| Date: | 2004-09-21 07:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4338: Delft QL Report September 21, 2004 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2004-09-21 07:15:00 UTC Message No. 4338 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report September 21, 2004 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS September 21, 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, Sep 20, 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, Sep 20, 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 040915 - 040920 7 6 1831 Lviv, Ukraine 040917 - 040918 1 2 1864 Maidanak, Uzbekistan (site 2) 040912 - 040916 5 1 1884 Riga, Latvia 040913 - 040918 4 - 1893 Kazivili, Crimea, Ukraine 040913 - 040919 8 6 6810 Zimmerwald 846, Switzerland 040913 - 040920 13 12 7080 McDonald Obs., Fort Davis, TX 040914 - 040918 5 8 7090 Yarragadee, Australia 040913 - 040919 15 9 7105 Greenbelt, Maryland 040913 - 040920 5 6 7110 Monument Peak, California 040913 - 040919 14 15 7124 Papeete, Tahiti 040914 - 040918 4 - 7231 Wuhan, China (new) 040915 - 040917 2 5 7237 Changchun, China 040913 - 040919 3 5 7249 Beijing, China 040918 - 040919 1 3 7501 Hartebeesthoek, SA (MOB-6) 040920 - 040920 - 1 7810 Zimmerwald 423, Switzerland 040913 - 040920 13 12 7811 Borowiec, Poland 040913 - 040918 5 6 7824 San Fernando, Spain 040913 - 040919 8 7 7825 Mount Stromlo, Australia 040917 - 040917 1 - 7832 Riyad, Saudi Arabia 040913 - 040920 15 15 7837 Shanghai Observatory, China 040914 - 040917 1 1 7838 Simosato Observatory, Japan 040913 - 040918 7 10 7839 Graz, Austria 040910 - 040918 19 12 7841 Potsdam, Germany 040913 - 040914 2 1 7845 Grasse, France (LLR) 040913 - 040920 5 3 8834 Wettzell, Germany 040913 - 040919 16 13 ------ ------ --- --- TOTAL 040910 - 040920 179 159 ------------------------------------------------------------------------------ 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, Sep 11, 2004 to Sun, Sep 19, 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 26 24 Number of Passes 193/192 199/198 Number of Normal Points 1988/1968 2414/2402 Weighted RMS of Fit (mm) 14 15 ----------------------------------------------------------------------- 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 15 Sep 04 17:55 LAG1 3 0 112 -1915 +-6570 -800 +-2681 9 1824 15 Sep 04 19:41 LAG2 2 0 592 -408 +-4032 272 +-5945 0 1824 15 Sep 04 21:45 LAG1 9 0 210 -257 +- 255 212 +- 332 62 1824 17 Sep 04 18:41 LAG1 10 0 191 -138 +- 244 3 +- 124 127 1824 17 Sep 04 19:47 LAG2 4 0 119 -460 +-2169 -244 +-1494 11 1824 17 Sep 04 22:31 LAG1 5 0 323 399 +- 585 154 +-1032 9 1824 17 Sep 04 23:49 LAG2 3 0 218 -694 +-4930 -501 +-2728 3 1824 18 Sep 04 17:17 LAG1 8 0 288 -158 +-1213 -176 +- 519 129 1824 18 Sep 04 17:47 LAG2 6 0 189 -881 +-1382 -444 +- 805 23 1824 18 Sep 04 20:59 LAG1 11 0 188 215 +- 207 99 +- 188 18 1824 18 Sep 04 21:51 LAG2 7 0 178 -498 +- 705 -268 +- 417 75 Station 1831 (Lviv) (position fixed, acc. 400 mm) 1831 11 Sep 04 01:04 LAG2 11 0 94 35 +- 403 118 +- 453 4 1831 11 Sep 04 19:03 LAG2 15 0 43 23 +- 311 17 +- 264 28 1831 11 Sep 04 20:21 LAG1 1 0 49 0 +- 0 0 +- 0 0 1831 17 Sep 04 19:40 LAG2 16 0 62 33 +- 301 34 +- 233 34 1831 18 Sep 04 20:59 LAG1 17 0 142 22 +- 291 -103 +- 216 24 1831 18 Sep 04 21:51 LAG2 20 0 139 43 +- 268 95 +- 201 28 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 11 Sep 04 15:07 LAG2 6 0 16 0 +- 245 1 +- 123 16 1864 11 Sep 04 16:07 LAG1 10 0 34 39 +- 296 12 +- 195 20 1864 11 Sep 04 23:23 LAG2 4 0 30 -262 +-4642 -147 +-2377 5 1864 12 Sep 04 18:25 LAG1 7 0 19 16 +- 249 -8 +- 148 8 1864 13 Sep 04 17:21 LAG1 4 0 19 -16 +-2876 14 +-1372 13 1864 14 Sep 04 15:31 LAG1 10 0 37 22 +- 242 -10 +- 162 14 1864 14 Sep 04 17:31 LAG2 10 0 18 -9 +- 200 -4 +- 120 13 1864 15 Sep 04 17:49 LAG1 7 0 17 16 +- 244 4 +- 227 8 1864 16 Sep 04 16:48 LAG1 2 0 5 -73 +-9999 39 +-5179 0 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 11 Sep 04 01:05 LAG2 7 0 15 -17 +- 135 -10 +- 193 2 1884 13 Sep 04 20:54 LAG1 7 0 6 -4 +- 117 3 +- 141 2 1884 17 Sep 04 18:59 LAG1 10 0 9 0 +- 99 6 +- 96 6 1884 18 Sep 04 17:36 LAG1 11 0 6 5 +- 100 -2 +- 75 4 1884 18 Sep 04 21:15 LAG1 5 0 32 -32 +- 134 -1 +- 337 5 Station 1893 (Kazivili) (position fixed, acc. 100 mm) 1893 12 Sep 04 17:11 LAG2 8 0 18 -16 +- 156 -4 +- 166 13 1893 12 Sep 04 21:11 LAG2 12 0 29 42 +- 158 21 +- 121 16 1893 13 Sep 04 17:08 LAG1 10 0 67 -17 +- 134 29 +- 108 44 1893 13 Sep 04 20:45 LAG1 7 0 20 23 +- 163 29 +- 195 10 1893 14 Sep 04 17:43 LAG2 8 0 76 -76 +- 419 7 +- 238 40 1893 14 Sep 04 21:27 LAG2 14 0 34 32 +- 93 -2 +- 80 7 1893 15 Sep 04 17:55 LAG1 7 0 37 6 +- 346 26 +- 211 6 1893 15 Sep 04 19:35 LAG2 7 0 27 55 +- 247 54 +- 262 9 1893 15 Sep 04 21:35 LAG1 3 0 12 74 +-1093 74 +-1147 2 1893 17 Sep 04 18:41 LAG1 9 0 41 -24 +- 225 10 +- 139 11 1893 17 Sep 04 20:07 LAG2 7 0 16 41 +- 367 -29 +- 297 9 1893 18 Sep 04 17:23 LAG1 7 0 15 27 +- 281 11 +- 200 6 1893 18 Sep 04 17:57 LAG2 10 0 36 35 +- 145 -21 +- 110 28 1893 18 Sep 04 20:59 LAG1 4 0 36 116 +- 531 110 +- 503 14 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 11 Sep 04 13:00 LAG1 17 0 17 -17 +- 51 0 +- 29 3 6810 12 Sep 04 15:09 LAG1 16 0 15 -15 +- 51 0 +- 34 3 6810 12 Sep 04 16:55 LAG2 22 0 23 -21 +- 39 -4 +- 27 3 6810 12 Sep 04 18:33 LAG1 21 0 23 -21 +- 39 -3 +- 22 4 6810 12 Sep 04 20:53 LAG2 25 0 23 -22 +- 36 2 +- 23 2 6810 12 Sep 04 22:03 LAG1 21 0 20 -20 +- 39 -2 +- 22 3 6810 13 Sep 04 00:59 LAG2 28 0 19 -17 +- 34 -5 +- 20 4 6810 13 Sep 04 05:13 LAG2 13 0 33 -34 +- 51 3 +- 75 2 6810 13 Sep 04 10:17 LAG1 10 0 10 21 +- 170 14 +- 91 1 6810 13 Sep 04 13:53 LAG1 18 0 26 -21 +- 43 9 +- 27 2 6810 13 Sep 04 15:20 LAG2 8 0 20 -20 +- 64 -6 +- 147 4 6810 13 Sep 04 19:19 LAG2 14 0 17 -19 +- 81 1 +- 49 2 6810 16 Sep 04 21:35 LAG2 17 0 33 -25 +- 53 -8 +- 38 2 6810 16 Sep 04 23:49 LAG1 16 0 16 -11 +- 45 -14 +- 49 2 6810 17 Sep 04 01:27 LAG2 27 0 15 -8 +- 35 -7 +- 21 5 6810 17 Sep 04 15:31 LAG1 6 0 9 -8 +- 85 0 +- 47 4 6810 17 Sep 04 15:35 LAG2 11 0 25 -18 +- 59 18 +- 43 3 6810 17 Sep 04 18:49 LAG1 15 0 12 -10 +- 47 -3 +- 27 5 6810 17 Sep 04 19:25 LAG2 27 0 14 -7 +- 35 6 +- 20 6 6810 17 Sep 04 22:17 LAG1 23 0 12 7 +- 38 -4 +- 23 6 6810 17 Sep 04 23:31 LAG2 29 0 9 -1 +- 33 0 +- 20 9 6810 18 Sep 04 03:45 LAG2 17 0 14 14 +- 45 -3 +- 43 3 6810 18 Sep 04 10:30 LAG1 7 0 34 -8 +- 201 14 +- 113 6 6810 18 Sep 04 14:03 LAG1 14 0 16 -16 +- 52 0 +- 30 3 6810 18 Sep 04 17:30 LAG1 11 0 17 14 +- 55 -3 +- 36 6 6810 18 Sep 04 17:36 LAG2 16 0 9 -8 +- 51 5 +- 29 3 6810 18 Sep 04 20:55 LAG1 12 0 9 2 +- 52 -4 +- 32 4 6810 18 Sep 04 21:35 LAG2 18 0 13 -9 +- 44 -6 +- 26 3 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 11 Sep 04 04:12 LAG2 13 0 5 4 +- 21 0 +- 14 3 7080 11 Sep 04 04:57 LAG1 9 0 16 20 +- 47 -2 +- 28 2 7080 11 Sep 04 08:27 LAG2 19 0 10 -10 +- 15 2 +- 12 4 7080 11 Sep 04 12:33 LAG2 16 0 18 -1 +- 16 17 +- 15 4 7080 12 Sep 04 06:23 LAG2 18 0 6 0 +- 15 -5 +- 16 2 7080 12 Sep 04 07:03 LAG1 14 0 6 -5 +- 24 6 +- 19 1 7080 12 Sep 04 10:33 LAG2 9 0 11 -14 +- 84 -1 +- 50 1 7080 14 Sep 04 16:41 LAG1 6 0 6 -9 +- 100 -9 +- 73 3 7080 14 Sep 04 20:16 LAG1 9 0 19 17 +- 22 -3 +- 26 6 7080 15 Sep 04 00:41 LAG2 9 0 11 11 +- 25 -1 +- 30 2 7080 15 Sep 04 23:03 LAG2 5 0 33 8 +- 193 18 +- 136 2 7080 16 Sep 04 03:11 LAG2 3 0 15 160 +- 782 -79 +- 419 4 7080 16 Sep 04 04:57 LAG1 15 0 10 9 +- 17 2 +- 10 3 7080 16 Sep 04 06:59 LAG2 19 0 4 0 +- 16 -2 +- 13 3 7080 16 Sep 04 11:07 LAG2 17 0 6 -2 +- 16 5 +- 14 2 7080 17 Sep 04 03:36 LAG1 12 0 17 14 +- 19 -6 +- 11 3 7080 17 Sep 04 04:55 LAG2 15 0 7 4 +- 18 -6 +- 17 2 7080 17 Sep 04 09:23 LAG2 15 0 13 -13 +- 25 0 +- 18 3 7080 18 Sep 04 05:49 LAG1 5 0 6 0 +- 87 5 +- 76 0 7080 18 Sep 04 07:18 LAG2 1 0 27 0 +- 0 0 +- 0 0 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 11 Sep 04 06:55 LAG2 10 0 11 -13 +- 16 10 +- 16 2 7090 11 Sep 04 15:15 LAG1 15 0 6 -5 +- 10 0 +- 5 2 7090 12 Sep 04 08:49 LAG2 15 0 10 -7 +- 10 -4 +- 6 4 7090 12 Sep 04 17:22 LAG1 22 0 18 14 +- 8 -6 +- 5 1 7090 13 Sep 04 16:03 LAG1 21 0 3 1 +- 9 0 +- 4 2 7090 13 Sep 04 20:01 LAG1 1 0 26 0 +- 0 0 +- 0 0 7090 13 Sep 04 20:29 LAG2 24 0 12 -7 +- 8 7 +- 5 2 7090 13 Sep 04 22:59 LAG1 7 0 14 -15 +- 20 4 +- 32 4 7090 14 Sep 04 01:04 LAG2 3 0 17 -16 +- 156 0 +- 141 0 7090 14 Sep 04 09:13 LAG2 13 0 11 4 +- 13 -11 +- 12 1 7090 14 Sep 04 14:39 LAG1 2 0 29 18 +- 767 -4 +- 306 0 7090 14 Sep 04 21:39 LAG1 5 0 8 1 +- 29 -13 +- 62 4 7090 15 Sep 04 01:13 LAG1 7 0 18 -26 +- 72 4 +- 35 2 7090 15 Sep 04 03:21 LAG2 7 0 14 -6 +- 60 -6 +- 49 3 7090 15 Sep 04 16:47 LAG1 11 0 9 4 +- 14 3 +- 6 6 7090 15 Sep 04 20:57 LAG2 13 0 12 -11 +- 12 7 +- 10 3 7090 15 Sep 04 23:51 LAG1 3 0 7 -16 +- 107 10 +- 118 0 7090 16 Sep 04 01:27 LAG2 4 0 20 9 +- 263 -16 +- 150 6 7090 16 Sep 04 09:20 LAG2 15 0 11 2 +- 13 -8 +- 9 3 7090 16 Sep 04 15:29 LAG1 16 0 13 -14 +- 11 -6 +- 7 1 7090 16 Sep 04 19:03 LAG1 4 0 16 14 +- 101 -2 +- 89 0 7090 16 Sep 04 19:27 LAG2 3 0 16 -88 +- 330 69 +- 308 3 7090 17 Sep 04 14:18 LAG1 9 0 8 -8 +- 15 0 +- 9 3 7090 17 Sep 04 17:45 LAG1 15 0 9 -6 +- 11 -3 +- 8 2 7090 18 Sep 04 09:59 LAG2 6 0 10 46 +- 140 -31 +- 82 4 7090 18 Sep 04 12:57 LAG1 7 0 8 -8 +- 16 -8 +- 40 1 7090 18 Sep 04 16:21 LAG1 14 0 4 -1 +- 11 -2 +- 6 1 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 13 Sep 04 00:27 LAG2 15 0 16 -8 +- 10 -6 +- 6 7 7105 13 Sep 04 02:05 LAG1 14 0 2 0 +- 14 0 +- 8 2 7105 13 Sep 04 04:36 LAG2 23 0 10 -7 +- 8 -3 +- 6 4 7105 13 Sep 04 05:39 LAG1 10 0 24 -25 +- 13 14 +- 21 2 7105 13 Sep 04 08:39 LAG2 6 0 26 20 +- 201 21 +- 94 4 7105 14 Sep 04 00:33 LAG1 7 0 5 -4 +- 15 -1 +- 8 2 7105 14 Sep 04 02:47 LAG2 12 0 11 -10 +- 13 2 +- 10 7 7105 14 Sep 04 04:02 LAG1 13 0 9 3 +- 12 0 +- 8 8 7105 14 Sep 04 06:53 LAG2 5 0 16 -13 +- 26 0 +- 23 9 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 11 Sep 04 04:31 LAG2 3 0 7 -41 +- 513 29 +- 312 2 7110 11 Sep 04 04:43 LAG1 10 0 5 3 +- 14 0 +- 8 4 7110 12 Sep 04 02:17 LAG2 2 0 17 -7 +- 294 -34 +- 400 0 7110 12 Sep 04 03:31 LAG1 14 0 16 15 +- 11 -1 +- 8 6 7110 12 Sep 04 06:09 LAG2 11 0 7 -2 +- 14 -7 +- 12 2 7110 12 Sep 04 07:02 LAG1 4 0 20 -8 +- 73 12 +- 71 0 7110 13 Sep 04 18:17 LAG1 2 0 19 5 +- 125 87 +- 444 0 7110 13 Sep 04 21:39 LAG1 12 0 7 -5 +- 12 -2 +- 9 4 7110 14 Sep 04 02:15 LAG2 2 0 1 -77 +-3738 -33 +-1623 0 7110 14 Sep 04 04:13 LAG1 10 0 8 6 +- 13 -2 +- 6 1 7110 14 Sep 04 06:27 LAG2 13 0 6 2 +- 12 -4 +- 12 2 7110 14 Sep 04 07:47 LAG1 14 0 11 -8 +- 11 -4 +- 9 2 7110 14 Sep 04 10:36 LAG2 17 0 16 -7 +- 10 -6 +- 5 6 7110 14 Sep 04 20:21 LAG1 8 0 16 11 +- 15 -10 +- 18 2 7110 15 Sep 04 03:17 LAG1 5 0 18 -11 +- 102 -3 +- 64 1 7110 15 Sep 04 04:29 LAG2 17 0 3 -1 +- 10 1 +- 8 2 7110 15 Sep 04 06:17 LAG1 10 0 5 -4 +- 13 0 +- 6 1 7110 15 Sep 04 08:49 LAG2 17 0 9 -7 +- 10 -1 +- 7 3 7110 15 Sep 04 12:55 LAG2 5 0 13 0 +- 61 13 +- 61 1 7110 15 Sep 04 19:07 LAG1 5 0 19 -4 +- 26 13 +- 16 3 7110 16 Sep 04 04:57 LAG1 15 0 5 0 +- 11 2 +- 5 2 7110 16 Sep 04 06:45 LAG2 9 0 7 -6 +- 14 0 +- 19 3 7110 16 Sep 04 08:55 LAG1 3 0 21 -12 +- 161 -12 +- 250 5 7110 16 Sep 04 11:21 LAG2 9 0 12 -18 +- 40 5 +- 25 3 7110 17 Sep 04 03:43 LAG1 7 0 10 7 +- 16 -4 +- 10 4 7110 17 Sep 04 05:11 LAG2 3 0 10 -10 +- 158 0 +- 151 1 7110 17 Sep 04 07:09 LAG1 7 0 11 -9 +- 15 2 +- 8 3 7110 17 Sep 04 09:09 LAG2 8 0 17 -20 +- 18 -5 +- 21 2 7110 17 Sep 04 13:09 LAG2 6 0 3 5 +- 45 9 +- 55 2 7110 18 Sep 04 02:41 LAG1 3 0 7 -4 +- 53 7 +- 40 1 7110 18 Sep 04 03:02 LAG2 13 0 4 3 +- 21 -2 +- 16 3 7110 18 Sep 04 05:43 LAG1 13 0 18 0 +- 11 8 +- 5 3 7110 18 Sep 04 07:00 LAG2 8 0 16 -19 +- 18 -15 +- 16 1 7110 18 Sep 04 11:17 LAG2 15 0 6 0 +- 11 0 +- 9 5 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 11 Sep 04 07:56 LAG1 4 0 15 55 +- 192 20 +- 95 0 7124 14 Sep 04 11:05 LAG1 6 0 20 -19 +- 17 -14 +- 32 3 7124 15 Sep 04 09:31 LAG1 9 0 2 -5 +- 42 -3 +- 22 1 7124 16 Sep 04 08:15 LAG1 9 0 19 17 +- 14 -4 +- 10 2 7124 18 Sep 04 09:06 LAG1 2 0 1 15 +- 339 10 +- 221 0 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 15 Sep 04 12:01 LAG2 9 0 11 -5 +- 85 11 +- 86 7 7231 15 Sep 04 14:03 LAG1 15 0 39 -36 +- 46 28 +- 29 5 7231 15 Sep 04 16:31 LAG2 5 0 38 39 +- 455 -61 +- 364 5 7231 16 Sep 04 12:53 LAG1 9 2 1254 1247 +- 178 4 +- 109 25*CHK* 7231 16 Sep 04 13:57 LAG2 13 2 40 -19 +- 49 -23 +- 51 18 7231 17 Sep 04 12:13 LAG2 8 0 11 9 +- 64 -8 +- 100 7 7231 17 Sep 04 16:29 LAG2 3 0 103 -344 +- 436 -660 +- 716 39 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 11 Sep 04 11:25 LAG2 21 0 26 25 +- 33 -2 +- 19 7 7237 11 Sep 04 12:27 LAG1 14 0 23 13 +- 44 7 +- 24 6 7237 13 Sep 04 11:37 LAG2 21 0 20 16 +- 33 -7 +- 20 7 7237 13 Sep 04 13:07 LAG1 14 0 31 11 +- 43 18 +- 24 7 7237 13 Sep 04 15:51 LAG2 16 0 17 2 +- 39 -10 +- 25 5 7237 18 Sep 04 10:29 LAG2 14 0 32 3 +- 75 -19 +- 43 8 7237 18 Sep 04 13:27 LAG1 6 0 10 7 +- 231 7 +- 142 8 7237 18 Sep 04 14:45 LAG2 13 0 25 -29 +- 131 3 +- 76 9 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 11 Sep 04 12:29 LAG1 12 0 18 10 +- 44 8 +- 38 13 7249 11 Sep 04 15:41 LAG2 12 0 21 -19 +- 45 8 +- 55 8 7249 11 Sep 04 19:49 LAG2 12 0 20 12 +- 45 -11 +- 46 13 7249 18 Sep 04 13:27 LAG1 13 0 52 13 +- 42 15 +- 27 44 7249 18 Sep 04 14:29 LAG2 12 0 14 -6 +- 68 9 +- 53 11 7249 18 Sep 04 18:51 LAG2 3 0 5 25 +- 601 -31 +- 644 1 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 11 Sep 04 13:00 LAG1 17 0 11 -12 +- 48 -2 +- 27 4 7810 12 Sep 04 15:09 LAG1 17 0 11 -11 +- 47 -1 +- 31 3 7810 12 Sep 04 16:55 LAG2 19 0 15 -14 +- 42 -3 +- 29 2 7810 12 Sep 04 18:33 LAG1 22 0 20 -18 +- 39 -3 +- 21 2 7810 12 Sep 04 20:53 LAG2 26 0 14 -14 +- 35 0 +- 22 2 7810 12 Sep 04 22:03 LAG1 22 0 14 -12 +- 39 -2 +- 21 3 7810 13 Sep 04 00:59 LAG2 28 0 15 -9 +- 34 -6 +- 19 4 7810 13 Sep 04 05:13 LAG2 14 0 25 -24 +- 50 -1 +- 67 2 7810 13 Sep 04 10:17 LAG1 11 0 10 15 +- 134 12 +- 75 3 7810 13 Sep 04 13:53 LAG1 17 0 25 -19 +- 44 9 +- 29 2 7810 13 Sep 04 15:21 LAG2 7 0 10 -9 +- 69 4 +- 179 1 7810 13 Sep 04 19:19 LAG2 13 0 11 -12 +- 82 0 +- 52 1 7810 16 Sep 04 21:35 LAG2 17 0 28 -15 +- 53 -11 +- 38 3 7810 16 Sep 04 23:49 LAG1 17 0 15 -2 +- 44 -15 +- 45 2 7810 17 Sep 04 01:27 LAG2 29 0 17 -2 +- 33 -9 +- 20 5 7810 17 Sep 04 15:31 LAG1 5 0 6 -5 +- 87 0 +- 52 3 7810 17 Sep 04 15:35 LAG2 10 0 23 -12 +- 60 17 +- 45 1 7810 17 Sep 04 18:49 LAG1 14 0 9 -9 +- 50 -1 +- 30 2 7810 17 Sep 04 19:25 LAG2 23 0 17 -4 +- 38 8 +- 21 6 7810 17 Sep 04 22:17 LAG1 22 0 10 4 +- 39 -4 +- 24 6 7810 17 Sep 04 23:33 LAG2 29 0 6 -2 +- 34 -1 +- 20 6 7810 18 Sep 04 03:45 LAG2 18 0 15 14 +- 45 -8 +- 40 4 7810 18 Sep 04 10:29 LAG1 8 0 42 0 +- 239 20 +- 115 3 7810 18 Sep 04 14:03 LAG1 15 0 15 -15 +- 48 -2 +- 27 2 7810 18 Sep 04 17:29 LAG1 15 0 16 14 +- 47 -1 +- 29 7 7810 18 Sep 04 17:31 LAG2 15 0 12 -6 +- 48 6 +- 28 3 7810 18 Sep 04 20:51 LAG1 13 0 5 -1 +- 54 -1 +- 29 4 7810 18 Sep 04 21:35 LAG2 19 0 15 -10 +- 42 -7 +- 25 5 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 13 Sep 04 20:49 LAG1 15 0 17 16 +- 47 -1 +- 35 6 7811 13 Sep 04 23:17 LAG2 18 0 23 21 +- 43 1 +- 34 9 7811 15 Sep 04 21:59 LAG1 6 0 3 -2 +- 388 2 +- 230 2 7811 15 Sep 04 23:54 LAG2 4 0 30 50 +- 387 -14 +- 265 4 7811 16 Sep 04 20:14 LAG1 13 0 23 18 +- 51 -10 +- 34 7 7811 16 Sep 04 21:35 LAG2 18 0 23 18 +- 43 -9 +- 32 8 7811 17 Sep 04 01:43 LAG2 14 0 30 27 +- 49 -11 +- 50 9 7811 17 Sep 04 18:51 LAG1 11 0 22 20 +- 57 -2 +- 41 11 7811 17 Sep 04 19:43 LAG2 15 0 33 24 +- 50 8 +- 39 13 7811 17 Sep 04 22:30 LAG1 7 0 27 23 +- 77 4 +- 82 10 7811 17 Sep 04 23:46 LAG2 7 0 59 71 +- 137 13 +- 120 8 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 11 Sep 04 23:57 LAG1 3 0 76 173 +- 762 -46 +- 363 2 7824 12 Sep 04 20:55 LAG2 3 0 51 72 +- 920 14 +- 632 2 7824 13 Sep 04 01:09 LAG2 4 0 75 85 +- 313 7 +- 246 3 7824 13 Sep 04 20:53 LAG1 13 0 63 63 +- 40 0 +- 29 4 7824 13 Sep 04 23:12 LAG2 7 0 59 66 +- 75 13 +- 113 1 7824 14 Sep 04 19:39 LAG1 8 0 32 39 +- 66 -10 +- 67 2 7824 14 Sep 04 21:38 LAG2 4 0 59 94 +- 887 -19 +- 481 5 7824 14 Sep 04 23:19 LAG1 6 0 46 142 +- 349 -47 +- 168 1 7824 15 Sep 04 01:53 LAG2 6 0 57 137 +- 441 -43 +- 236 1 7824 16 Sep 04 01:31 LAG1 2 0 42 -15 +-1652 66 +-1891 0 7824 16 Sep 04 20:14 LAG1 16 0 46 48 +- 32 -11 +- 21 3 7824 16 Sep 04 21:26 LAG2 8 0 60 57 +- 48 -9 +- 74 3 7824 17 Sep 04 00:09 LAG1 7 0 21 93 +- 323 -39 +- 164 6 7824 17 Sep 04 01:39 LAG2 5 0 84 75 +- 262 -6 +- 199 3 7824 17 Sep 04 22:21 LAG1 5 0 77 108 +- 289 18 +- 164 3 7824 18 Sep 04 21:05 LAG1 2 0 80 53 +-1767 -20 +-1327 0 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 17 Sep 04 13:53 LAG1 18 1 5 -1 +- 12 -1 +- 6 4 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 11 Sep 04 01:15 LAG2 11 0 7 -21 +- 62 -13 +- 37 3 7832 11 Sep 04 06:12 LAG1 6 0 8 4 +- 38 -8 +- 30 1 7832 11 Sep 04 15:11 LAG2 7 0 3 -5 +- 58 5 +- 51 2 7832 11 Sep 04 16:15 LAG1 8 0 11 8 +- 30 -5 +- 40 3 7832 11 Sep 04 19:23 LAG2 6 0 6 -9 +- 52 10 +- 47 1 7832 11 Sep 04 19:45 LAG1 8 0 6 -5 +- 23 0 +- 31 1 7832 11 Sep 04 23:19 LAG2 14 0 15 5 +- 31 -7 +- 21 2 7832 12 Sep 04 08:21 LAG1 4 0 3 8 +- 154 6 +- 111 2 7832 12 Sep 04 13:07 LAG2 5 0 25 20 +- 75 -5 +- 99 6 7832 12 Sep 04 17:03 LAG2 7 0 10 -28 +- 81 -18 +- 66 1 7832 12 Sep 04 18:09 LAG1 6 0 6 -19 +- 268 -10 +- 110 1 7832 12 Sep 04 21:27 LAG2 9 0 7 -4 +- 49 2 +- 55 2 7832 12 Sep 04 21:57 LAG1 10 0 6 5 +- 23 -1 +- 38 4 7832 13 Sep 04 01:27 LAG2 11 0 12 -20 +- 68 -17 +- 39 2 7832 13 Sep 04 07:19 LAG1 4 0 16 26 +- 275 -5 +- 149 2 7832 13 Sep 04 15:21 LAG2 14 0 7 -11 +- 37 8 +- 20 3 7832 13 Sep 04 16:57 LAG1 8 0 11 -7 +- 48 4 +- 39 2 7832 13 Sep 04 19:29 LAG2 10 0 16 -16 +- 20 -3 +- 46 2 7832 13 Sep 04 20:27 LAG1 11 0 9 10 +- 23 2 +- 22 2 7832 13 Sep 04 23:35 LAG2 11 0 5 4 +- 56 0 +- 36 2 7832 14 Sep 04 09:09 LAG1 5 0 9 2 +- 73 -5 +- 64 1 7832 14 Sep 04 13:19 LAG2 3 0 10 -49 +- 347 -48 +- 293 2 7832 14 Sep 04 15:51 LAG1 6 0 4 0 +- 33 2 +- 66 3 7832 14 Sep 04 17:17 LAG2 8 0 8 -21 +- 67 -19 +- 57 1 7832 14 Sep 04 19:03 LAG1 8 0 19 -15 +- 32 -16 +- 20 2 7832 14 Sep 04 21:43 LAG2 11 0 5 -7 +- 30 -8 +- 36 0 7832 15 Sep 04 01:43 LAG2 6 0 21 -20 +- 232 -22 +- 126 1 7832 15 Sep 04 07:41 LAG1 6 0 3 -7 +- 130 -5 +- 68 2 7832 15 Sep 04 15:19 LAG2 7 0 28 -15 +- 46 9 +- 31 3 7832 15 Sep 04 17:41 LAG1 6 0 29 -25 +- 130 1 +- 70 0 7832 18 Sep 04 07:17 LAG1 3 0 156 -426 +- 115 -437 +- 143 47*CHK* 7832 18 Sep 04 13:47 LAG2 8 0 7 -8 +- 27 -2 +- 35 1 7832 18 Sep 04 17:07 LAG1 8 0 27 32 +- 70 3 +- 43 3 7832 18 Sep 04 17:49 LAG2 7 0 15 -24 +- 81 -9 +- 81 1 7832 18 Sep 04 20:47 LAG1 11 0 4 3 +- 20 0 +- 24 3 7832 18 Sep 04 22:07 LAG2 12 0 14 -30 +- 43 -21 +- 33 4 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 11 Sep 04 11:21 LAG2 18 0 24 20 +- 36 -9 +- 28 6 7837 11 Sep 04 12:29 LAG1 12 0 7 -1 +- 52 -2 +- 41 6 7837 14 Sep 04 13:57 LAG2 12 0 63 -49 +- 45 -33 +- 56 9 7837 17 Sep 04 14:53 LAG1 11 0 8 3 +- 57 -6 +- 49 6 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 13 Sep 04 07:36 LAG2 23 0 11 7 +- 20 1 +- 13 7 7838 13 Sep 04 09:47 LAG1 9 0 25 24 +- 33 3 +- 43 5 7838 13 Sep 04 11:41 LAG2 25 0 26 18 +- 19 9 +- 13 5 7838 13 Sep 04 13:01 LAG1 23 0 24 7 +- 20 11 +- 10 3 7838 13 Sep 04 15:51 LAG2 26 0 21 21 +- 19 3 +- 13 3 7838 14 Sep 04 09:37 LAG2 29 0 23 22 +- 17 -2 +- 9 5 7838 14 Sep 04 11:39 LAG1 19 0 23 21 +- 22 -3 +- 13 4 7838 14 Sep 04 13:50 LAG2 28 0 37 36 +- 18 1 +- 13 3 7838 14 Sep 04 15:17 LAG1 17 0 21 19 +- 23 -10 +- 22 2 7838 17 Sep 04 08:25 LAG2 8 0 24 13 +- 90 7 +- 62 2 7838 17 Sep 04 11:10 LAG1 18 0 34 33 +- 23 2 +- 14 3 7838 17 Sep 04 12:07 LAG2 26 0 46 39 +- 18 13 +- 13 13 7838 17 Sep 04 14:41 LAG1 14 0 18 -2 +- 26 15 +- 24 6 7838 17 Sep 04 16:20 LAG2 16 0 56 42 +- 24 14 +- 13 8 7838 18 Sep 04 10:19 LAG2 22 0 32 38 +- 24 -11 +- 15 2 7838 18 Sep 04 13:23 LAG1 11 0 15 13 +- 29 5 +- 28 7 7838 18 Sep 04 14:23 LAG2 25 0 15 10 +- 19 8 +- 14 5 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 11 Sep 04 00:47 LAG2 23 0 1 0 +- 8 0 +- 4 1 7839 11 Sep 04 01:09 LAG1 8 0 12 9 +- 14 21 +- 39 0 7839 11 Sep 04 16:37 LAG1 6 0 7 -6 +- 18 3 +- 26 0 7839 11 Sep 04 18:45 LAG2 15 0 6 -5 +- 11 0 +- 5 2 7839 11 Sep 04 19:49 LAG1 8 0 3 -1 +- 76 -2 +- 33 1 7839 13 Sep 04 10:17 LAG1 11 0 7 12 +- 26 8 +- 15 2 7839 13 Sep 04 13:53 LAG1 16 0 14 -7 +- 10 8 +- 6 2 7839 13 Sep 04 15:09 LAG2 13 0 4 3 +- 11 2 +- 10 0 7839 13 Sep 04 17:07 LAG1 17 0 19 -13 +- 10 6 +- 5 1 7839 13 Sep 04 18:57 LAG2 21 0 7 -4 +- 9 2 +- 5 1 7839 13 Sep 04 20:51 LAG1 20 0 1 0 +- 12 0 +- 6 1 7839 13 Sep 04 23:05 LAG2 24 0 5 -1 +- 8 2 +- 4 2 7839 14 Sep 04 00:29 LAG1 12 0 4 2 +- 12 0 +- 19 3 7839 14 Sep 04 03:06 LAG2 25 0 4 -2 +- 8 0 +- 6 2 7839 14 Sep 04 09:05 LAG1 9 0 4 -1 +- 15 -2 +- 10 0 7839 14 Sep 04 12:27 LAG1 16 0 12 -1 +- 11 -8 +- 7 0 7839 14 Sep 04 16:01 LAG1 12 0 10 2 +- 12 -9 +- 10 0 7839 14 Sep 04 17:11 LAG2 19 0 11 -11 +- 9 -1 +- 5 2 7839 14 Sep 04 19:15 LAG1 16 0 31 -10 +- 10 -13 +- 5 4 7839 17 Sep 04 11:51 LAG1 16 0 7 -2 +- 10 2 +- 6 3 7839 17 Sep 04 15:17 LAG1 8 0 5 5 +- 16 1 +- 9 2 7839 17 Sep 04 15:31 LAG2 15 0 31 -3 +- 11 19 +- 6 1 7839 17 Sep 04 18:39 LAG1 20 0 3 -1 +- 9 -1 +- 4 1 7839 17 Sep 04 19:22 LAG2 19 0 12 0 +- 9 6 +- 5 4 7839 17 Sep 04 22:11 LAG1 25 0 16 13 +- 8 -2 +- 5 6 7839 17 Sep 04 23:31 LAG2 21 0 8 4 +- 9 -2 +- 4 6 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 11 Sep 04 19:13 LAG2 10 0 7 11 +- 62 -3 +- 36 2 7840 11 Sep 04 20:01 LAG1 19 0 11 4 +- 15 -5 +- 8 5 7840 11 Sep 04 22:48 LAG2 19 0 10 9 +- 15 0 +- 11 3 7840 11 Sep 04 23:47 LAG1 12 0 21 17 +- 26 3 +- 22 3 7840 12 Sep 04 02:53 LAG2 24 0 14 6 +- 13 -8 +- 8 3 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 11 Sep 04 01:12 LAG2 14 0 9 7 +- 22 -1 +- 14 7 7841 11 Sep 04 19:53 LAG1 16 0 6 1 +- 12 -1 +- 6 4 7841 11 Sep 04 23:05 LAG2 9 1 13 2 +- 16 -7 +- 13 7 7841 12 Sep 04 20:57 LAG2 10 0 7 -20 +- 54 -10 +- 29 5 7841 12 Sep 04 22:11 LAG1 15 0 7 3 +- 10 -3 +- 8 5 7841 13 Sep 04 01:13 LAG2 13 0 12 -1 +- 14 -7 +- 9 5 7841 13 Sep 04 19:09 LAG2 10 0 11 -6 +- 27 2 +- 20 7 7841 13 Sep 04 20:50 LAG1 18 0 8 0 +- 10 0 +- 6 8 7841 14 Sep 04 19:39 LAG1 5 1 27 -12 +- 37 -21 +- 52 6 Station 7845 (Grasse) (position fixed, acc. 20 mm) 7845 13 Sep 04 18:53 LAG2 31 0 20 5 +- 11 9 +- 6 2 7845 13 Sep 04 20:33 LAG1 25 0 18 2 +- 13 8 +- 6 3 7845 13 Sep 04 23:01 LAG2 29 0 15 5 +- 12 9 +- 7 3 7845 17 Sep 04 08:17 LAG1 21 0 17 17 +- 14 0 +- 10 5 7845 17 Sep 04 12:12 LAG1 12 0 8 9 +- 31 0 +- 14 4 7845 17 Sep 04 15:28 LAG1 15 0 14 13 +- 17 2 +- 13 2 7845 17 Sep 04 18:41 LAG1 16 0 5 5 +- 24 0 +- 13 3 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 11 Sep 04 00:49 LAG2 12 0 9 12 +- 34 10 +- 20 5 8834 11 Sep 04 01:24 LAG1 1 0 9 0 +- 0 0 +- 0 0 8834 11 Sep 04 23:23 LAG2 5 0 12 3 +- 48 -11 +- 37 2 8834 12 Sep 04 21:05 LAG2 8 0 10 -13 +- 38 -4 +- 30 5 8834 13 Sep 04 01:08 LAG2 10 0 9 -7 +- 15 -8 +- 13 3 8834 13 Sep 04 23:25 LAG2 14 0 5 0 +- 13 3 +- 10 3 8834 14 Sep 04 03:25 LAG2 3 0 5 3 +- 71 -2 +- 100 1 8834 14 Sep 04 08:57 LAG1 8 0 24 -27 +- 19 -4 +- 17 2 8834 14 Sep 04 12:45 LAG1 3 0 16 -15 +- 24 -14 +- 90 0 8834 15 Sep 04 23:35 LAG2 13 0 10 2 +- 12 7 +- 10 2 8834 16 Sep 04 03:37 LAG2 5 0 8 7 +- 32 0 +- 50 3 8834 16 Sep 04 09:49 LAG1 6 0 11 19 +- 51 20 +- 40 4 8834 16 Sep 04 13:25 LAG1 5 0 30 -27 +- 39 2 +- 40 4 8834 16 Sep 04 17:42 LAG2 6 0 23 -24 +- 20 3 +- 39 2 8834 16 Sep 04 21:45 LAG2 13 0 23 -14 +- 15 -8 +- 11 2 8834 17 Sep 04 00:15 LAG1 3 0 11 0 +- 247 -12 +- 256 0 8834 17 Sep 04 01:41 LAG2 14 0 12 4 +- 11 -9 +- 9 4 8834 17 Sep 04 05:38 LAG2 7 0 22 -22 +- 17 3 +- 34 4 8834 17 Sep 04 08:17 LAG1 6 0 2 5 +- 108 4 +- 68 2 8834 17 Sep 04 12:17 LAG1 3 0 13 -1 +- 95 -8 +- 67 2 8834 17 Sep 04 18:51 LAG1 7 0 14 -18 +- 37 -3 +- 24 3 8834 17 Sep 04 19:33 LAG2 6 0 29 -14 +- 115 7 +- 62 1 8834 17 Sep 04 22:35 LAG1 6 0 9 8 +- 17 -10 +- 36 2 8834 17 Sep 04 23:51 LAG2 4 0 2 2 +- 99 4 +- 102 2 8834 18 Sep 04 03:49 LAG2 6 0 9 3 +- 19 -8 +- 15 1 8834 18 Sep 04 07:08 LAG1 3 0 8 -6 +- 33 -13 +- 174 1 8834 18 Sep 04 10:47 LAG1 6 0 23 -23 +- 21 13 +- 10 2 8834 18 Sep 04 14:10 LAG1 2 0 25 -46 +- 231 -14 +- 163 0 8834 18 Sep 04 17:33 LAG1 9 0 7 5 +- 17 -1 +- 16 4 8834 18 Sep 04 17:52 LAG2 8 0 21 -22 +- 15 11 +- 19 2 8834 18 Sep 04 21:15 LAG1 8 0 14 0 +- 24 -9 +- 19 5 8834 18 Sep 04 22:13 LAG2 9 0 20 -24 +- 63 2 +- 35 5 -------------------------------------------------------------------------------- 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 - 040920 0/ 22/ 0 0/ 10/ 0 32 1831 LVIL 040815 - 040918 0/ 13/ 0 0/ 16/ 0 29 1863 MDNLAS 040103 - 040117 0/ 2/ 0 0/ 4/ 0 6 1864 MD2LAS 040102 - 040916 0/132/ 0 0/ 64/ 0 196 1868 KOMLAS 040315 - 040614 0/ 15/ 0 0/ 3/ 0 18 1873 SIMLAS 040118 - 040813 0/ 33/ 0 0/ 15/ 0 48 1884 RIGLAS 040310 - 040918 0/ 66/ 1 0/ 11/ 0 78 1893 CRMLAS 040331 - 040919 0/ 53/ 0 0/ 32/ 0 85 6405 TIGO 040103 - 040730 2/ 15/ 2 2/ 4/ 0 25 6810 ZIMLAT 040107 - 040920 154/199/ 27 133/124/ 16 653 7080 MLRS25 040104 - 040918 53/ 88/ 12 64/ 82/ 6 305 7090 ML0514 040101 - 040919 197/250/ 43 165/282/ 32 969 7105 ML0725 040104 - 040920 20/ 91/ 8 5/ 81/ 9 214 7110 ML0414 040102 - 040919 99/212/ 18 110/141/ 21 601 7124 ML0819 040315 - 040918 0/ 26/ 0 0/ 15/ 0 41 7210 HOLLAS 040105 - 040607 33/ 49/ 3 50/ 52/ 6 193 7231 WUHA01 040408 - 040917 0/ 4/ 0 0/ 11/ 0 15 7237 CHALAS 040101 - 040919 0/299/ 6 0/179/ 2 486 7249 BEJLAS 040101 - 040919 0/189/ 1 0/145/ 0 335 7308 CRLLAS 040106 - 040311 5/ 47/ 0 0/ 38/ 2 92 7355 TROS02 040509 - 040829 0/ 82/ 0 0/ 34/ 0 116 7358 GMSL 040901 - 040901 0/ 1/ 0 0/ 1/ 0 2 7405 TIGO 040103 - 040823 0/ 12/ 2 0/ 4/ 0 18 7501 ML0616 040106 - 040920 53/ 50/ 18 77/131/ 13 342 7806 METLAS 040720 - 040814 0/ 4/ 0 0/ 4/ 0 8 7810 ZIMLAT 040507 - 040920 162/112/ 23 117/ 66/ 15 495 7811 POLLAS 040105 - 040918 0/111/ 0 0/ 62/ 0 173 7823 FTLR** 040612 - 040626 0/ 9/ 0 1/ 1/ 1 12 7824 SPNLAS 040109 - 040919 0/119/ 0 0/ 73/ 1 193 7825 STL3 040807 - 040917 16/ 4/ 2 29/ 2/ 3 56 7830 FTLR** 030903 - 030903 0/ 0/ 0 0/ 1/ 0 1 7832 SALRO 040102 - 040920 106/275/ 23 179/251/ 33 867 7835 GRASSE 040301 - 040816 1/ 64/ 3 0/ 33/ 1 102 7836 GFZLAS 040105 - 040701 0/ 38/ 0 0/ 21/ 1 60 7837 CHILAS 040102 - 040917 0/ 64/ 0 0/ 73/ 1 138 7838 SHOLAS 040105 - 040918 23/189/ 2 46/147/ 8 415 7839 AUSLAS 040107 - 040918 102/184/ 27 67/130/ 15 525 7840 RGOLAS 040102 - 040912 132/221/ 39 111/126/ 19 648 7841 GFZLA3 040112 - 040914 25/100/ 16 15/ 68/ 10 234 7845 GRASLL 040318 - 040920 13/ 26/ 0 11/ 14/ 1 65 7941 MLROnn 040111 - 040802 102/141/ 22 102/102/ 9 478 8834 WLRS01 040108 - 040919 193/189/ 39 165/134/ 19 739 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 040912.0 176.0 +/- 0.1 473.0 +/- 0.1 -32504.16 +/- 0.02 040913.0 178.3 +/- 0.1 471.7 +/- 0.1 -32504.19 +/- 0.03 040914.0 179.6 +/- 0.1 468.8 +/- 0.1 -32504.53 +/- 0.04 040915.0 181.3 +/- 0.1 466.9 +/- 0.1 -32505.05 +/- 0.05 040916.0 182.2 +/- 0.2 464.1 +/- 0.1 -32505.75 +/- 0.05 040917.0 183.3 +/- 0.1 462.1 +/- 0.1 -32506.46 +/- 0.06 040918.0 185.1 +/- 0.1 459.4 +/- 0.1 -32507.06 +/- 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, 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 ******************************************************************************** |