| Date: | 2005-10-09 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6143: Delft QL Report October 09, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-10-09 13:15:00 UTC Message No. 6143 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report October 09, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS October 9, 2005 This is a daily 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 Sun, Oct 9, 2005. 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 Sun, Oct 9, 2005. 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 ------------------------------------------------------------------------------ 1831 Lviv, Ukraine 051007 - 051009 4 3 1864 Maidanak, Uzbekistan (site 2) 051005 - 051006 3 1 1873 Simeiz, Crimea, Ukraine 051007 - 051009 5 2 1884 Riga, Latvia 051007 - 051008 4 2 1893 Kazivili, Crimea, Ukraine 051007 - 051007 1 - 6405 Concepcion, Chile (TIGO 847) 051007 - 051007 1 1 6810 Zimmerwald 846, Switzerland 051007 - 051009 10 7 7090 Yarragadee, Australia 051007 - 051008 2 2 7110 Monument Peak, California 051007 - 051008 3 1 7124 Papeete, Tahiti 051007 - 051008 1 2 7231 Wuhan, China (new) 051008 - 051008 1 1 7237 Changchun, China 051008 - 051008 3 2 7249 Beijing, China 051007 - 051008 4 2 7810 Zimmerwald 423, Switzerland 051007 - 051009 10 7 7811 Borowiec, Poland 051007 - 051008 3 - 7824 San Fernando, Spain 051008 - 051008 1 - 7832 Riyad, Saudi Arabia 051007 - 051009 5 4 7838 Simosato Observatory, Japan 051007 - 051007 - 1 7840 Herstmonceux, United Kingdom 051008 - 051009 1 2 7841 Potsdam, Germany 051008 - 051008 1 - 7848 Ajaccio, Corsica (FTLRS) 051008 - 051008 - 1 8834 Wettzell, Germany 051007 - 051009 9 7 ------ ------ --- --- TOTAL 051005 - 051009 72 48 ------------------------------------------------------------------------------ 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, Oct 1, 2005 to Sun, Oct 9, 2005. 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 26 25 Number of Passes 212/209 152/151 Number of Normal Points 2240/2192 1504/1489 Weighted RMS of Fit (mm) 14 14 ----------------------------------------------------------------------- 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 1824 (Kiev) (position solved, acc. 200 mm) 1824 5 Oct 05 16:47 LAG1 2 0 51 -2585 +-9999 1373 +-9999 0 1824 5 Oct 05 20:05 LAG1 3 0 72 -94 +- 451 53 +- 381 1 1824 5 Oct 05 23:31 LAG1 4 0 95 -62 +- 419 95 +- 380 58 1824 6 Oct 05 01:13 LAG2 6 0 51 -194 +-1183 122 +- 705 28 1824 6 Oct 05 18:42 LAG1 1 0 34 0 +- 0 0 +- 0 0 1824 6 Oct 05 22:10 LAG1 10 0 68 28 +- 273 -22 +- 213 64 1824 6 Oct 05 23:17 LAG2 4 0 110 266 +-1226 -217 +- 913 82 1824 7 Oct 05 01:38 LAG1 2 0 55 79 +- 669 140 +-2517 0 Station 1831 (Lviv) (position fixed, acc. 400 mm) 1831 4 Oct 05 17:47 LAG1 13 0 35 -2 +- 339 -6 +- 258 34 1831 4 Oct 05 21:17 LAG1 2 0 105 -422 +-5444 -189 +-3082 0 1831 5 Oct 05 02:46 LAG2 9 0 94 -97 +- 419 22 +- 439 18 1831 5 Oct 05 19:58 LAG1 3 0 131 -128 +- 704 23 +- 444 32 1831 5 Oct 05 23:21 LAG1 8 0 93 -125 +- 677 -115 +- 558 28 1831 6 Oct 05 01:05 LAG2 7 0 65 22 +-1117 34 +- 901 15 1831 6 Oct 05 03:01 LAG1 7 0 104 -22 +- 627 -76 +- 549 12 1831 6 Oct 05 22:10 LAG1 3 0 110 -150 +-1580 -70 +-2365 4 1831 6 Oct 05 23:09 LAG2 6 0 112 131 +- 975 -21 +- 882 15 1831 7 Oct 05 01:37 LAG1 5 0 66 -3 +- 599 -114 +-1013 10 1831 7 Oct 05 03:03 LAG2 9 0 28 14 +- 414 29 +- 534 14 1831 7 Oct 05 20:41 LAG1 14 0 104 -104 +- 338 -40 +- 249 25 1831 8 Oct 05 00:09 LAG1 14 0 137 -15 +- 325 -94 +- 232 24 1831 8 Oct 05 01:32 LAG2 3 0 71 -1305 +-9999 597 +-5989 20 1831 8 Oct 05 22:49 LAG1 10 0 95 -106 +- 484 -92 +- 414 18 1831 8 Oct 05 23:16 LAG2 9 0 159 164 +- 418 -30 +- 526 11 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 1 Oct 05 18:23 LAG1 7 0 61 72 +- 322 -77 +- 378 31 1864 4 Oct 05 19:08 LAG2 4 0 29 49 +- 969 -70 +-1118 21 1864 5 Oct 05 16:17 LAG1 10 0 29 21 +- 202 9 +- 143 20 1864 5 Oct 05 19:50 LAG1 4 0 44 -8 +- 366 78 +- 924 25 1864 5 Oct 05 21:13 LAG2 2 0 15 -51 +-2012 95 +-4893 0 1864 6 Oct 05 15:19 LAG1 5 0 26 72 +-1511 -46 +- 773 13 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 1 Oct 05 18:41 LAG1 3 0 106 191 +-1393 -46 +- 715 2 1873 3 Oct 05 22:55 LAG1 1 0 141 0 +- 0 0 +- 0 0 1873 4 Oct 05 21:21 LAG1 6 0 86 82 +- 245 10 +- 299 21 1873 5 Oct 05 00:59 LAG1 4 0 128 130 +-1771 0 +- 861 12 1873 5 Oct 05 23:15 LAG1 3 0 76 153 +-1544 44 +- 832 1 1873 6 Oct 05 19:02 LAG1 1 0 146 0 +- 0 0 +- 0 0 1873 6 Oct 05 23:29 LAG2 1 0 154 0 +- 0 0 +- 0 0 1873 7 Oct 05 17:29 LAG1 10 0 193 275 +- 481 -48 +- 244 17 1873 7 Oct 05 20:53 LAG1 6 0 241 234 +- 369 9 +- 460 27 1873 8 Oct 05 00:21 LAG1 8 0 208 313 +- 668 -64 +- 376 14 1873 8 Oct 05 01:16 LAG2 8 0 259 289 +- 291 -38 +- 218 36 1873 8 Oct 05 23:02 LAG1 5 1 521 2643 +-2093 -1258 +-1149 152*CHK* 1873 8 Oct 05 23:23 LAG2 11 1 247 309 +- 347 -61 +- 264 24 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 1 Oct 05 18:27 LAG1 9 0 9 -7 +- 122 6 +- 111 7 1884 5 Oct 05 19:50 LAG1 14 0 31 -11 +- 80 15 +- 45 10 1884 7 Oct 05 20:47 LAG1 14 0 19 -12 +- 93 14 +- 61 4 1884 8 Oct 05 00:17 LAG1 13 0 20 -24 +- 102 10 +- 68 4 1884 8 Oct 05 01:01 LAG2 16 0 9 -1 +- 78 -7 +- 60 3 1884 8 Oct 05 19:35 LAG1 9 0 22 4 +- 233 10 +- 134 2 1884 8 Oct 05 22:57 LAG1 12 0 12 5 +- 106 5 +- 75 4 1884 8 Oct 05 23:23 LAG2 12 0 14 13 +- 128 0 +- 103 2 Station 1893 (Kazivili) (position fixed, acc. 100 mm) 1893 7 Oct 05 17:15 LAG1 6 0 40 12 +- 319 -18 +- 232 16 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 3 Oct 05 20:41 LAG1 4 0 46 -3 +- 230 26 +- 126 12 6405 4 Oct 05 17:25 LAG2 5 0 18 13 +- 278 2 +- 149 5 6405 5 Oct 05 01:37 LAG2 10 0 8 -3 +- 51 -3 +- 36 1 6405 5 Oct 05 05:29 LAG2 4 4 0 0 +- 0 0 +- 0 0 6405 5 Oct 05 19:33 LAG2 7 0 21 -25 +- 181 2 +- 96 7 6405 5 Oct 05 21:11 LAG1 11 0 16 -16 +- 20 7 +- 18 3 6405 5 Oct 05 23:09 LAG2 20 0 18 18 +- 18 9 +- 14 10 6405 6 Oct 05 21:33 LAG2 5 0 18 -9 +- 34 -28 +- 109 8 6405 7 Oct 05 19:39 LAG2 12 0 6 -15 +- 54 7 +- 34 1 6405 7 Oct 05 21:51 LAG1 14 0 13 3 +- 18 -8 +- 13 2 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 5 Oct 05 10:55 LAG2 3 0 4 -4 +- 128 -1 +- 596 0 6810 5 Oct 05 16:37 LAG1 5 0 15 15 +- 83 0 +- 247 1 6810 5 Oct 05 19:57 LAG1 18 0 35 -11 +- 43 17 +- 23 2 6810 5 Oct 05 23:27 LAG1 16 0 38 -33 +- 45 13 +- 33 1 6810 6 Oct 05 00:31 LAG2 18 0 9 1 +- 43 5 +- 28 3 6810 6 Oct 05 18:51 LAG1 13 0 11 -1 +- 83 -5 +- 43 3 6810 6 Oct 05 22:15 LAG1 10 0 6 -7 +- 73 2 +- 49 3 6810 6 Oct 05 22:39 LAG2 17 0 16 -3 +- 46 -11 +- 35 4 6810 7 Oct 05 01:28 LAG1 21 0 8 -6 +- 40 -1 +- 22 4 6810 7 Oct 05 02:39 LAG2 22 0 5 -1 +- 39 -2 +- 22 3 6810 7 Oct 05 04:59 LAG1 17 0 5 1 +- 45 -3 +- 29 2 6810 7 Oct 05 06:51 LAG2 14 0 7 1 +- 63 -4 +- 42 2 6810 7 Oct 05 10:59 LAG2 13 0 16 -9 +- 60 -6 +- 50 4 6810 7 Oct 05 17:11 LAG1 23 0 11 2 +- 38 -5 +- 22 6 6810 7 Oct 05 20:41 LAG1 13 0 24 5 +- 53 12 +- 25 4 6810 8 Oct 05 00:08 LAG1 15 0 25 -23 +- 47 6 +- 27 3 6810 8 Oct 05 00:44 LAG2 18 0 11 7 +- 43 -4 +- 22 4 6810 8 Oct 05 03:38 LAG1 17 0 7 -1 +- 47 -2 +- 25 5 6810 8 Oct 05 04:49 LAG2 19 0 6 0 +- 42 1 +- 20 5 6810 8 Oct 05 07:19 LAG1 12 0 16 -16 +- 54 -3 +- 72 2 6810 8 Oct 05 08:53 LAG2 11 0 11 -1 +- 57 4 +- 36 8 6810 8 Oct 05 15:43 LAG1 23 0 8 5 +- 38 2 +- 28 6 6810 8 Oct 05 19:15 LAG1 23 0 11 5 +- 38 1 +- 17 8 6810 8 Oct 05 22:49 LAG1 14 0 8 5 +- 49 3 +- 27 3 6810 8 Oct 05 22:51 LAG2 10 0 11 -2 +- 58 5 +- 36 6 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 5 Oct 05 01:41 LAG1 12 0 11 14 +- 28 -10 +- 17 2 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 1 Oct 05 11:33 LAG1 10 0 8 -3 +- 24 3 +- 18 3 7090 1 Oct 05 11:51 LAG2 16 0 29 -26 +- 11 -20 +- 9 4 7090 1 Oct 05 16:17 LAG2 13 0 18 23 +- 20 -25 +- 16 2 7090 2 Oct 05 09:57 LAG2 15 0 10 -10 +- 10 1 +- 14 1 7090 2 Oct 05 10:25 LAG1 12 0 15 -19 +- 19 4 +- 12 3 7090 2 Oct 05 14:01 LAG2 25 0 19 -5 +- 8 10 +- 4 2 7090 2 Oct 05 22:57 LAG1 11 0 23 -18 +- 15 -5 +- 12 3 7090 3 Oct 05 12:03 LAG2 11 0 5 -15 +- 46 -7 +- 29 0 7090 3 Oct 05 16:17 LAG2 16 0 9 2 +- 10 -9 +- 11 2 7090 4 Oct 05 10:47 LAG2 5 0 3 -50 +- 280 29 +- 160 1 7090 4 Oct 05 10:58 LAG1 16 0 11 -11 +- 10 0 +- 7 1 7090 4 Oct 05 14:31 LAG2 15 0 10 -10 +- 13 8 +- 9 2 7090 5 Oct 05 22:09 LAG1 19 0 17 -15 +- 9 2 +- 6 5 7090 6 Oct 05 06:17 LAG2 7 0 7 -2 +- 15 -2 +- 31 7 7090 6 Oct 05 08:45 LAG1 4 0 42 -25 +- 260 30 +- 117 5 7090 6 Oct 05 10:15 LAG2 24 0 12 -11 +- 8 0 +- 6 4 7090 6 Oct 05 11:59 LAG1 11 0 13 -7 +- 15 17 +- 16 2 7090 6 Oct 05 14:23 LAG2 15 0 13 -8 +- 13 3 +- 7 3 7090 6 Oct 05 20:53 LAG1 18 0 13 -13 +- 10 0 +- 8 3 7090 7 Oct 05 04:37 LAG2 2 0 23 -187 +- 672 126 +- 515 0 7090 7 Oct 05 08:23 LAG2 13 0 10 -4 +- 13 -16 +- 17 2 7090 7 Oct 05 10:19 LAG1 18 0 13 -5 +- 10 -6 +- 5 3 7090 7 Oct 05 12:27 LAG2 18 0 9 -9 +- 11 -5 +- 6 1 7090 7 Oct 05 16:43 LAG2 16 0 3 2 +- 10 0 +- 13 2 7090 8 Oct 05 09:05 LAG1 17 0 10 -8 +- 10 4 +- 5 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 1 Oct 05 03:21 LAG1 13 0 6 -4 +- 15 -1 +- 11 1 7105 1 Oct 05 05:25 LAG2 9 0 9 -11 +- 21 -1 +- 12 1 7105 1 Oct 05 06:35 LAG1 12 0 8 -7 +- 12 -5 +- 12 1 7105 3 Oct 05 05:53 LAG2 12 0 15 -12 +- 12 -6 +- 10 2 7105 3 Oct 05 09:43 LAG2 16 0 15 -5 +- 10 -8 +- 5 3 7105 3 Oct 05 10:43 LAG1 15 0 11 -8 +- 11 3 +- 7 1 7105 4 Oct 05 09:17 LAG1 6 0 3 0 +- 27 0 +- 19 3 7105 5 Oct 05 06:11 LAG2 11 0 22 -18 +- 13 -9 +- 14 5 7105 6 Oct 05 06:47 LAG1 10 0 8 -1 +- 16 7 +- 16 0 7105 6 Oct 05 08:19 LAG2 6 0 14 -12 +- 32 3 +- 39 1 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 3 Oct 05 01:01 LAG1 7 0 6 6 +- 40 -6 +- 27 4 7110 3 Oct 05 04:11 LAG1 14 0 10 -7 +- 12 -5 +- 7 6 7110 3 Oct 05 14:03 LAG2 6 0 7 -6 +- 22 -2 +- 43 2 7110 4 Oct 05 02:47 LAG1 22 0 7 -1 +- 8 3 +- 4 2 7110 4 Oct 05 06:27 LAG1 3 0 4 4 +- 89 0 +- 122 1 7110 4 Oct 05 07:51 LAG2 8 0 10 -9 +- 16 10 +- 17 3 7110 4 Oct 05 09:57 LAG1 2 0 10 18 +- 408 -9 +- 463 0 7110 4 Oct 05 12:01 LAG2 7 0 8 -10 +- 20 13 +- 35 2 7110 4 Oct 05 12:55 LAG1 22 0 14 8 +- 8 -5 +- 4 3 7110 5 Oct 05 01:39 LAG1 16 0 22 6 +- 13 -15 +- 8 3 7110 5 Oct 05 05:01 LAG1 9 0 7 -4 +- 32 -7 +- 22 1 7110 5 Oct 05 06:15 LAG2 4 0 25 -3 +- 144 -17 +- 119 4 7110 5 Oct 05 09:49 LAG2 6 0 3 -3 +- 79 -3 +- 54 1 7110 5 Oct 05 14:11 LAG2 9 0 4 -3 +- 14 -6 +- 23 1 7110 6 Oct 05 03:36 LAG1 14 0 12 -2 +- 11 8 +- 7 2 7110 6 Oct 05 13:45 LAG1 17 0 5 1 +- 11 -2 +- 7 3 7110 7 Oct 05 02:15 LAG1 16 0 16 -5 +- 11 -5 +- 5 2 7110 7 Oct 05 05:47 LAG1 4 0 4 -22 +- 156 -15 +- 97 2 7110 7 Oct 05 06:02 LAG2 6 0 17 -14 +- 17 -10 +- 13 1 7110 7 Oct 05 09:54 LAG2 6 0 28 -18 +- 17 -11 +- 9 3 7110 7 Oct 05 12:49 LAG1 5 0 26 -14 +- 74 -6 +- 41 2 7110 8 Oct 05 01:09 LAG1 11 0 13 18 +- 19 -14 +- 15 2 7110 8 Oct 05 04:25 LAG1 5 0 4 -6 +- 34 -4 +- 21 2 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 3 Oct 05 09:11 LAG2 14 0 8 19 +- 26 -11 +- 15 1 7124 4 Oct 05 11:14 LAG2 7 0 10 -10 +- 23 3 +- 46 4 7124 5 Oct 05 09:19 LAG2 3 0 12 7 +- 48 -14 +- 140 1 7124 6 Oct 05 04:23 LAG1 9 0 8 2 +- 14 8 +- 15 1 7124 6 Oct 05 07:12 LAG2 6 0 5 16 +- 70 14 +- 53 1 7124 7 Oct 05 06:41 LAG1 2 0 25 -33 +- 104 39 +- 488 0 7124 7 Oct 05 09:19 LAG2 4 0 13 -35 +- 221 -30 +- 137 1 7124 8 Oct 05 05:09 LAG1 11 0 8 -7 +- 12 -3 +- 13 1 7124 8 Oct 05 07:33 LAG2 4 0 10 14 +- 79 5 +- 83 3 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 8 Oct 05 12:05 LAG1 14 1 12392-12385 +- 42 51 +- 31 578*CHK* 7231 8 Oct 05 15:59 LAG2 3 0 13357 -8370 +-1951 -2374 +- 928 1*CHK* Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 1 Oct 05 16:56 LAG2 2 0 15 17 +- 860 30 +- 804 0 7237 2 Oct 05 09:49 LAG1 3 0 62 -9 +- 391 -65 +- 474 1 7237 2 Oct 05 16:29 LAG1 7 0 23 21 +- 60 4 +- 45 12 7237 2 Oct 05 19:55 LAG1 5 0 12 -1 +- 238 6 +- 159 6 7237 3 Oct 05 11:35 LAG1 3 0 50 32 +- 91 11 +- 34 7 7237 3 Oct 05 13:30 LAG2 2 0 96 146 +- 647 -94 +-1207 0 7237 3 Oct 05 15:05 LAG1 10 0 49 54 +- 55 21 +- 37 14 7237 3 Oct 05 17:11 LAG2 15 0 25 13 +- 49 -20 +- 33 6 7237 3 Oct 05 18:27 LAG1 14 0 39 0 +- 47 24 +- 30 6 7237 4 Oct 05 10:21 LAG1 14 0 19 14 +- 40 -7 +- 26 7 7237 4 Oct 05 19:32 LAG2 4 0 17 -21 +- 319 29 +- 277 10 7237 4 Oct 05 20:41 LAG1 7 0 21 29 +- 148 6 +- 99 6 7237 5 Oct 05 12:33 LAG1 7 0 27 27 +- 58 7 +- 54 4 7237 5 Oct 05 16:01 LAG1 6 0 16 15 +- 81 1 +- 124 6 7237 5 Oct 05 17:23 LAG2 2 0 53 -361 +-2401 -335 +-1956 0 7237 5 Oct 05 19:22 LAG1 9 0 32 -1 +- 51 24 +- 39 3 7237 8 Oct 05 11:57 LAG1 10 0 55 35 +- 50 15 +- 25 14 7237 8 Oct 05 15:27 LAG1 4 0 16 14 +- 211 3 +- 216 11 7237 8 Oct 05 15:54 LAG2 10 0 15 4 +- 119 -9 +- 77 10 7237 8 Oct 05 18:52 LAG1 12 0 23 15 +- 55 6 +- 36 6 7237 8 Oct 05 19:42 LAG2 3 0 25 21 +- 343 -2 +- 239 5 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 1 Oct 05 21:10 LAG2 3 0 23 101 +- 476 -97 +- 492 13 7249 1 Oct 05 21:29 LAG1 2 0 16 -16 +- 167 -3 +-1161 0 7249 3 Oct 05 11:47 LAG1 15 0 18 -3 +- 39 -1 +- 25 17 7249 3 Oct 05 15:27 LAG1 3 0 48 -51 +- 141 24 +- 275 23 7249 3 Oct 05 17:09 LAG2 12 0 11 4 +- 62 -4 +- 50 10 7249 3 Oct 05 18:38 LAG1 11 0 19 -10 +- 46 7 +- 38 14 7249 3 Oct 05 21:07 LAG2 7 0 13 -18 +- 137 -22 +- 132 9 7249 7 Oct 05 16:47 LAG1 13 0 28 21 +- 42 -19 +- 40 6 7249 7 Oct 05 17:39 LAG2 11 0 10 -15 +- 81 6 +- 59 5 7249 7 Oct 05 20:18 LAG1 12 0 9 -9 +- 71 6 +- 42 6 7249 8 Oct 05 12:02 LAG1 16 0 22 6 +- 39 11 +- 24 8 7249 8 Oct 05 18:51 LAG1 13 0 19 15 +- 43 -9 +- 36 8 7249 8 Oct 05 19:36 LAG2 16 0 9 -5 +- 38 0 +- 32 8 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 1 Oct 05 19:31 LAG2 7 0 26 5 +- 99 -12 +- 57 2 7501 2 Oct 05 22:11 LAG2 6 0 9 9 +- 113 -11 +- 69 2 7501 3 Oct 05 06:33 LAG1 5 0 12 -2 +- 94 11 +- 69 2 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 5 Oct 05 10:55 LAG2 3 0 7 -8 +- 131 7 +- 599 0 7810 5 Oct 05 16:37 LAG1 5 0 10 10 +- 83 -1 +- 250 1 7810 5 Oct 05 19:57 LAG1 18 0 38 -17 +- 43 17 +- 23 3 7810 5 Oct 05 23:27 LAG1 17 0 40 -38 +- 44 13 +- 30 2 7810 6 Oct 05 00:31 LAG2 16 0 10 -3 +- 47 5 +- 31 3 7810 6 Oct 05 18:51 LAG1 13 0 8 5 +- 83 -5 +- 44 3 7810 6 Oct 05 22:15 LAG1 10 0 12 -13 +- 73 1 +- 49 2 7810 6 Oct 05 22:39 LAG2 19 0 19 -5 +- 43 -11 +- 30 5 7810 7 Oct 05 01:27 LAG1 21 0 12 -12 +- 39 0 +- 21 4 7810 7 Oct 05 02:39 LAG2 19 0 6 -1 +- 42 -2 +- 23 3 7810 7 Oct 05 04:57 LAG1 17 0 7 -6 +- 47 -3 +- 30 4 7810 7 Oct 05 06:51 LAG2 13 0 3 -4 +- 69 -2 +- 45 1 7810 7 Oct 05 10:59 LAG2 7 0 22 -20 +- 69 -12 +- 81 1 7810 7 Oct 05 17:11 LAG1 22 0 11 0 +- 39 -6 +- 23 4 7810 7 Oct 05 20:42 LAG1 8 0 21 1 +- 151 11 +- 76 4 7810 8 Oct 05 00:09 LAG1 15 0 27 -24 +- 47 5 +- 28 2 7810 8 Oct 05 00:44 LAG2 14 0 9 4 +- 53 -3 +- 31 3 7810 8 Oct 05 03:39 LAG1 16 0 9 -6 +- 48 -2 +- 25 4 7810 8 Oct 05 04:49 LAG2 17 0 6 -4 +- 44 1 +- 23 3 7810 8 Oct 05 07:19 LAG1 12 0 20 -19 +- 54 -1 +- 72 4 7810 8 Oct 05 08:55 LAG2 8 0 9 -4 +- 72 3 +- 49 3 7810 8 Oct 05 15:43 LAG1 22 0 7 -2 +- 39 2 +- 30 5 7810 8 Oct 05 19:15 LAG1 23 0 10 2 +- 38 1 +- 17 9 7810 8 Oct 05 22:48 LAG1 13 0 8 6 +- 52 3 +- 30 5 7810 8 Oct 05 23:02 LAG2 9 0 6 4 +- 64 1 +- 44 3 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 4 Oct 05 17:47 LAG1 15 0 40 38 +- 47 -7 +- 34 8 7811 4 Oct 05 21:19 LAG1 14 0 16 7 +- 48 1 +- 36 15 7811 5 Oct 05 00:45 LAG1 15 0 13 10 +- 47 -2 +- 33 8 7811 5 Oct 05 19:59 LAG1 14 0 28 3 +- 49 19 +- 34 7 7811 6 Oct 05 22:04 LAG1 16 0 17 15 +- 46 0 +- 31 8 7811 6 Oct 05 23:03 LAG2 10 0 24 24 +- 64 -13 +- 57 9 7811 7 Oct 05 01:33 LAG1 14 0 24 23 +- 49 -4 +- 36 6 7811 7 Oct 05 17:21 LAG1 3 0 54985 69 +- 252 -99465 +- 457 15*CHK* 7811 7 Oct 05 20:45 LAG1 14 0 32 28 +- 48 9 +- 35 11 7811 8 Oct 05 00:25 LAG1 3 0 48605 12 +- 220 -99464 +- 452 6*CHK* Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 1 Oct 05 18:47 LAG1 11 0 44 50 +- 80 -3 +- 44 3 7824 3 Oct 05 02:13 LAG2 8 0 59 58 +- 43 -3 +- 31 6 7824 3 Oct 05 19:17 LAG1 6 0 21 69 +- 167 36 +- 86 3 7824 4 Oct 05 21:32 LAG1 12 0 36 36 +- 35 7 +- 31 5 7824 5 Oct 05 02:23 LAG2 4 0 69 74 +- 680 2 +- 362 0 7824 5 Oct 05 20:31 LAG1 9 0 85 75 +- 179 4 +- 77 4 7824 6 Oct 05 19:06 LAG1 4 0 69 88 +- 232 -14 +- 169 0 7824 8 Oct 05 19:29 LAG1 12 0 66 62 +- 36 3 +- 15 11 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 1 Oct 05 01:23 LAG1 2 0 2 -3 +- 187 0 +- 423 0 7825 1 Oct 05 03:59 LAG2 8 0 2 0 +- 25 0 +- 13 1 7825 1 Oct 05 04:36 LAG1 8 2 5 -4 +- 19 2 +- 35 2 7825 1 Oct 05 07:50 LAG1 21 0 8 -1 +- 9 1 +- 4 7 7825 1 Oct 05 11:59 LAG2 26 2 14 0 +- 8 -8 +- 5 2 7825 1 Oct 05 20:17 LAG1 24 0 11 -10 +- 8 0 +- 4 4 7825 1 Oct 05 23:57 LAG1 3 0 10 -77 +- 212 -52 +- 137 3 7825 2 Oct 05 03:25 LAG1 4 0 10 9 +- 21 -14 +- 76 2 7825 2 Oct 05 06:13 LAG2 12 0 16 1 +- 22 12 +- 19 2 7825 2 Oct 05 06:41 LAG1 14 0 14 -6 +- 11 -7 +- 8 5 7825 2 Oct 05 10:05 LAG2 28 0 15 -7 +- 7 8 +- 5 2 7825 2 Oct 05 14:11 LAG2 19 0 17 0 +- 9 16 +- 9 3 7825 2 Oct 05 18:58 LAG1 18 1 17 6 +- 10 -11 +- 8 9 7825 2 Oct 05 22:29 LAG1 16 0 8 -3 +- 10 -2 +- 5 6 7825 3 Oct 05 04:11 LAG2 13 0 8 4 +- 17 -5 +- 10 4 7825 3 Oct 05 05:15 LAG1 18 2 9 7 +- 10 1 +- 7 5 7825 3 Oct 05 08:05 LAG2 16 0 9 -1 +- 12 -7 +- 8 2 7825 3 Oct 05 08:47 LAG1 20 0 10 -4 +- 9 6 +- 6 3 7825 3 Oct 05 12:15 LAG2 25 0 3 -2 +- 8 0 +- 5 2 7825 4 Oct 05 04:05 LAG1 4 0 7 -8 +- 57 -1 +- 76 3 7825 4 Oct 05 06:19 LAG2 14 0 5 -2 +- 11 0 +- 13 4 7825 4 Oct 05 07:21 LAG1 8 0 8 8 +- 19 2 +- 9 5 7825 5 Oct 05 04:25 LAG2 11 1 20 4 +- 17 -14 +- 12 8 7825 5 Oct 05 05:57 LAG1 17 0 12 3 +- 10 -5 +- 6 6 7825 5 Oct 05 08:21 LAG2 11 0 20 0 +- 12 -15 +- 9 5 7825 5 Oct 05 09:43 LAG1 14 0 7 7 +- 13 -4 +- 12 4 7825 5 Oct 05 21:57 LAG1 14 0 20 -7 +- 13 9 +- 8 4 7825 6 Oct 05 02:35 LAG2 12 0 14 0 +- 26 8 +- 16 2 7825 6 Oct 05 04:45 LAG1 15 0 25 11 +- 10 17 +- 8 6 7825 6 Oct 05 06:29 LAG2 16 0 7 5 +- 10 -1 +- 10 4 7825 6 Oct 05 08:13 LAG1 15 0 19 5 +- 10 13 +- 8 4 7825 6 Oct 05 10:35 LAG2 16 0 22 7 +- 10 11 +- 5 5 7825 6 Oct 05 20:31 LAG1 25 0 14 10 +- 8 3 +- 4 8 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 1 Oct 05 02:11 LAG1 12 0 9 -8 +- 21 -1 +- 11 5 7832 1 Oct 05 14:59 LAG1 9 0 24 -25 +- 25 -3 +- 26 3 7832 1 Oct 05 18:25 LAG1 8 0 6 6 +- 23 3 +- 25 1 7832 1 Oct 05 20:09 LAG2 7 0 14 -65 +- 147 -32 +- 86 2 7832 2 Oct 05 00:25 LAG2 10 0 11 8 +- 22 16 +- 34 2 7832 2 Oct 05 00:56 LAG1 8 0 5 1 +- 26 -2 +- 21 4 7832 2 Oct 05 04:39 LAG1 7 0 13 12 +- 29 0 +- 47 4 7832 2 Oct 05 04:57 LAG2 3 0 12 4 +- 44 47 +- 229 3 7832 2 Oct 05 09:08 LAG2 6 0 3 1 +- 123 0 +- 82 2 7832 2 Oct 05 13:39 LAG1 10 0 17 8 +- 21 -19 +- 24 4 7832 2 Oct 05 17:05 LAG1 7 0 13 -21 +- 62 -20 +- 43 5 7832 2 Oct 05 18:27 LAG2 6 0 19 10 +- 29 -17 +- 41 5 7832 2 Oct 05 22:15 LAG2 11 0 13 -13 +- 26 -11 +- 18 4 7832 2 Oct 05 23:40 LAG1 10 0 8 4 +- 23 0 +- 27 7 7832 3 Oct 05 03:01 LAG1 8 0 7 -25 +- 84 -12 +- 43 1 7832 3 Oct 05 07:01 LAG2 6 0 9 -9 +- 28 -5 +- 35 1 7832 3 Oct 05 15:39 LAG1 10 0 22 -27 +- 46 -4 +- 25 5 7832 4 Oct 05 05:03 LAG2 11 0 14 7 +- 19 12 +- 25 5 7832 4 Oct 05 09:05 LAG2 7 0 10 7 +- 33 -5 +- 52 3 7832 4 Oct 05 14:19 LAG1 11 0 26 0 +- 29 -20 +- 22 3 7832 4 Oct 05 17:47 LAG1 11 0 17 -27 +- 34 -20 +- 23 2 7832 4 Oct 05 18:37 LAG2 7 0 35 25 +- 68 -12 +- 80 1 7832 4 Oct 05 22:29 LAG2 13 0 22 -21 +- 35 -25 +- 24 4 7832 5 Oct 05 00:23 LAG1 10 0 6 -3 +- 21 0 +- 19 5 7832 5 Oct 05 02:51 LAG2 10 0 7 11 +- 54 6 +- 46 5 7832 5 Oct 05 04:07 LAG1 9 0 9 5 +- 38 1 +- 32 6 7832 5 Oct 05 07:09 LAG2 8 0 8 8 +- 41 1 +- 38 4 7832 5 Oct 05 13:17 LAG1 1 0 12 0 +- 0 0 +- 0 0 7832 5 Oct 05 16:33 LAG1 7 0 16 -19 +- 49 -2 +- 38 1 7832 7 Oct 05 21:07 LAG2 3 0 9 -13 +- 69 -18 +- 252 1 7832 7 Oct 05 23:53 LAG1 11 0 9 -8 +- 21 2 +- 22 1 7832 8 Oct 05 01:07 LAG2 7 0 5 13 +- 79 9 +- 79 2 7832 8 Oct 05 03:37 LAG1 7 0 5 -9 +- 68 8 +- 47 2 7832 8 Oct 05 15:57 LAG1 11 0 9 1 +- 20 -3 +- 12 6 7832 8 Oct 05 19:03 LAG2 10 0 12 -3 +- 21 11 +- 20 2 7832 8 Oct 05 22:43 LAG1 7 0 11 11 +- 25 2 +- 53 1 7832 8 Oct 05 22:57 LAG2 17 0 4 0 +- 19 -2 +- 15 3 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 7 Oct 05 17:33 LAG2 15 0 45 43 +- 24 11 +- 23 4 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 1 Oct 05 06:09 LAG2 10 0 6 5 +- 21 0 +- 12 3 7840 1 Oct 05 06:15 LAG1 10 0 13 6 +- 21 -6 +- 14 4 7840 1 Oct 05 10:10 LAG2 9 0 11 3 +- 23 -9 +- 19 3 7840 1 Oct 05 18:21 LAG1 19 0 8 4 +- 15 -4 +- 9 2 7840 1 Oct 05 21:51 LAG1 16 0 14 11 +- 17 7 +- 10 4 7840 2 Oct 05 00:17 LAG2 15 0 13 -6 +- 17 10 +- 16 3 7840 2 Oct 05 08:15 LAG2 7 0 15 2 +- 33 8 +- 16 3 7840 2 Oct 05 20:29 LAG1 17 0 7 0 +- 16 3 +- 8 2 7840 2 Oct 05 22:39 LAG2 4 0 4 -3 +- 33 -10 +- 194 1 7840 3 Oct 05 06:19 LAG2 21 0 7 2 +- 14 -3 +- 9 3 7840 3 Oct 05 07:17 LAG1 9 0 11 -9 +- 32 -2 +- 35 1 7840 3 Oct 05 10:25 LAG2 10 0 24 -19 +- 21 -13 +- 15 1 7840 4 Oct 05 17:49 LAG1 17 0 29 22 +- 16 -15 +- 11 4 7840 8 Oct 05 04:49 LAG2 9 0 7 8 +- 30 5 +- 17 3 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 8 Oct 05 19:49 LAG1 7 0 3 0 +- 118 0 +- 47 3 Station 7848 (Ajaccio) (position solved, acc. 30 mm) 7848 6 Oct 05 04:57 LAG2 2 0 0 0 +- 90 0 +- 173 0 7848 8 Oct 05 05:17 LAG2 2 0 3 3 +- 89 -27 +- 581 0 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 1 Oct 05 18:24 LAG1 13 0 7 -4 +- 11 0 +- 7 5 7941 1 Oct 05 21:59 LAG1 3 0 2 9 +- 103 9 +- 100 1 7941 2 Oct 05 00:39 LAG2 4 0 6 -11 +- 189 10 +- 111 1 7941 2 Oct 05 01:19 LAG1 15 0 10 4 +- 11 5 +- 8 2 7941 2 Oct 05 04:15 LAG2 12 0 11 8 +- 15 10 +- 12 3 7941 2 Oct 05 05:01 LAG1 7 0 5 11 +- 48 -8 +- 30 2 7941 2 Oct 05 22:33 LAG2 10 0 4 3 +- 18 -4 +- 18 3 7941 2 Oct 05 23:55 LAG1 7 0 15 -7 +- 47 5 +- 33 1 7941 5 Oct 05 16:51 LAG1 7 0 12 -19 +- 69 13 +- 36 9 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 5 Oct 05 06:45 LAG2 6 0 8 -8 +- 25 -1 +- 20 4 8834 5 Oct 05 16:20 LAG1 13 0 6 0 +- 11 1 +- 8 5 8834 5 Oct 05 19:51 LAG1 8 0 53 -22 +- 22 16 +- 10 3 8834 5 Oct 05 23:25 LAG1 8 0 53 -36 +- 32 13 +- 23 3 8834 6 Oct 05 01:01 LAG2 13 0 19 -9 +- 29 13 +- 15 8 8834 6 Oct 05 02:55 LAG1 5 0 17 -10 +- 19 7 +- 8 5 8834 6 Oct 05 05:15 LAG2 5 0 10 13 +- 154 -1 +- 79 2 8834 6 Oct 05 06:34 LAG1 7 0 17 -17 +- 15 2 +- 27 2 8834 6 Oct 05 08:51 LAG2 7 0 17 0 +- 41 13 +- 32 1 8834 6 Oct 05 15:15 LAG1 8 0 8 -2 +- 39 -3 +- 39 4 8834 6 Oct 05 18:29 LAG1 17 0 13 -8 +- 10 -5 +- 4 4 8834 6 Oct 05 22:15 LAG1 9 0 13 -12 +- 19 0 +- 10 4 8834 6 Oct 05 23:03 LAG2 4 0 19 -1 +- 24 -12 +- 17 1 8834 7 Oct 05 01:33 LAG1 6 0 9 3 +- 21 4 +- 14 8 8834 7 Oct 05 03:07 LAG2 13 0 11 -2 +- 22 -1 +- 13 10 8834 7 Oct 05 05:01 LAG1 19 0 12 -6 +- 9 -3 +- 6 8 8834 7 Oct 05 06:58 LAG2 14 0 6 -4 +- 11 0 +- 9 4 8834 7 Oct 05 11:05 LAG2 6 0 30 -18 +- 23 -23 +- 40 2 8834 7 Oct 05 17:29 LAG1 4 0 11 8 +- 40 1 +- 43 7 8834 7 Oct 05 20:53 LAG1 5 0 10 9 +- 23 11 +- 28 7 8834 8 Oct 05 00:32 LAG1 6 0 13 -25 +- 72 7 +- 38 3 8834 8 Oct 05 00:49 LAG2 4 0 2 35 +- 398 14 +- 170 1 8834 8 Oct 05 03:39 LAG1 2 0 8 24 +- 952 14 +- 416 0 8834 8 Oct 05 05:21 LAG2 6 0 13 -3 +- 48 13 +- 40 3 8834 8 Oct 05 09:17 LAG2 2 0 7 -2 +- 50 77 +- 702 0 8834 8 Oct 05 15:54 LAG1 8 0 6 3 +- 14 2 +- 21 5 8834 8 Oct 05 19:37 LAG1 2 0 17 27 +- 106 27 +- 274 0 8834 8 Oct 05 22:47 LAG1 10 0 6 2 +- 32 3 +- 18 5 8834 8 Oct 05 23:23 LAG2 5 0 17 13 +- 57 3 +- 57 3 -------------------------------------------------------------------------------- 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 050112 - 051007 0/ 15/ 0 0/ 16/ 0 31 1831 LVIL 050117 - 051009 0/ 69/ 0 0/ 30/ 0 99 1864 MD2LAS 050110 - 051006 0/128/ 0 0/ 58/ 0 186 1873 SIMLAS 050316 - 051009 0/ 60/ 0 0/ 21/ 0 81 1884 RIGLAS 050104 - 051008 0/ 81/ 0 3/ 46/ 3 133 1893 CRMLAS 050723 - 051007 0/ 14/ 0 0/ 0/ 0 14 6405 TIGO 050104 - 051007 17/ 24/ 2 16/ 39/ 4 102 6810 ZIMLAT 050101 - 051009 251/203/ 29 243/ 94/ 22 842 7080 MLRS25 050101 - 051005 39/ 88/ 4 27/ 76/ 10 244 7090 ML0514 050101 - 051008 158/417/ 42 134/374/ 32 1157 7105 ML0725 050108 - 051006 13/ 82/ 9 28/ 77/ 9 218 7110 ML0414 050118 - 051008 100/180/ 30 72/130/ 14 526 7124 ML0819 050118 - 051008 1/ 40/ 1 1/ 30/ 1 74 7130 TL04** 050803 - 050922 7/ 23/ 1 12/ 10/ 2 55 7231 WUHA01 051008 - 051008 0/ 1/ 0 0/ 1/ 0 2 7237 CHALAS 050102 - 051008 0/105/ 2 0/ 85/ 0 192 7249 BEJLAS 050101 - 051008 0/ 94/ 0 0/ 78/ 0 172 7308 CRLLAS 050111 - 050510 7/ 5/ 1 1/ 10/ 0 24 7355 TROS02 050603 - 050906 0/ 46/ 0 0/ 7/ 0 53 7358 GMSL 050802 - 050915 0/ 10/ 0 2/ 1/ 0 13 7405 TIGO 050105 - 050926 5/ 30/ 0 3/ 16/ 0 54 7501 ML0616 050117 - 051003 51/128/ 6 41/125/ 7 358 7806 METLAS 050301 - 050301 0/ 0/ 0 0/ 1/ 0 1 7810 ZIMLAT 050101 - 051009 228/201/ 28 237/ 87/ 22 803 7811 POLLAS 050111 - 051008 0/102/ 0 0/ 47/ 0 149 7824 SPNLAS 050108 - 051008 10/157/ 4 8/105/ 6 290 7825 STL3 050101 - 051006 338/361/ 42 215/312/ 33 1301 7832 SALRO 050101 - 051009 121/266/ 27 164/226/ 25 829 7835 GRASSE 050104 - 050705 0/ 32/ 2 0/ 33/ 3 70 7837 CHILAS 050102 - 050414 0/ 22/ 0 0/ 40/ 1 63 7838 SHOLAS 050106 - 051007 48/100/ 3 40/ 84/ 6 281 7839 AUSLAS 050103 - 050926 179/164/ 24 148/106/ 15 636 7840 RGOLAS 050102 - 051009 218/187/ 35 189/105/ 25 759 7841 GFZLA3 050105 - 051008 51/ 82/ 14 21/ 66/ 9 243 7848 FTLR06 050515 - 051008 6/ 43/ 2 4/ 15/ 3 73 7941 MLROnn 050102 - 051005 65/144/ 10 103/104/ 21 447 8834 WLRS01 050109 - 051009 201/196/ 35 203/125/ 23 783 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 051002.0 58.6 +/- 0.1 417.4 +/- 0.1 -32658.65 +/- 0.02 051003.0 58.7 +/- 0.1 416.9 +/- 0.1 -32659.58 +/- 0.02 051004.0 59.1 +/- 0.1 416.1 +/- 0.1 -32660.60 +/- 0.03 051005.0 60.5 +/- 0.1 415.9 +/- 0.1 -32661.46 +/- 0.04 051006.0 62.0 +/- 0.1 416.2 +/- 0.1 -32662.27 +/- 0.05 051007.0 63.5 +/- 0.1 415.7 +/- 0.1 -32662.86 +/- 0.05 051008.0 63.7 +/- 0.1 415.4 +/- 0.1 -32663.36 +/- 0.06 -------------------------------------------------------------- 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, 2003, 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 syste 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 ******************************************************************************** |