| Date: | 2005-09-17 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6017: Delft QL Report September 17, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-09-17 13:15:00 UTC Message No. 6017 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report September 17, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS September 17, 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 Sat, Sep 17, 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 Sat, Sep 17, 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 ------------------------------------------------------------------------------ 1864 Maidanak, Uzbekistan (site 2) 050915 - 050915 1 - 1873 Simeiz, Crimea, Ukraine 050915 - 050916 2 - 6405 Concepcion, Chile (TIGO 847) 050915 - 050916 3 2 6810 Zimmerwald 846, Switzerland 050915 - 050916 4 4 7090 Yarragadee, Australia 050915 - 050916 3 4 7110 Monument Peak, California 050915 - 050916 3 2 7124 Papeete, Tahiti 050916 - 050916 1 - 7358 Tanegashima, Japan 050914 - 050915 3 1 7501 Hartebeesthoek, SA (MOB-6) 050915 - 050915 1 2 7810 Zimmerwald 423, Switzerland 050915 - 050916 4 4 7824 San Fernando, Spain 050915 - 050916 3 - 7825 Mount Stromlo, Australia 050915 - 050916 3 3 7832 Riyad, Saudi Arabia 050917 - 050917 2 1 7839 Graz, Austria 050914 - 050916 8 6 7840 Herstmonceux, United Kingdom 050916 - 050917 4 4 7848 Ajaccio, Corsica (FTLRS) 050916 - 050916 1 - 7941 Matera, Italy (MLRO 532) 050915 - 050917 4 2 8834 Wettzell, Germany 050915 - 050915 1 - ------ ------ --- --- TOTAL 050914 - 050917 51 35 ------------------------------------------------------------------------------ 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 Fri, Sep 9, 2005 to Sat, Sep 17, 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 27 25 Number of Passes 211/211 159/159 Number of Normal Points 2203/2197 1664/1651 Weighted RMS of Fit (mm) 15 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 1831 (Lviv) (position fixed, acc. 400 mm) 1831 9 Sep 05 20:11 LAG1 10 0 121 -125 +- 414 -11 +- 367 15 1831 9 Sep 05 23:37 LAG1 5 0 67 -205 +-1851 -117 +-1306 8 1831 10 Sep 05 02:03 LAG2 8 0 115 119 +- 439 -34 +- 656 5 1831 11 Sep 05 01:43 LAG1 7 0 95 -155 +- 891 -148 +- 706 7 1831 11 Sep 05 21:01 LAG1 2 0 136 -134 +-8878 0 +-6161 0 1831 12 Sep 05 00:25 LAG1 5 0 80 -195 +-1503 -118 +-1260 4 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 9 Sep 05 16:31 LAG1 10 0 16 -3 +- 190 -4 +- 116 14 1864 10 Sep 05 15:05 LAG1 11 0 17 -5 +- 189 -1 +- 114 16 1864 11 Sep 05 17:19 LAG1 11 0 52 -49 +- 180 -6 +- 118 13 1864 12 Sep 05 15:53 LAG1 12 0 27 -21 +- 173 -2 +- 85 15 1864 12 Sep 05 20:30 LAG2 9 0 39 20 +- 200 -36 +- 362 26 1864 13 Sep 05 18:17 LAG1 8 0 45 -30 +- 306 -9 +- 294 24 1864 13 Sep 05 21:37 LAG1 4 0 22 -2 +- 307 8 +- 572 21 1864 13 Sep 05 22:23 LAG2 11 0 26 -17 +- 180 10 +- 117 11 1864 14 Sep 05 16:43 LAG1 10 0 41 -19 +- 199 -7 +- 96 29 1864 14 Sep 05 20:53 LAG2 3 0 35 70 +- 936 -218 +-2297 6 1864 15 Sep 05 15:21 LAG1 11 0 28 -12 +- 182 5 +- 95 24 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 12 Sep 05 19:53 LAG1 6 0 107 206 +- 984 -50 +- 467 13 1873 13 Sep 05 22:00 LAG1 1 0 16 0 +- 0 0 +- 0 0 1873 14 Sep 05 02:16 LAG2 2 0 101 737 +-3111 348 +-1520 0 1873 14 Sep 05 20:47 LAG1 2 0 142 199 +-9999 -28 +-7330 0 1873 14 Sep 05 23:47 LAG1 10 0 101 97 +- 189 -5 +- 163 25 1873 15 Sep 05 00:31 LAG2 3 0 139 140 +- 351 5 +- 212 8 1873 15 Sep 05 19:09 LAG1 11 0 270 290 +- 221 -60 +- 172 94*CHK* 1873 16 Sep 05 01:59 LAG1 7 0 255 250 +- 240 12 +- 320 32 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 9 Sep 05 20:02 LAG1 19 0 15 4 +- 69 6 +- 39 7 1884 9 Sep 05 23:35 LAG1 16 0 11 1 +- 75 4 +- 49 7 1884 11 Sep 05 20:49 LAG1 16 0 19 -3 +- 75 9 +- 43 8 1884 13 Sep 05 21:47 LAG1 10 0 13 -12 +- 99 5 +- 81 5 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 9 Sep 05 06:19 LAG2 6 0 42 45 +- 204 2 +- 113 8 6405 9 Sep 05 20:25 LAG2 2 0 12 -24 +- 91 108 +- 551 0 6405 10 Sep 05 00:59 LAG1 9 0 3 0 +- 25 -1 +- 31 2 6405 11 Sep 05 02:51 LAG2 14 0 16 -17 +- 37 2 +- 25 5 6405 12 Sep 05 00:27 LAG2 20 0 23 20 +- 15 7 +- 13 13 6405 13 Sep 05 03:03 LAG2 16 0 3 -3 +- 29 2 +- 18 2 6405 13 Sep 05 06:57 LAG2 8 0 18 18 +- 28 1 +- 51 1 6405 14 Sep 05 00:43 LAG2 19 0 12 -12 +- 16 -3 +- 14 4 6405 14 Sep 05 05:18 LAG2 9 0 10 -22 +- 61 13 +- 42 7 6405 14 Sep 05 21:45 LAG1 9 0 9 1 +- 39 -5 +- 28 5 6405 15 Sep 05 01:09 LAG1 8 0 8 -5 +- 26 -4 +- 40 7 6405 15 Sep 05 13:31 LAG1 6 0 10 18 +- 70 8 +- 52 5 6405 15 Sep 05 20:55 LAG2 16 0 30 10 +- 18 16 +- 14 13 6405 15 Sep 05 23:45 LAG1 13 0 11 -1 +- 20 -1 +- 12 10 6405 16 Sep 05 00:51 LAG2 21 0 13 3 +- 18 11 +- 13 2 6405 16 Sep 05 22:13 LAG1 16 0 7 3 +- 17 0 +- 10 7 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 12 Sep 05 19:31 LAG1 9 0 13 -11 +- 65 -1 +- 41 5 6810 12 Sep 05 23:01 LAG1 19 0 24 -22 +- 42 4 +- 23 3 6810 13 Sep 05 00:05 LAG2 8 0 8 -4 +- 208 2 +- 165 2 6810 13 Sep 05 05:53 LAG1 26 0 10 -9 +- 35 1 +- 18 3 6810 13 Sep 05 08:02 LAG2 14 0 10 -10 +- 53 0 +- 36 2 6810 13 Sep 05 12:07 LAG2 11 0 8 5 +- 101 -2 +- 63 2 6810 13 Sep 05 18:05 LAG1 21 0 7 -2 +- 40 0 +- 21 7 6810 14 Sep 05 10:21 LAG2 2 0 13 -17 +- 759 -2 +- 410 0 6810 14 Sep 05 23:48 LAG1 14 0 11 -9 +- 53 0 +- 32 5 6810 15 Sep 05 00:25 LAG2 14 0 10 -4 +- 49 7 +- 46 5 6810 15 Sep 05 03:11 LAG1 23 0 22 -18 +- 38 -5 +- 19 5 6810 15 Sep 05 04:13 LAG2 19 0 14 -11 +- 42 6 +- 26 2 6810 15 Sep 05 06:43 LAG1 26 0 19 0 +- 36 -10 +- 20 6 6810 15 Sep 05 08:17 LAG2 16 0 4 0 +- 59 1 +- 35 4 6810 15 Sep 05 12:22 LAG2 12 0 11 -7 +- 58 -7 +- 38 3 6810 15 Sep 05 18:55 LAG1 18 0 17 -12 +- 45 3 +- 24 5 6810 15 Sep 05 22:31 LAG1 4 0 18 24 +- 429 19 +- 198 1 6810 16 Sep 05 01:55 LAG1 11 0 6 1 +- 66 1 +- 39 6 6810 16 Sep 05 02:12 LAG2 8 0 7 -6 +- 68 0 +- 38 3 6810 16 Sep 05 05:15 LAG1 19 0 31 -9 +- 47 -12 +- 23 8 6810 16 Sep 05 06:19 LAG2 16 0 10 -7 +- 45 -4 +- 29 4 6810 16 Sep 05 10:31 LAG2 12 0 18 -15 +- 55 -7 +- 30 3 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 13 Sep 05 03:35 LAG1 3 0 18 27 +- 157 -10 +- 182 0 7080 14 Sep 05 02:22 LAG1 5 0 14 87 +- 252 -40 +- 105 1 7080 14 Sep 05 05:43 LAG1 4 0 2 7 +- 125 -7 +- 110 1 7080 14 Sep 05 09:30 LAG2 8 0 2 1 +- 46 0 +- 39 1 7080 14 Sep 05 12:09 LAG1 5 0 10 -7 +- 60 3 +- 60 0 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 9 Sep 05 09:16 LAG2 5 0 8 -9 +- 21 -7 +- 56 1 7090 9 Sep 05 09:57 LAG1 7 0 20 -7 +- 18 17 +- 19 1 7090 9 Sep 05 13:17 LAG2 10 0 16 -16 +- 14 -6 +- 9 3 7090 9 Sep 05 13:33 LAG1 4 0 20 -17 +- 42 6 +- 104 0 7090 9 Sep 05 17:33 LAG2 12 0 8 1 +- 13 5 +- 9 2 7090 9 Sep 05 22:27 LAG1 15 0 4 -3 +- 10 2 +- 9 2 7090 10 Sep 05 02:03 LAG1 2 0 8 -48 +- 309 -38 +- 288 0 7090 10 Sep 05 08:35 LAG1 8 0 4 2 +- 15 1 +- 8 2 7090 10 Sep 05 11:17 LAG2 23 0 4 2 +- 8 1 +- 8 3 7090 10 Sep 05 12:03 LAG1 16 0 3 -2 +- 10 0 +- 6 1 7090 10 Sep 05 15:29 LAG2 23 0 9 4 +- 9 7 +- 6 2 7090 10 Sep 05 20:01 LAG2 6 0 5 14 +- 55 -20 +- 73 2 7090 11 Sep 05 09:21 LAG2 13 0 14 11 +- 12 -3 +- 12 6 7090 11 Sep 05 11:03 LAG1 5 0 6 19 +- 150 -8 +- 70 5 7090 11 Sep 05 13:33 LAG2 15 0 6 -5 +- 12 0 +- 10 4 7090 11 Sep 05 23:23 LAG1 12 0 11 -10 +- 15 0 +- 11 1 7090 12 Sep 05 07:27 LAG2 10 0 8 -10 +- 16 4 +- 9 2 7090 12 Sep 05 09:11 LAG1 14 0 9 -7 +- 11 2 +- 4 2 7090 12 Sep 05 11:29 LAG2 28 0 9 -4 +- 7 -5 +- 6 2 7090 12 Sep 05 12:49 LAG1 14 0 7 5 +- 11 3 +- 8 1 7090 12 Sep 05 15:43 LAG2 26 0 11 9 +- 8 1 +- 4 4 7090 12 Sep 05 20:07 LAG2 8 0 10 -5 +- 19 -13 +- 44 3 7090 12 Sep 05 21:53 LAG1 13 0 14 14 +- 11 -3 +- 13 1 7090 13 Sep 05 08:13 LAG1 3 0 8 -10 +- 35 11 +- 161 0 7090 13 Sep 05 11:21 LAG1 20 0 21 -4 +- 9 9 +- 4 9 7090 13 Sep 05 13:55 LAG2 20 0 7 2 +- 9 -6 +- 7 1 7090 14 Sep 05 07:56 LAG2 8 0 14 -17 +- 38 2 +- 29 4 7090 14 Sep 05 10:05 LAG1 10 0 20 -15 +- 13 5 +- 8 4 7090 14 Sep 05 11:47 LAG2 22 0 9 2 +- 9 -6 +- 6 5 7090 14 Sep 05 13:43 LAG1 10 0 7 7 +- 13 6 +- 24 1 7090 14 Sep 05 15:54 LAG2 14 0 4 1 +- 11 0 +- 6 3 7090 14 Sep 05 22:39 LAG1 17 0 12 -11 +- 10 -3 +- 7 1 7090 15 Sep 05 05:51 LAG2 11 0 12 -10 +- 13 9 +- 11 2 7090 15 Sep 05 08:57 LAG1 12 0 21 -31 +- 19 10 +- 13 2 7090 15 Sep 05 09:47 LAG2 19 0 10 -7 +- 9 -5 +- 7 1 7090 15 Sep 05 12:11 LAG1 16 0 20 -5 +- 10 12 +- 6 3 7090 15 Sep 05 14:01 LAG2 14 0 10 4 +- 11 -4 +- 5 1 7090 15 Sep 05 18:07 LAG2 12 0 8 -11 +- 31 -12 +- 22 1 7090 15 Sep 05 21:17 LAG1 14 0 9 -8 +- 11 3 +- 11 2 7090 16 Sep 05 00:48 LAG1 7 0 19 -26 +- 47 -4 +- 29 1 7090 16 Sep 05 08:04 LAG2 8 0 20 -16 +- 19 -4 +- 17 5 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 9 Sep 05 04:53 LAG1 16 0 4 3 +- 11 1 +- 7 2 7105 9 Sep 05 07:02 LAG2 23 0 6 3 +- 8 3 +- 6 1 7105 9 Sep 05 08:14 LAG1 15 0 2 -1 +- 11 0 +- 8 1 7105 12 Sep 05 18:01 LAG2 3 0 9 -13 +- 52 16 +- 165 1 7105 13 Sep 05 06:29 LAG1 16 0 8 -8 +- 10 3 +- 8 1 7105 13 Sep 05 07:31 LAG2 24 0 12 -11 +- 8 0 +- 5 2 7105 13 Sep 05 10:25 LAG1 4 0 27 51 +- 752 -8 +- 263 2 7105 13 Sep 05 11:39 LAG2 16 0 37 -18 +- 10 -20 +- 6 2 7105 13 Sep 05 13:39 LAG1 7 0 8 -12 +- 29 6 +- 33 1 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 9 Sep 05 01:59 LAG1 10 0 10 4 +- 32 -8 +- 22 6 7110 10 Sep 05 11:01 LAG1 3 0 20 9 +- 276 -18 +- 176 0 7110 13 Sep 05 03:23 LAG1 19 0 20 15 +- 11 -11 +- 5 4 7110 13 Sep 05 10:25 LAG1 4 0 13 -47 +- 111 47 +- 95 4 7110 13 Sep 05 13:49 LAG1 3 0 4 -30 +- 188 22 +- 134 0 7110 13 Sep 05 15:47 LAG2 8 0 29 -19 +- 22 -16 +- 29 1 7110 14 Sep 05 05:50 LAG1 5 0 12 32 +- 110 -23 +- 58 3 7110 14 Sep 05 17:51 LAG2 5 0 9 2 +- 75 9 +- 62 1 7110 15 Sep 05 04:03 LAG1 12 0 23 6 +- 15 -10 +- 8 4 7110 15 Sep 05 07:39 LAG1 1 0 3 0 +- 0 0 +- 0 0 7110 15 Sep 05 07:57 LAG2 2 0 20 1 +- 338 34 +- 606 0 7110 15 Sep 05 11:07 LAG1 3 0 6 -2 +- 106 -5 +- 141 0 7110 15 Sep 05 11:59 LAG2 7 0 16 -7 +- 87 -4 +- 47 2 7110 15 Sep 05 14:39 LAG1 3 0 1 5 +- 281 -2 +- 164 0 7110 15 Sep 05 16:04 LAG2 4 0 5 -2 +- 36 14 +- 73 2 7110 16 Sep 05 02:57 LAG1 6 0 31 33 +- 19 -11 +- 28 2 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 9 Sep 05 05:45 LAG1 13 0 11 -6 +- 12 -3 +- 6 4 7124 9 Sep 05 10:03 LAG2 11 0 14 30 +- 43 11 +- 26 3 7124 10 Sep 05 04:41 LAG1 5 0 12 14 +- 24 -16 +- 27 0 7124 10 Sep 05 08:27 LAG2 4 0 28 26 +- 21 53 +- 122 6 7124 16 Sep 05 07:00 LAG1 11 0 19 -5 +- 15 -18 +- 17 1 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 9 Sep 05 12:39 LAG1 15 0 25 9 +- 40 10 +- 19 6 7237 10 Sep 05 11:39 LAG1 5 0 11 -15 +- 216 4 +- 131 7 7237 12 Sep 05 12:07 LAG1 12 0 54 53 +- 44 3 +- 22 7 7237 14 Sep 05 13:11 LAG1 8 0 40 33 +- 105 5 +- 70 4 7237 14 Sep 05 19:47 LAG1 3 0 2 4 +- 892 2 +- 507 2 Station 7358 (Tanegashima) (position solved, acc. 10 mm) 7358 14 Sep 05 12:55 LAG1 13 0 11 0 +- 12 5 +- 8 7 7358 14 Sep 05 16:57 LAG2 10 0 14 0 +- 13 13 +- 14 7 7358 14 Sep 05 19:34 LAG1 5 0 13 -4 +- 145 -2 +- 72 13 7358 15 Sep 05 11:59 LAG1 2 0 4 24 +- 418 -26 +- 386 0 Station 7405 (Concepcion) (position solved, acc. 20 mm) 7405 10 Sep 05 00:25 LAG2 10 0 14 -14 +- 21 0 +- 34 1 7405 10 Sep 05 01:03 LAG1 6 0 5 -4 +- 43 7 +- 58 4 7405 10 Sep 05 04:57 LAG2 5 0 8 7 +- 188 0 +- 119 2 7405 12 Sep 05 00:33 LAG2 16 0 5 0 +- 16 -5 +- 18 2 7405 13 Sep 05 03:03 LAG2 5 0 3 0 +- 33 5 +- 47 1 7405 14 Sep 05 00:50 LAG2 4 0 7 -2 +- 70 5 +- 74 1 7405 15 Sep 05 01:13 LAG1 3 0 24 -26 +- 48 -8 +- 114 0 7405 15 Sep 05 03:02 LAG2 6 0 19 -10 +- 89 7 +- 70 4 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 9 Sep 05 03:51 LAG1 3 0 7 13 +- 67 35 +- 151 4 7501 9 Sep 05 17:21 LAG1 7 0 20 4 +- 17 8 +- 9 4 7501 11 Sep 05 14:38 LAG1 1 0 20 0 +- 0 0 +- 0 0 7501 11 Sep 05 17:03 LAG2 2 0 26 -162 +-1014 -133 +- 995 0 7501 11 Sep 05 18:05 LAG1 2 0 5 140 +- 768 83 +- 453 0 7501 11 Sep 05 21:17 LAG2 10 0 6 5 +- 14 3 +- 8 2 7501 12 Sep 05 01:35 LAG2 6 0 11 -10 +- 18 -8 +- 60 1 7501 12 Sep 05 03:13 LAG1 7 0 5 -6 +- 21 -9 +- 41 1 7501 12 Sep 05 06:39 LAG1 2 0 4 -246 +-3729 -111 +-1667 0 7501 12 Sep 05 17:01 LAG1 8 0 8 -2 +- 60 0 +- 28 7 7501 12 Sep 05 19:37 LAG2 9 0 12 4 +- 24 8 +- 24 4 7501 12 Sep 05 23:31 LAG2 12 0 7 -6 +- 16 0 +- 17 3 7501 13 Sep 05 17:31 LAG2 11 0 8 4 +- 20 5 +- 27 1 7501 13 Sep 05 19:04 LAG1 5 0 15 -13 +- 27 -2 +- 32 3 7501 13 Sep 05 21:31 LAG2 17 0 8 -4 +- 10 2 +- 6 5 7501 14 Sep 05 17:56 LAG1 4 0 19 17 +- 226 0 +- 98 4 7501 14 Sep 05 19:37 LAG2 13 0 11 14 +- 14 14 +- 18 1 7501 14 Sep 05 23:49 LAG2 7 0 24 -21 +- 19 18 +- 12 2 7501 15 Sep 05 06:25 LAG1 2 0 4 -33 +- 266 36 +- 311 0 7501 15 Sep 05 16:26 LAG1 10 0 19 0 +- 51 8 +- 22 1 7501 15 Sep 05 17:51 LAG2 8 0 26 20 +- 33 8 +- 39 1 7501 15 Sep 05 21:47 LAG2 9 0 14 3 +- 14 8 +- 8 3 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 12 Sep 05 19:47 LAG1 11 0 12 -10 +- 74 -1 +- 45 1 7810 12 Sep 05 23:01 LAG1 21 0 26 -24 +- 39 4 +- 21 3 7810 13 Sep 05 00:15 LAG2 2 0 9 -20 +- 307 -26 +- 373 0 7810 13 Sep 05 05:53 LAG1 27 0 11 -10 +- 35 1 +- 17 3 7810 13 Sep 05 08:11 LAG2 13 0 11 -9 +- 53 0 +- 40 6 7810 13 Sep 05 12:07 LAG2 10 0 18 28 +- 121 9 +- 73 8 7810 13 Sep 05 18:09 LAG1 15 0 6 -1 +- 51 0 +- 29 6 7810 14 Sep 05 10:21 LAG2 2 0 4 1 +- 787 3 +- 423 0 7810 14 Sep 05 23:53 LAG1 13 0 8 -8 +- 51 0 +- 34 3 7810 15 Sep 05 00:27 LAG2 14 0 9 1 +- 52 8 +- 56 5 7810 15 Sep 05 03:11 LAG1 24 0 23 -19 +- 37 -5 +- 18 4 7810 15 Sep 05 04:19 LAG2 19 0 15 -13 +- 44 8 +- 28 4 7810 15 Sep 05 06:43 LAG1 19 0 20 -5 +- 41 -9 +- 21 4 7810 15 Sep 05 08:17 LAG2 19 0 7 -2 +- 48 2 +- 29 4 7810 15 Sep 05 12:25 LAG2 11 0 15 -18 +- 66 -7 +- 50 2 7810 15 Sep 05 18:53 LAG1 24 0 19 -17 +- 37 3 +- 17 4 7810 15 Sep 05 22:31 LAG1 5 0 29 -6 +- 488 10 +- 225 2 7810 16 Sep 05 01:55 LAG1 14 0 7 -5 +- 53 1 +- 33 2 7810 16 Sep 05 02:23 LAG2 5 0 15 -15 +- 87 0 +- 70 2 7810 16 Sep 05 05:17 LAG1 25 0 31 -15 +- 36 -12 +- 17 4 7810 16 Sep 05 06:35 LAG2 15 0 14 -8 +- 53 -4 +- 38 5 7810 16 Sep 05 10:32 LAG2 10 0 19 -12 +- 59 -10 +- 33 4 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 13 Sep 05 21:45 LAG1 14 0 23 21 +- 48 0 +- 35 9 7811 14 Sep 05 01:09 LAG1 11 0 20 15 +- 75 -2 +- 55 9 7811 14 Sep 05 02:24 LAG2 5 0 32 30 +- 87 -6 +- 125 3 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 9 Sep 05 03:55 LAG2 9 0 59 111 +- 219 -25 +- 105 3 7824 9 Sep 05 07:49 LAG2 4 0 51 55 +- 79 -8 +- 111 1 7824 9 Sep 05 20:21 LAG1 15 0 72 69 +- 32 4 +- 16 8 7824 9 Sep 05 23:43 LAG1 14 0 42 51 +- 45 10 +- 31 4 7824 10 Sep 05 01:57 LAG2 8 0 61 70 +- 111 -8 +- 97 1 7824 10 Sep 05 03:13 LAG1 4 0 48 71 +- 219 23 +- 213 3 7824 11 Sep 05 21:08 LAG1 3 0 69 57 +- 73 13 +- 34 0 7824 12 Sep 05 05:53 LAG2 20 0 68 67 +- 28 1 +- 20 6 7824 12 Sep 05 19:55 LAG1 12 0 79 88 +- 53 -6 +- 26 5 7824 12 Sep 05 23:31 LAG1 9 0 57 58 +- 85 -1 +- 62 1 7824 13 Sep 05 02:41 LAG1 12 0 45 43 +- 38 4 +- 34 1 7824 13 Sep 05 06:08 LAG1 5 0 79 79 +- 64 0 +- 34 1 7824 13 Sep 05 08:05 LAG2 17 0 66 65 +- 30 -3 +- 26 5 7824 13 Sep 05 12:13 LAG2 2 0 73 -77 +-3838 -68 +-1723 0 7824 13 Sep 05 21:55 LAG1 21 0 68 68 +- 27 -2 +- 15 11 7824 14 Sep 05 01:19 LAG1 9 0 57 65 +- 68 10 +- 65 2 7824 14 Sep 05 02:25 LAG2 6 0 76 91 +- 183 -11 +- 139 1 7824 14 Sep 05 06:03 LAG2 20 0 62 62 +- 27 6 +- 20 3 7824 14 Sep 05 08:11 LAG1 6 0 72 78 +- 184 4 +- 131 3 7824 14 Sep 05 10:29 LAG2 2 0 79 135 +-1293 60 +-1384 0 7824 15 Sep 05 19:07 LAG1 20 0 48 48 +- 27 7 +- 16 7 7824 16 Sep 05 05:47 LAG1 6 0 35 80 +- 226 -25 +- 121 1 7824 16 Sep 05 21:39 LAG1 9 0 55 56 +- 94 0 +- 56 3 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 10 Sep 05 20:45 LAG1 15 0 8 2 +- 10 -2 +- 6 6 7825 11 Sep 05 05:35 LAG2 7 0 3 1 +- 33 2 +- 32 3 7825 13 Sep 05 05:56 LAG2 7 0 8 6 +- 33 0 +- 15 4 7825 13 Sep 05 07:49 LAG1 13 0 4 0 +- 11 -1 +- 5 3 7825 13 Sep 05 20:15 LAG1 20 0 6 2 +- 9 0 +- 6 5 7825 14 Sep 05 22:30 LAG1 9 0 6 -7 +- 18 -2 +- 16 2 7825 15 Sep 05 06:01 LAG2 13 1 12 10 +- 12 1 +- 12 7 7825 15 Sep 05 08:56 LAG1 11 0 6 -9 +- 38 2 +- 18 2 7825 15 Sep 05 10:37 LAG2 9 0 18 0 +- 51 -12 +- 37 7 7825 15 Sep 05 14:13 LAG2 11 0 5 -5 +- 47 -5 +- 26 2 7825 16 Sep 05 19:44 LAG1 7 1 5 -3 +- 19 2 +- 14 3 7825 16 Sep 05 23:15 LAG1 11 1 189 79 +- 13 27 +- 6 153*CHK* Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 9 Sep 05 21:49 LAG2 12 0 3 0 +- 19 0 +- 20 3 7832 10 Sep 05 01:45 LAG2 7 0 16 -6 +- 119 -13 +- 74 2 7832 10 Sep 05 02:41 LAG1 11 0 6 -6 +- 32 -1 +- 21 4 7832 10 Sep 05 06:18 LAG2 10 0 5 0 +- 21 5 +- 29 2 7832 10 Sep 05 15:15 LAG1 20 0 23 -1 +- 14 -14 +- 9 4 7832 10 Sep 05 18:49 LAG1 8 0 33 -1 +- 23 -19 +- 13 4 7832 10 Sep 05 23:51 LAG2 18 0 15 -4 +- 15 -10 +- 11 5 7832 11 Sep 05 01:23 LAG1 16 0 11 -10 +- 16 -3 +- 12 3 7832 11 Sep 05 04:15 LAG2 10 0 17 -14 +- 21 -8 +- 38 4 7832 11 Sep 05 05:17 LAG1 6 0 15 19 +- 164 -2 +- 88 5 7832 11 Sep 05 08:29 LAG2 5 0 39 -82 +- 71 -74 +- 69 18 7832 11 Sep 05 17:23 LAG1 4 0 14 44 +- 688 11 +- 255 3 7832 11 Sep 05 21:59 LAG2 16 0 4 0 +- 16 0 +- 15 4 7832 12 Sep 05 00:13 LAG1 8 0 8 3 +- 23 7 +- 41 6 7832 12 Sep 05 01:59 LAG2 7 0 11 -22 +- 128 -20 +- 81 3 7832 12 Sep 05 06:31 LAG2 8 0 3 -1 +- 32 0 +- 48 2 7832 12 Sep 05 10:44 LAG2 5 0 7 6 +- 51 0 +- 40 3 7832 12 Sep 05 16:09 LAG1 9 0 6 1 +- 39 -2 +- 28 2 7832 12 Sep 05 19:39 LAG1 8 0 7 -8 +- 34 -4 +- 40 4 7832 12 Sep 05 23:59 LAG2 15 0 8 -12 +- 27 -6 +- 17 3 7832 13 Sep 05 02:17 LAG1 7 0 5 -3 +- 28 2 +- 38 3 7832 13 Sep 05 04:33 LAG2 9 0 12 -12 +- 25 5 +- 34 6 7832 13 Sep 05 05:57 LAG1 6 0 12 -2 +- 54 17 +- 76 7 7832 13 Sep 05 08:43 LAG2 4 0 7 -7 +- 143 -11 +- 120 1 7832 13 Sep 05 14:53 LAG1 11 0 5 4 +- 20 0 +- 23 4 7832 13 Sep 05 18:19 LAG1 6 0 4 -8 +- 75 -3 +- 54 1 7832 13 Sep 05 22:07 LAG2 11 0 6 -7 +- 53 -7 +- 34 2 7832 14 Sep 05 01:01 LAG1 12 0 9 9 +- 26 -1 +- 21 4 7832 14 Sep 05 02:13 LAG2 6 0 11 -51 +- 202 -25 +- 121 4 7832 14 Sep 05 04:21 LAG1 13 0 13 4 +- 19 -8 +- 11 4 7832 14 Sep 05 06:43 LAG2 4 0 13 -81 +- 227 -67 +- 178 3 7832 14 Sep 05 10:55 LAG2 7 0 9 10 +- 32 -4 +- 28 4 7832 14 Sep 05 16:49 LAG1 8 0 19 -4 +- 130 -9 +- 54 2 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 9 Sep 05 00:39 LAG2 12 0 47 46 +- 31 0 +- 34 7 7838 9 Sep 05 09:11 LAG1 14 0 35 35 +- 27 1 +- 23 7 7838 12 Sep 05 12:03 LAG1 10 0 37 38 +- 32 -7 +- 12 7 7838 12 Sep 05 15:40 LAG1 8 0 39 39 +- 34 -13 +- 54 6 7838 12 Sep 05 16:33 LAG2 15 0 58 56 +- 25 20 +- 22 10 7838 12 Sep 05 18:49 LAG1 18 0 56 56 +- 22 -2 +- 15 7 7838 13 Sep 05 00:58 LAG2 14 0 41 41 +- 28 2 +- 25 5 7838 13 Sep 05 10:41 LAG1 24 0 49 47 +- 19 1 +- 9 14 7838 13 Sep 05 14:15 LAG1 16 0 40 39 +- 24 -5 +- 19 5 7838 13 Sep 05 17:33 LAG1 13 0 38 36 +- 26 -7 +- 20 4 7838 13 Sep 05 18:41 LAG2 10 0 36 34 +- 34 2 +- 18 5 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 9 Sep 05 00:07 LAG2 6 0 12 -6 +- 49 -6 +- 55 1 7839 9 Sep 05 00:54 LAG1 8 0 15 -13 +- 15 3 +- 10 1 7839 9 Sep 05 03:33 LAG2 10 0 1 0 +- 14 0 +- 7 1 7839 9 Sep 05 04:19 LAG1 16 0 5 -4 +- 10 0 +- 5 2 7839 9 Sep 05 07:45 LAG2 8 0 9 -11 +- 17 -4 +- 10 1 7839 11 Sep 05 17:27 LAG1 12 0 5 0 +- 12 4 +- 10 1 7839 11 Sep 05 21:03 LAG1 7 0 14 -8 +- 25 5 +- 24 0 7839 12 Sep 05 00:27 LAG1 3 0 28 -33 +- 214 -3 +- 143 0 7839 12 Sep 05 05:55 LAG2 26 0 8 -6 +- 8 2 +- 4 2 7839 12 Sep 05 07:25 LAG1 16 0 6 -6 +- 10 0 +- 9 1 7839 12 Sep 05 10:15 LAG2 12 0 10 -10 +- 12 0 +- 10 2 7839 12 Sep 05 19:37 LAG1 12 0 10 -5 +- 13 -2 +- 6 2 7839 12 Sep 05 23:05 LAG1 6 0 17 -14 +- 63 1 +- 40 0 7839 13 Sep 05 00:35 LAG2 7 0 7 4 +- 56 -7 +- 36 0 7839 13 Sep 05 02:23 LAG1 15 0 10 -10 +- 10 2 +- 4 2 7839 13 Sep 05 03:59 LAG2 25 0 6 -5 +- 8 0 +- 4 3 7839 13 Sep 05 06:01 LAG1 8 0 7 -6 +- 19 1 +- 14 1 7839 13 Sep 05 08:49 LAG2 4 0 3 -9 +- 416 2 +- 177 0 7839 13 Sep 05 21:59 LAG1 5 0 4 0 +- 27 -3 +- 23 1 7839 14 Sep 05 01:03 LAG1 17 0 8 -6 +- 10 -2 +- 5 1 7839 14 Sep 05 02:05 LAG2 23 0 2 -1 +- 9 -1 +- 5 1 7839 14 Sep 05 04:29 LAG1 12 0 14 -12 +- 22 -11 +- 11 1 7839 14 Sep 05 06:08 LAG2 17 0 8 -6 +- 10 4 +- 6 1 7839 14 Sep 05 08:15 LAG1 13 0 8 -7 +- 11 -3 +- 11 2 7839 14 Sep 05 10:15 LAG2 7 0 2 -4 +- 68 -3 +- 34 0 7839 14 Sep 05 16:45 LAG1 15 0 5 -2 +- 10 -2 +- 7 4 7839 14 Sep 05 20:37 LAG1 11 0 3 -2 +- 19 0 +- 12 1 7839 14 Sep 05 23:57 LAG1 9 0 2 1 +- 14 0 +- 10 1 7839 15 Sep 05 00:45 LAG2 6 0 18 9 +- 59 7 +- 49 0 7839 15 Sep 05 03:07 LAG1 18 0 9 -9 +- 11 -4 +- 6 1 7839 15 Sep 05 04:21 LAG2 19 0 14 -8 +- 9 7 +- 6 1 7839 15 Sep 05 06:53 LAG1 18 0 10 4 +- 10 -8 +- 8 1 7839 15 Sep 05 08:21 LAG2 14 0 5 4 +- 11 0 +- 6 4 7839 15 Sep 05 12:29 LAG2 7 0 3 -7 +- 42 -8 +- 38 0 7839 15 Sep 05 19:26 LAG1 2 0 0 3 +- 185 -2 +- 96 0 7839 15 Sep 05 22:27 LAG1 21 0 10 -1 +- 9 5 +- 5 1 7839 16 Sep 05 01:57 LAG1 14 0 4 3 +- 11 1 +- 8 1 7839 16 Sep 05 06:49 LAG2 8 0 4 0 +- 23 -3 +- 18 0 7839 16 Sep 05 10:35 LAG2 8 0 16 -16 +- 16 -10 +- 12 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 9 Sep 05 04:23 LAG1 11 0 4 0 +- 20 0 +- 8 4 7840 9 Sep 05 08:09 LAG1 12 0 16 -16 +- 19 0 +- 21 3 7840 10 Sep 05 06:39 LAG1 18 0 10 0 +- 15 -6 +- 10 3 7840 12 Sep 05 19:31 LAG1 21 0 10 0 +- 14 -4 +- 7 5 7840 12 Sep 05 23:05 LAG1 18 0 8 -7 +- 15 1 +- 8 3 7840 13 Sep 05 04:01 LAG2 20 0 6 2 +- 14 2 +- 9 3 7840 13 Sep 05 06:01 LAG1 20 0 7 -3 +- 14 3 +- 8 2 7840 13 Sep 05 08:05 LAG2 9 0 7 0 +- 25 1 +- 15 7 7840 13 Sep 05 18:13 LAG1 16 0 8 6 +- 16 -3 +- 14 2 7840 16 Sep 05 10:33 LAG2 8 0 12 -4 +- 23 -9 +- 17 1 7840 16 Sep 05 21:11 LAG1 20 0 7 -5 +- 14 -2 +- 7 2 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 9 Sep 05 04:07 LAG2 8 0 14 -58 +- 72 31 +- 37 8 7841 9 Sep 05 20:02 LAG1 17 0 4 1 +- 11 1 +- 6 3 Station 7848 (Ajaccio) (position solved, acc. 30 mm) 7848 9 Sep 05 20:28 LAG1 1 0 9 0 +- 0 0 +- 0 0 7848 11 Sep 05 21:06 LAG1 5 0 6 3 +- 57 8 +- 60 2 7848 12 Sep 05 20:06 LAG1 3 0 8 -10 +- 565 1 +- 265 3 7848 13 Sep 05 02:39 LAG1 6 0 6 0 +- 39 5 +- 46 3 7848 13 Sep 05 04:03 LAG2 4 0 7 -16 +- 179 -10 +- 107 5 7848 13 Sep 05 06:15 LAG1 5 0 7 1 +- 92 5 +- 94 3 7848 13 Sep 05 22:03 LAG1 2 0 13 12 +- 68 -32 +- 518 0 7848 14 Sep 05 02:15 LAG2 5 0 4 1 +- 73 -2 +- 70 1 7848 14 Sep 05 04:43 LAG1 5 0 12 -3 +- 43 -6 +- 31 8 7848 15 Sep 05 04:41 LAG2 3 0 6 -6 +- 347 11 +- 292 0 7848 16 Sep 05 05:43 LAG1 3 0 12 -27 +- 217 16 +- 221 3 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 11 Sep 05 08:03 LAG2 9 0 7 -2 +- 30 -7 +- 23 2 7941 12 Sep 05 06:19 LAG2 3 0 6 -4 +- 27 10 +- 154 2 7941 15 Sep 05 04:36 LAG2 9 0 13 0 +- 23 11 +- 20 1 7941 15 Sep 05 19:09 LAG1 17 0 4 -3 +- 11 0 +- 6 2 7941 15 Sep 05 22:37 LAG1 2 0 2 31 +- 428 23 +- 302 0 7941 15 Sep 05 22:45 LAG2 4 0 12 -12 +- 22 5 +- 122 4 7941 16 Sep 05 05:31 LAG1 15 0 9 3 +- 14 -7 +- 8 2 7941 16 Sep 05 17:43 LAG1 7 0 5 -13 +- 44 -7 +- 30 0 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 9 Sep 05 03:29 LAG2 13 0 16 -15 +- 11 -1 +- 5 4 8834 9 Sep 05 04:24 LAG1 13 0 9 -2 +- 11 3 +- 7 6 8834 9 Sep 05 07:35 LAG2 6 0 6 4 +- 59 5 +- 30 3 8834 9 Sep 05 07:59 LAG1 5 0 14 5 +- 128 12 +- 84 7 8834 9 Sep 05 11:57 LAG2 2 0 15 316 +- 797 365 +- 952 0 8834 9 Sep 05 16:25 LAG1 6 0 18 -20 +- 22 3 +- 12 4 8834 9 Sep 05 20:21 LAG1 4 0 23 -20 +- 23 -8 +- 33 0 8834 11 Sep 05 17:28 LAG1 6 0 15 -16 +- 21 2 +- 17 5 8834 12 Sep 05 16:15 LAG1 4 0 18 -7 +- 66 -16 +- 107 6 8834 13 Sep 05 12:09 LAG2 8 0 17 13 +- 33 -2 +- 20 1 8834 15 Sep 05 19:09 LAG1 3 0 5 7 +- 136 11 +- 119 1 -------------------------------------------------------------------------------- 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 - 050404 0/ 9/ 0 0/ 14/ 0 23 1831 LVIL 050117 - 050912 0/ 51/ 0 0/ 22/ 0 73 1864 MD2LAS 050110 - 050915 0/109/ 0 0/ 50/ 0 159 1873 SIMLAS 050316 - 050916 0/ 44/ 0 0/ 16/ 0 60 1884 RIGLAS 050104 - 050913 0/ 68/ 0 3/ 42/ 3 116 1893 CRMLAS 050723 - 050829 0/ 13/ 0 0/ 0/ 0 13 6405 TIGO 050104 - 050916 10/ 23/ 2 10/ 33/ 2 80 6810 ZIMLAT 050101 - 050916 239/172/ 27 229/ 83/ 20 770 7080 MLRS25 050101 - 050914 39/ 77/ 4 27/ 69/ 10 226 7090 ML0514 050101 - 050916 138/399/ 36 121/341/ 28 1063 7105 ML0725 050108 - 050913 10/ 73/ 8 27/ 66/ 7 191 7110 ML0414 050118 - 050916 95/160/ 26 67/117/ 14 479 7124 ML0819 050118 - 050916 1/ 37/ 0 1/ 20/ 1 60 7130 TL0425 050825 - 050901 1/ 3/ 0 2/ 3/ 0 9 7237 CHALAS 050102 - 050914 0/ 78/ 1 0/ 72/ 0 151 7249 BEJLAS 050101 - 050906 0/ 84/ 0 0/ 73/ 0 157 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 - 050915 5/ 29/ 0 3/ 13/ 0 50 7501 ML0616 050117 - 050915 46/124/ 6 41/114/ 7 338 7806 METLAS 050301 - 050301 0/ 0/ 0 0/ 1/ 0 1 7810 ZIMLAT 050101 - 050916 216/170/ 26 223/ 76/ 20 731 7811 POLLAS 050111 - 050914 0/ 78/ 0 0/ 42/ 0 120 7824 SPNLAS 050108 - 050916 8/134/ 2 7/ 96/ 4 251 7825 STL3 050101 - 050916 306/355/ 39 197/297/ 31 1225 7832 SALRO 050101 - 050917 108/234/ 24 149/205/ 24 744 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 - 050913 48/ 99/ 3 40/ 83/ 6 279 7839 AUSLAS 050103 - 050916 177/154/ 24 146/102/ 15 618 7840 RGOLAS 050102 - 050917 212/166/ 30 174/ 95/ 24 701 7841 GFZLA3 050105 - 050909 50/ 67/ 13 21/ 62/ 9 222 7848 FTLR06 050515 - 050916 6/ 43/ 2 4/ 14/ 2 71 7941 MLROnn 050102 - 050917 64/129/ 8 101/ 96/ 21 419 8834 WLRS01 050109 - 050915 186/164/ 30 187/109/ 20 696 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050910.0 49.2 +/- 0.1 423.4 +/- 0.1 -32651.07 +/- 0.01 050911.0 49.8 +/- 0.1 423.8 +/- 0.1 -32651.05 +/- 0.02 050912.0 50.0 +/- 0.1 423.0 +/- 0.1 -32650.82 +/- 0.03 050913.0 50.4 +/- 0.1 422.7 +/- 0.1 -32650.60 +/- 0.04 050914.0 49.8 +/- 0.1 422.0 +/- 0.1 -32650.48 +/- 0.04 050915.0 50.1 +/- 0.1 421.4 +/- 0.1 -32650.57 +/- 0.05 050916.0 50.7 +/- 0.1 421.3 +/- 0.1 -32650.99 +/- 0.05 -------------------------------------------------------------- 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 ******************************************************************************** |