAG2 11 0 5 -5 +- 20 -3 +- 29 2 7832 7 Aug 04 21:39 LAG1 8 0 5 4 +- 23 0 +- 31 2 7832 8 Aug 04 01:21 LAG2 9 0 7 -22 +- 83 -14 +- 66 2 7832 8 Aug 04 05:29 LAG2 6 0 29 18 +- 78 -6 +- 44 4 7832 8 Aug 04 16:57 LAG1 4 0 9 -6 +- 44 12 +- 151 0 7832 8 Aug 04 19:07 LAG2 9 0 15 -14 +- 22 2 +- 19 3 7832 8 Aug 04 20:27 LAG1 7 0 3 5 +- 65 -2 +- 43 2 7832 8 Aug 04 23:27 LAG2 11 0 23 -23 +- 20 -2 +- 41 0 7832 9 Aug 04 03:41 LAG2 14 0 4 -1 +- 18 -2 +- 12 3 7832 9 Aug 04 18:57 LAG1 7 0 24 25 +- 26 4 +- 39 2 7832 9 Aug 04 21:33 LAG2 14 0 10 -17 +- 35 16 +- 28 2 7832 9 Aug 04 22:35 LAG1 11 0 5 0 +- 43 2 +- 31 4 7832 10 Aug 04 01:35 LAG2 11 0 6 -13 +- 58 -6 +- 44 1 7832 10 Aug 04 06:23 LAG2 3 0 18 58 +- 891 -20 +- 463 0 7832 10 Aug 04 07:33 LAG1 13 0 7 0 +- 21 6 +- 20 3 7832 10 Aug 04 15:31 LAG2 7 0 3 1 +- 25 2 +- 79 2 7832 10 Aug 04 17:41 LAG1 8 0 14 11 +- 26 6 +- 38 3 7832 10 Aug 04 19:23 LAG2 5 0 10 -20 +- 110 -10 +- 92 3 7832 10 Aug 04 20:55 LAG1 11 0 8 0 +- 32 -4 +- 21 2 7832 10 Aug 04 23:43 LAG2 11 0 2 -1 +- 20 -1 +- 40 1 7832 11 Aug 04 04:05 LAG2 15 0 2200 2856 +- 25 -1610 +- 16 1077*CHK* 7832 11 Aug 04 13:13 LAG1 4 0 10 0 +- 38 -2 +- 45 10 7832 11 Aug 04 17:21 LAG2 11 0 6 -12 +- 43 -6 +- 29 2 7832 11 Aug 04 19:39 LAG1 7 0 9 -1 +- 50 -8 +- 41 2 7832 14 Aug 04 02:03 LAG2 9 0 15 7 +- 58 -4 +- 35 3 7832 14 Aug 04 16:19 LAG2 3 0 11 21 +- 880 -5 +- 501 0 7832 14 Aug 04 19:51 LAG2 12 0 14 -7 +- 19 -14 +- 23 7 7832 14 Aug 04 22:49 LAG1 10 0 8 0 +- 42 6 +- 38 3 Station 7835 (Grasse) (position fixed, acc. 30 mm) 7835 9 Aug 04 19:09 LAG1 10 0 22 22 +- 31 0 +- 17 3 7835 9 Aug 04 21:15 LAG2 8 0 9 -7 +- 48 2 +- 60 1 7835 9 Aug 04 22:34 LAG1 5 0 13 19 +- 231 2 +- 106 0 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 7 Aug 04 13:47 LAG2 8 0 23 -15 +- 191 -5 +- 122 4 7837 7 Aug 04 14:13 LAG1 10 0 13 -13 +- 79 -1 +- 57 6 7837 7 Aug 04 17:55 LAG2 3 0 72 -289 +- 415 368 +- 616 16 7837 8 Aug 04 12:59 LAG1 12 0 110 110 +- 44 -4 +- 44 10*CHK* 7837 8 Aug 04 15:35 LAG2 17 0 59 53 +- 37 11 +- 27 10 7837 8 Aug 04 16:19 LAG1 18 0 26 23 +- 36 3 +- 24 11 7837 8 Aug 04 20:07 LAG2 8 0 12 -7 +- 74 4 +- 123 10 7837 9 Aug 04 11:39 LAG1 10 0 51 47 +- 58 -2 +- 68 18 7837 9 Aug 04 13:39 LAG2 17 0 18 -11 +- 37 -6 +- 24 7 7837 9 Aug 04 15:03 LAG1 12 0 21 19 +- 44 1 +- 33 9 7837 9 Aug 04 17:59 LAG2 17 0 11 -6 +- 50 12 +- 46 5 7837 10 Aug 04 12:01 LAG2 13 6 2448 2454 +- 83 -11 +- 129 6*CHK* 7837 10 Aug 04 17:13 LAG1 20 12 2454 2454 +- 54 0 +- 73 7*CHK* 7837 10 Aug 04 20:31 LAG2 7 4 2502 2433 +- 660 59 +- 562 2*CHK* 7837 11 Aug 04 12:25 LAG1 11 0 24 -24 +- 47 -11 +- 53 3 7837 11 Aug 04 13:43 LAG2 4 0 60 393 +-1989 140 +- 826 17 7837 11 Aug 04 15:45 LAG1 5 0 19 16 +- 570 -1 +- 256 5 7837 11 Aug 04 18:15 LAG2 8 0 17 -16 +- 54 6 +- 106 4 7837 14 Aug 04 12:11 LAG2 20 0 15 14 +- 34 2 +- 25 4 7837 14 Aug 04 15:11 LAG1 14 0 5 0 +- 40 0 +- 20 5 7837 14 Aug 04 16:31 LAG2 15 0 12 -7 +- 62 -3 +- 53 6 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 8 Aug 04 11:37 LAG2 22 0 12 6 +- 20 -4 +- 15 9 7838 8 Aug 04 12:55 LAG1 17 0 16 12 +- 27 -4 +- 16 11 7838 8 Aug 04 15:35 LAG2 18 0 17 19 +- 27 3 +- 22 3 7838 8 Aug 04 16:23 LAG1 9 0 11 12 +- 48 4 +- 48 6 7838 9 Aug 04 11:29 LAG1 18 0 26 24 +- 22 6 +- 16 5 7838 9 Aug 04 13:35 LAG2 27 0 22 17 +- 18 -4 +- 10 9 7838 9 Aug 04 14:53 LAG1 20 0 23 21 +- 21 2 +- 11 7 7838 9 Aug 04 17:49 LAG2 22 0 26 20 +- 22 17 +- 17 11 7838 10 Aug 04 03:21 LAG1 7 2 20 30 +- 188 6 +- 103 8 7838 10 Aug 04 11:47 LAG2 6 0 31 20 +- 292 -5 +- 156 4 7838 11 Aug 04 14:23 LAG2 10 0 6 21 +- 123 -10 +- 68 4 7838 11 Aug 04 16:01 LAG1 7 0 17 25 +- 58 -19 +- 68 6 7838 11 Aug 04 18:21 LAG2 15 0 27 18 +- 37 4 +- 30 16 7838 12 Aug 04 11:03 LAG1 14 0 51 44 +- 26 -1 +- 23 26 7838 12 Aug 04 11:59 LAG2 25 0 25 24 +- 19 -4 +- 11 5 7838 12 Aug 04 14:25 LAG1 21 0 16 16 +- 22 -3 +- 12 7 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 9 Aug 04 19:23 LAG1 7 0 12 12 +- 29 0 +- 15 2 7839 9 Aug 04 21:47 LAG2 5 0 9 -20 +- 245 14 +- 115 0 7839 9 Aug 04 22:35 LAG1 10 0 4 -2 +- 16 1 +- 9 0 7839 10 Aug 04 01:14 LAG2 12 0 7 -6 +- 12 4 +- 7 0 7839 10 Aug 04 10:49 LAG1 16 0 11 0 +- 10 -8 +- 7 0 7839 10 Aug 04 14:31 LAG1 8 0 11 -12 +- 16 -4 +- 19 1 7839 10 Aug 04 17:49 LAG1 15 0 6 -5 +- 10 1 +- 8 0 7839 10 Aug 04 19:39 LAG2 10 0 6 -11 +- 23 7 +- 17 0 7839 10 Aug 04 21:09 LAG1 8 0 6 -1 +- 15 -2 +- 7 0 7839 10 Aug 04 23:39 LAG2 9 0 1 -1 +- 26 1 +- 16 1 7839 11 Aug 04 00:55 LAG1 10 0 4 4 +- 14 0 +- 17 1 7839 11 Aug 04 09:31 LAG1 2 0 5 -4 +- 608 1 +- 526 0 7839 11 Aug 04 13:07 LAG1 4 0 12 -15 +- 123 -16 +- 73 0 7839 11 Aug 04 16:35 LAG1 10 0 6 2 +- 14 -6 +- 15 0 7839 11 Aug 04 20:05 LAG1 7 0 13 13 +- 16 -6 +- 22 0 7839 12 Aug 04 11:37 LAG1 8 0 7 -5 +- 35 0 +- 20 0 7839 12 Aug 04 15:09 LAG1 12 0 7 -9 +- 17 -2 +- 12 1 7839 12 Aug 04 18:35 LAG1 11 0 5 -2 +- 13 2 +- 8 1 7839 12 Aug 04 19:31 LAG2 10 0 12 -9 +- 15 3 +- 10 1 7839 12 Aug 04 21:55 LAG1 10 0 7 -5 +- 13 2 +- 5 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 7 Aug 04 02:49 LAG2 25 0 11 4 +- 13 5 +- 8 5 7840 7 Aug 04 06:57 LAG2 15 0 6 3 +- 17 -2 +- 12 3 7840 7 Aug 04 11:27 LAG1 7 0 13 11 +- 69 -1 +- 58 1 7840 7 Aug 04 15:07 LAG1 9 0 6 0 +- 22 -4 +- 18 2 7840 7 Aug 04 18:29 LAG1 9 0 7 11 +- 37 3 +- 28 2 7840 7 Aug 04 21:01 LAG2 15 0 12 -10 +- 17 5 +- 15 2 7840 7 Aug 04 21:49 LAG1 10 0 14 -1 +- 22 -5 +- 9 4 7840 8 Aug 04 00:51 LAG2 20 0 5 0 +- 15 2 +- 10 3 7840 8 Aug 04 01:31 LAG1 15 0 4 -2 +- 17 -3 +- 17 2 7840 8 Aug 04 05:01 LAG2 20 0 6 3 +- 14 -2 +- 9 4 7840 8 Aug 04 09:13 LAG2 8 0 9 -7 +- 24 -6 +- 53 3 7840 8 Aug 04 13:35 LAG1 11 0 5 -3 +- 42 -4 +- 23 2 7840 10 Aug 04 14:25 LAG1 13 0 8 -6 +- 24 -6 +- 15 3 7840 10 Aug 04 17:55 LAG1 14 0 5 2 +- 18 0 +- 14 5 7840 10 Aug 04 21:35 LAG1 13 0 10 14 +- 33 -10 +- 18 3 7840 12 Aug 04 11:53 LAG1 2 0 2 6 +- 302 18 +- 696 0 7840 12 Aug 04 18:43 LAG1 16 0 9 6 +- 16 3 +- 11 4 7840 12 Aug 04 22:17 LAG1 16 0 4 3 +- 20 0 +- 12 2 7840 12 Aug 04 23:45 LAG2 5 0 4 4 +- 35 0 +- 29 1 7840 13 Aug 04 07:37 LAG2 12 0 9 1 +- 20 -9 +- 23 2 7840 14 Aug 04 16:03 LAG1 15 0 6 0 +- 17 -4 +- 12 1 7840 14 Aug 04 23:03 LAG1 14 0 3 2 +- 18 0 +- 13 1 7840 14 Aug 04 23:39 LAG2 8 0 2 -3 +- 52 -2 +- 33 2 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 7 Aug 04 02:54 LAG2 21 0 10 2 +- 9 5 +- 6 7 7841 7 Aug 04 18:27 LAG1 13 0 8 3 +- 11 5 +- 9 3 7841 8 Aug 04 01:17 LAG2 13 0 11 -9 +- 17 -1 +- 14 4 7841 8 Aug 04 23:15 LAG2 15 0 5 2 +- 11 -1 +- 10 5 7841 9 Aug 04 03:19 LAG2 17 1 9 2 +- 10 -1 +- 9 8 7841 14 Aug 04 23:05 LAG1 3 0 6 -5 +- 98 0 +- 125 0 Station 7845 (Grasse) (position fixed, acc. 20 mm) 7845 9 Aug 04 12:21 LAG1 13 0 8 0 +- 18 5 +- 13 3 7845 9 Aug 04 21:08 LAG2 20 0 10 -7 +- 14 5 +- 11 2 7845 10 Aug 04 10:55 LAG1 17 0 8 2 +- 16 -5 +- 11 2 7845 11 Aug 04 13:09 LAG1 6 0 11 4 +- 27 -5 +- 13 1 7845 13 Aug 04 08:03 LAG2 9 0 6 12 +- 57 -7 +- 48 2 7845 13 Aug 04 13:53 LAG1 17 0 10 2 +- 16 -5 +- 8 2 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 7 Aug 04 06:59 LAG2 14 0 8 -6 +- 11 -1 +- 7 6 8834 7 Aug 04 11:19 LAG1 18 0 15 -12 +- 10 -1 +- 5 9 8834 7 Aug 04 14:55 LAG1 15 0 15 -12 +- 12 2 +- 8 3 8834 7 Aug 04 18:49 LAG1 6 0 6 7 +- 118 -6 +- 55 3 8834 8 Aug 04 04:58 LAG2 7 0 7 41 +- 124 19 +- 58 5 8834 8 Aug 04 09:07 LAG2 7 0 16 -17 +- 31 -2 +- 41 3 8834 8 Aug 04 17:21 LAG1 7 0 22 -35 +- 36 13 +- 29 3 8834 8 Aug 04 19:33 LAG2 2 0 12 -12 +- 483 0 +- 765 0 8834 8 Aug 04 20:44 LAG1 3 0 13 -13 +- 32 -1 +- 85 0 8834 8 Aug 04 23:03 LAG2 11 0 13 -11 +- 12 4 +- 9 2 8834 9 Aug 04 00:03 LAG1 11 0 4 -1 +- 15 1 +- 14 4 8834 9 Aug 04 03:19 LAG2 8 0 5 -7 +- 25 -3 +- 27 1 8834 9 Aug 04 07:07 LAG2 21 0 13 0 +- 9 -7 +- 7 8 8834 9 Aug 04 12:03 LAG1 9 0 24 1 +- 109 9 +- 43 3 8834 9 Aug 04 15:41 LAG1 11 0 21 -18 +- 19 1 +- 12 4 8834 9 Aug 04 19:25 LAG1 6 0 8 2 +- 29 4 +- 21 2 8834 10 Aug 04 01:11 LAG2 11 0 19 -3 +- 37 9 +- 22 5 8834 10 Aug 04 05:11 LAG2 18 0 6 1 +- 14 -1 +- 9 5 8834 10 Aug 04 09:22 LAG2 5 0 8 -9 +- 35 -1 +- 66 2 8834 10 Aug 04 10:42 LAG1 13 0 7 -5 +- 13 -5 +- 8 3 8834 10 Aug 04 21:36 LAG1 6 0 18 -12 +- 54 -3 +- 34 2 8834 10 Aug 04 23:42 LAG2 1 0 16 0 +- 0 0 +- 0 0 8834 11 Aug 04 08:07 LAG2 2 0 30 -849 +-2325 430 +-1219 0 8834 11 Aug 04 20:09 LAG1 7 0 5 -4 +- 20 0 +- 23 4 8834 12 Aug 04 01:28 LAG2 5 0 23 -16 +- 156 3 +- 86 1 8834 12 Aug 04 05:35 LAG2 14 0 4 -1 +- 11 -2 +- 9 3 8834 12 Aug 04 11:30 LAG1 10 0 23 -24 +- 24 0 +- 12 2 8834 12 Aug 04 15:13 LAG1 9 0 22 -18 +- 17 3 +- 13 4 -------------------------------------------------------------------------------- Distribution of daytime, nighttime and twilight passes since Jan 1, 2003: -------------------------------------------------------------------------- Station System Period Number of Passes LAGEOS-1 LAGEOS-2 Day/Night/Twil. Day/Night/Twil. Total -------------------------------------------------------------------------- 1824 KIEVLA 040314 - 040815 0/ 14/ 0 0/ 2/ 0 16 1831 LVIL 040812 - 040815 0/ 2/ 0 0/ 0/ 0 2 1863 MDNLAS 040103 - 040117 0/ 2/ 0 0/ 4/ 0 6 1864 MD2LAS 040102 - 040811 0/111/ 0 0/ 46/ 0 157 1868 KOMLAS 040315 - 040614 0/ 15/ 0 0/ 3/ 0 18 1873 SIMLAS 040118 - 040814 0/ 38/ 0 0/ 20/ 0 58 1884 RIGLAS 040310 - 040813 0/ 53/ 1 0/ 7/ 0 61 1893 CRMLAS 040331 - 040814 0/ 33/ 0 0/ 17/ 0 50 6405 TIGO 040103 - 040730 2/ 15/ 2 1/ 4/ 0 24 6810 ZIMLAT 040107 - 040816 106/170/ 23 120/ 89/ 9 517 7080 MLRS25 040104 - 040813 43/ 76/ 12 59/ 63/ 5 258 7090 ML0514 040101 - 040816 181/194/ 41 134/263/ 27 840 7105 ML0725 040104 - 040812 20/ 67/ 8 5/ 52/ 5 157 7110 ML0414 040102 - 040806 84/176/ 17 100/ 98/ 13 488 7124 ML0819 040315 - 040814 0/ 17/ 0 0/ 15/ 0 32 7210 HOLLAS 040105 - 040607 33/ 49/ 3 50/ 52/ 6 193 7231 WUHA01 040408 - 040809 0/ 3/ 0 0/ 9/ 0 12 7237 CHALAS 040101 - 040815 0/268/ 6 0/143/ 2 419 7249 BEJLAS 040101 - 040713 0/177/ 1 0/125/ 0 303 7308 CRLLAS 040106 - 040311 5/ 47/ 0 0/ 38/ 2 92 7355 TROS02 040509 - 040815 0/ 77/ 0 0/ 29/ 0 106 7405 TIGO 040103 - 040710 0/ 10/ 2 0/ 1/ 0 13 7501 ML0616 040106 - 040816 53/ 50/ 18 64/126/ 11 322 7806 METLAS 040720 - 040814 0/ 4/ 0 0/ 4/ 0 8 7810 ZIMLAT 040507 - 040816 113/ 83/ 19 106/ 31/ 9 361 7811 POLLAS 040105 - 040814 0/ 97/ 0 0/ 40/ 0 137 7823 FTLR** 040612 - 040626 0/ 9/ 0 1/ 1/ 1 12 7824 SPNLAS 040109 - 040813 0/100/ 0 0/ 57/ 1 158 7825 STL3 040807 - 040810 5/ 0/ 0 3/ 1/ 1 10 7832 SALRO 040102 - 040816 87/228/ 23 163/190/ 27 718 7835 GRASSE 040301 - 040809 1/ 64/ 3 0/ 32/ 1 101 7836 GFZLAS 040105 - 040701 0/ 38/ 0 0/ 21/ 1 60 7837 CHILAS 040102 - 040815 0/ 54/ 0 0/ 60/ 1 115 7838 SHOLAS 040105 - 040812 22/172/ 2 44/123/ 7 370 7839 AUSLAS 040107 - 040816 61/145/ 21 56/ 87/ 10 380 7840 RGOLAS 040102 - 040815 109/196/ 35 106/ 97/ 15 558 7841 GFZLA3 040112 - 040816 16/ 77/ 14 14/ 41/ 10 172 7845 GRASLL 040318 - 040813 6/ 15/ 0 11/ 3/ 0 35 7941 MLROnn 040111 - 040802 102/141/ 22 102/102/ 9 478 8834 WLRS01 040108 - 040816 149/163/ 37 156/ 93/ 15 613 -------------------------------------------------------------------------- C. EARTH ROTATION PARAMETER SOLUTIONS FOR IERS The following solutions for the polar motion and the UT1-UTC time difference were also obtained in the 10-day data arc analysis described in the previous section. Only solutions submitted to IERS are presented here. -------------------------------------------------------------- DATE X Y UT1-UTC (YYMMDD.D) (MAS) (MAS) (MS) -------------------------------------------------------------- 040808.0 91.5 +/- 0.1 514.7 +/- 0.1 -32507.19 +/- 0.01 040809.0 94.4 +/- 0.1 514.4 +/- 0.1 -32506.97 +/- 0.02 040810.0 97.2 +/- 0.1 513.8 +/- 0.1 -32506.50 +/- 0.03 040811.0 99.8 +/- 0.1 513.3 +/- 0.1 -32505.98 +/- 0.04 040812.0 103.0 +/- 0.1 513.4 +/- 0.1 -32505.40 +/- 0.05 040813.0 105.8 +/- 0.1 513.7 +/- 0.2 -32504.82 +/- 0.05 040814.0 108.9 +/- 0.2 513.8 +/- 0.2 -32504.34 +/- 0.07 -------------------------------------------------------------- D. COMMENTS 1. The analysis covered in this report is based on a new set of station coordinates: instead of the solution SSC(DUT)93L05, which was extrapolated over some 10 years beyond the epoch of the latest observations, the current analysis relies on the ITRF2000 solution. Tests performed during the last year show that the rms-of-fit that can be obtained when using ITRF2000 can be reduced to about 2 cm (instead of the 3+ cm which was achieved with the old model, for present-day epochs). Other model modifications are to be expected. We hope to serve the community with this development. 2. As of July 1, a new computation model and analysis strategy are in use: in terms of geometric modeling, models for ocean loading and atmospheric pressure loading have been turned on. The frequency of the solutions for the Earth Orientation Parameters has been increased to once per day (rather than once per 3 days). As a consequence, the arc length has been changed from 10 days to 8 days. Also, the empirical accelerations acting on the spacecraft are estimated twice per arc (i.e. for 4-day periods). To absorb (unmodeled) geocenter motion, 3 coefficients of the gravity field model are estimated: C(1,0), C(1,1) and S(1,1). Finally, the overall weighting scheme for the individual SLR observations is also modified slightly. 3. As of the same date, provisions for handling the dual-wavelength systems 7405 and 7810 properly have been installed. This is done by introducing dummy station ids 6405 and 6810 for the observations taken on 2nd wavelength. The specific analysis results are easily recognizable because the wavelength has been added to the printout of the station name. 4. As of July 7, 2004, similar provisions for handling the dual-wavelength system 7941 properly have been installed. This is done by introducing a dummy station id 6941 for the observations taken on 2nd wavelength. From: Ron Noomen ******************************************************************************** |