| Date: | 2005-02-09 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4923: Delft QL Report February 09, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-02-09 13:15:00 UTC Message No. 4923 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report February 09, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS February 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 Wed, Feb 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 Wed, Feb 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 050208 - 050209 1 2 6405 Concepcion, Chile (TIGO 847) 050208 - 050208 1 2 6810 Zimmerwald 846, Switzerland 050207 - 050209 10 8 7080 McDonald Obs., Fort Davis, TX 050207 - 050207 1 1 7090 Yarragadee, Australia 050207 - 050208 3 3 7237 Changchun, China 050208 - 050208 1 - 7405 Concepcion, Chile (TIGO 424) 050208 - 050208 3 - 7501 Hartebeesthoek, SA (MOB-6) 050207 - 050207 1 2 7810 Zimmerwald 423, Switzerland 050207 - 050209 10 8 7811 Borowiec, Poland 050209 - 050209 1 - 7824 San Fernando, Spain 050205 - 050209 2 2 7825 Mount Stromlo, Australia 050207 - 050208 5 2 7832 Riyad, Saudi Arabia 050207 - 050209 4 6 7835 Grasse, France 050209 - 050209 1 1 7838 Simosato Observatory, Japan 050208 - 050208 1 - 7839 Graz, Austria 050207 - 050209 11 8 7840 Herstmonceux, United Kingdom 050207 - 050209 4 1 7841 Potsdam, Germany 050207 - 050209 8 3 7941 Matera, Italy (MLRO 532) 050207 - 050209 1 2 8834 Wettzell, Germany 050207 - 050208 5 4 ------ ------ --- --- TOTAL 050205 - 050209 74 55 ------------------------------------------------------------------------------ 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 Tue, Feb 1, 2005 to Wed, Feb 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 25 24 Number of Passes 200/200 169/169 Number of Normal Points 2306/2278 1837/1815 Weighted RMS of Fit (mm) 13 13 ----------------------------------------------------------------------- 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 Feb 05 01:55 LAG2 2 0 44 -1473 +-9999 951 +-9143 0 1824 7 Feb 05 01:42 LAG2 6 0 48 83 +- 996 49 +- 649 43 1824 7 Feb 05 03:45 LAG1 8 0 45 -3 +- 212 -3 +- 123 44 Station 1831 (Lviv) (position fixed, acc. 400 mm) 1831 7 Feb 05 01:43 LAG2 9 0 62 30 +- 404 -41 +- 368 21 1831 8 Feb 05 02:33 LAG1 7 0 138 127 +- 567 22 +- 796 12 1831 8 Feb 05 03:44 LAG2 8 0 31 -66 +-1444 -49 +- 864 15 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 1 Feb 05 03:39 LAG2 15 0 11 5 +- 17 -4 +- 9 8 6405 1 Feb 05 06:03 LAG1 16 0 17 -14 +- 16 -8 +- 12 1 6405 1 Feb 05 07:43 LAG2 8 0 8 9 +- 39 1 +- 52 1 6405 1 Feb 05 09:43 LAG1 8 0 25 11 +- 24 -28 +- 30 13 6405 2 Feb 05 01:27 LAG1 6 0 6 -6 +- 99 0 +- 67 3 6405 2 Feb 05 01:59 LAG2 6 0 18 -13 +- 40 -10 +- 68 2 6405 2 Feb 05 04:51 LAG1 6 0 15 5 +- 53 -10 +- 61 5 6405 2 Feb 05 05:45 LAG2 5 0 17 -74 +- 262 -30 +- 135 4 6405 2 Feb 05 08:15 LAG1 5 0 3 -6 +- 96 -4 +- 68 3 6405 8 Feb 05 03:05 LAG2 4 0 6 9 +- 865 -5 +- 357 5 6405 8 Feb 05 03:49 LAG1 9 0 13 -8 +- 22 -12 +- 31 2 6405 8 Feb 05 06:39 LAG2 7 0 6 -5 +- 26 3 +- 55 2 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 2 Feb 05 02:51 LAG2 16 0 23 -9 +- 51 11 +- 32 2 6810 2 Feb 05 03:25 LAG1 16 0 23 -12 +- 45 9 +- 23 6 6810 3 Feb 05 12:31 LAG1 17 0 11 -3 +- 45 -5 +- 24 4 6810 3 Feb 05 13:11 LAG2 11 0 18 -19 +- 82 -2 +- 83 2 6810 3 Feb 05 15:59 LAG1 21 0 8 -5 +- 40 0 +- 20 6 6810 4 Feb 05 03:11 LAG2 20 0 10 -3 +- 42 5 +- 23 4 6810 4 Feb 05 04:13 LAG1 14 0 9 -5 +- 54 0 +- 23 7 6810 4 Feb 05 07:21 LAG2 18 0 13 9 +- 46 -7 +- 29 6 6810 4 Feb 05 07:47 LAG1 17 0 17 13 +- 45 1 +- 23 8 6810 4 Feb 05 11:17 LAG1 11 0 20 17 +- 55 3 +- 34 5 6810 4 Feb 05 11:19 LAG2 14 0 21 6 +- 65 -13 +- 51 4 6810 4 Feb 05 14:39 LAG1 22 0 6 2 +- 39 -1 +- 19 5 6810 4 Feb 05 18:34 LAG1 7 0 4 -4 +- 71 0 +- 178 2 6810 5 Feb 05 01:13 LAG2 20 0 4 -4 +- 40 0 +- 25 2 6810 5 Feb 05 02:51 LAG1 17 0 13 -11 +- 44 -2 +- 29 3 6810 5 Feb 05 13:27 LAG1 13 0 13 -7 +- 58 -3 +- 29 2 6810 5 Feb 05 13:33 LAG2 3 0 10 -12 +- 150 -6 +- 289 0 6810 5 Feb 05 16:54 LAG1 19 0 10 6 +- 46 -7 +- 33 3 6810 5 Feb 05 23:35 LAG2 7 0 5 -5 +- 70 -4 +- 109 2 6810 6 Feb 05 03:47 LAG2 8 0 8 7 +- 197 -8 +- 125 6 6810 6 Feb 05 05:12 LAG1 7 0 8 -1 +- 71 4 +- 51 4 6810 6 Feb 05 15:27 LAG1 23 0 8 1 +- 38 -2 +- 20 7 6810 7 Feb 05 01:25 LAG2 17 0 15 -14 +- 44 -2 +- 23 3 6810 7 Feb 05 03:42 LAG1 18 0 5 -1 +- 46 0 +- 25 5 6810 7 Feb 05 05:27 LAG2 21 0 9 -1 +- 40 4 +- 23 5 6810 7 Feb 05 07:16 LAG1 16 0 15 -5 +- 46 6 +- 24 3 6810 7 Feb 05 09:40 LAG2 12 0 6 2 +- 52 -2 +- 47 5 6810 7 Feb 05 10:47 LAG1 18 0 4 -1 +- 44 -1 +- 29 3 6810 7 Feb 05 13:45 LAG2 8 0 4 -3 +- 71 -9 +- 158 2 6810 7 Feb 05 14:07 LAG1 21 0 15 -14 +- 40 0 +- 21 3 6810 7 Feb 05 17:47 LAG1 10 0 5 3 +- 80 -1 +- 87 3 6810 7 Feb 05 23:44 LAG2 11 0 14 -13 +- 58 -7 +- 69 5 6810 8 Feb 05 02:19 LAG1 16 0 7 -3 +- 45 -4 +- 35 4 6810 8 Feb 05 03:29 LAG2 22 0 8 -3 +- 40 2 +- 22 4 6810 8 Feb 05 05:51 LAG1 23 0 5 -4 +- 38 0 +- 17 3 6810 8 Feb 05 07:51 LAG2 11 0 16 1 +- 55 -10 +- 35 3 6810 8 Feb 05 09:25 LAG1 15 0 43 0 +- 48 12 +- 32 38 6810 8 Feb 05 11:42 LAG2 16 0 21 2 +- 58 -10 +- 46 15 6810 8 Feb 05 12:53 LAG1 19 0 14 5 +- 44 6 +- 25 5 6810 8 Feb 05 16:17 LAG1 20 0 7 4 +- 40 1 +- 26 5 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 7 Feb 05 13:19 LAG2 8 0 10 0 +- 67 -7 +- 52 3 7080 7 Feb 05 15:09 LAG1 10 0 4 5 +- 30 -3 +- 28 2 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 1 Feb 05 06:40 LAG2 9 0 1 1 +- 33 0 +- 26 1 7090 1 Feb 05 10:35 LAG2 15 0 11 8 +- 10 -9 +- 12 2 7090 1 Feb 05 11:07 LAG1 7 0 9 -6 +- 102 -1 +- 44 2 7090 1 Feb 05 14:07 LAG1 9 0 2 0 +- 16 0 +- 23 2 7090 1 Feb 05 14:37 LAG2 29 0 4 -3 +- 7 0 +- 4 2 7090 1 Feb 05 17:17 LAG1 17 0 10 -6 +- 10 5 +- 8 1 7090 1 Feb 05 18:51 LAG2 20 0 8 6 +- 9 -5 +- 8 2 7090 1 Feb 05 20:43 LAG1 14 0 13 1 +- 11 5 +- 4 1 7090 2 Feb 05 12:41 LAG2 14 0 4 -4 +- 11 0 +- 6 1 7090 2 Feb 05 12:53 LAG1 13 0 8 -3 +- 12 -5 +- 12 1 7090 2 Feb 05 16:08 LAG1 6 0 4 -4 +- 24 -3 +- 41 1 7090 2 Feb 05 16:49 LAG2 25 0 2 -1 +- 8 0 +- 4 1 7090 2 Feb 05 19:17 LAG1 24 0 11 1 +- 8 5 +- 4 3 7090 3 Feb 05 11:39 LAG1 15 0 12 6 +- 16 -6 +- 10 10 7090 3 Feb 05 15:13 LAG2 17 0 3 -4 +- 12 2 +- 8 1 7090 3 Feb 05 18:01 LAG1 21 0 13 -12 +- 9 4 +- 5 2 7090 3 Feb 05 19:09 LAG2 15 0 8 2 +- 11 -10 +- 13 1 7090 3 Feb 05 21:32 LAG1 11 0 6 3 +- 19 5 +- 14 4 7090 4 Feb 05 08:54 LAG2 9 0 9 1 +- 14 -15 +- 24 4 7090 4 Feb 05 10:27 LAG1 6 0 3 -7 +- 53 4 +- 34 1 7090 4 Feb 05 12:55 LAG2 18 0 9 5 +- 14 9 +- 11 5 7090 4 Feb 05 13:47 LAG1 7 0 12 -7 +- 34 -5 +- 37 3 7090 4 Feb 05 16:47 LAG1 10 0 7 -2 +- 18 5 +- 18 1 7090 4 Feb 05 17:23 LAG2 9 0 12 -12 +- 14 -1 +- 19 0 7090 5 Feb 05 08:55 LAG1 12 0 11 -13 +- 14 7 +- 11 2 7090 5 Feb 05 11:17 LAG2 15 0 9 -16 +- 19 8 +- 16 2 7090 5 Feb 05 12:15 LAG1 19 0 2 -1 +- 9 0 +- 7 2 7090 5 Feb 05 15:19 LAG2 12 0 7 -4 +- 12 3 +- 6 1 7090 6 Feb 05 09:17 LAG2 11 0 14 -3 +- 25 -8 +- 18 1 7090 6 Feb 05 10:47 LAG1 21 0 9 -7 +- 9 2 +- 5 1 7090 6 Feb 05 13:13 LAG2 23 0 12 -4 +- 8 -8 +- 6 2 7090 6 Feb 05 14:27 LAG1 5 0 6 -3 +- 20 15 +- 52 3 7090 6 Feb 05 17:21 LAG2 14 0 8 -3 +- 11 -4 +- 5 1 7090 6 Feb 05 17:37 LAG1 9 0 19 -16 +- 14 6 +- 18 1 7090 6 Feb 05 20:55 LAG1 13 0 2 1 +- 18 2 +- 11 0 7090 7 Feb 05 09:32 LAG1 19 0 13 -10 +- 9 -4 +- 5 2 7090 7 Feb 05 11:13 LAG2 25 0 12 -6 +- 8 9 +- 7 4 7090 7 Feb 05 13:05 LAG1 11 0 6 3 +- 12 -5 +- 16 3 7090 7 Feb 05 15:21 LAG2 23 0 8 -4 +- 8 2 +- 4 2 7090 7 Feb 05 16:35 LAG1 6 0 7 8 +- 67 -11 +- 49 2 7090 7 Feb 05 19:29 LAG1 24 0 11 -10 +- 8 1 +- 4 3 7090 8 Feb 05 09:29 LAG2 12 0 12 6 +- 18 -14 +- 16 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 1 Feb 05 08:15 LAG2 12 0 5 -6 +- 20 -3 +- 12 3 7105 1 Feb 05 09:13 LAG1 2 0 2 22 +- 364 -25 +- 435 0 7105 2 Feb 05 06:27 LAG2 15 0 10 5 +- 11 7 +- 8 1 7105 2 Feb 05 07:43 LAG1 4 0 11 8 +- 39 9 +- 124 1 7105 5 Feb 05 05:01 LAG2 14 0 19 -18 +- 12 -2 +- 14 2 7105 5 Feb 05 06:57 LAG1 7 0 14 -10 +- 24 11 +- 52 2 7105 5 Feb 05 08:51 LAG2 6 0 12 3 +- 69 -6 +- 45 0 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 1 Feb 05 00:21 LAG1 12 0 9 -11 +- 20 1 +- 11 2 7110 1 Feb 05 12:19 LAG2 6 0 7 -1 +- 20 -3 +- 12 1 7110 1 Feb 05 13:11 LAG1 4 0 15 91 +- 492 -39 +- 181 2 7110 2 Feb 05 02:33 LAG1 7 0 17 -11 +- 19 -15 +- 41 3 7110 2 Feb 05 10:23 LAG2 4 0 4 1 +- 59 0 +- 81 3 7110 2 Feb 05 11:41 LAG1 3 0 6 -8 +- 108 1 +- 60 3 7110 2 Feb 05 14:35 LAG2 5 0 3 -1 +- 19 7 +- 57 2 7110 2 Feb 05 14:51 LAG1 10 0 7 -6 +- 13 1 +- 9 2 7110 2 Feb 05 18:42 LAG2 1 0 2 0 +- 0 0 +- 0 0 7110 2 Feb 05 21:41 LAG1 3 0 7 -7 +- 24 0 +- 129 1 7110 3 Feb 05 01:03 LAG1 10 0 12 -10 +- 13 -7 +- 15 2 7110 3 Feb 05 13:21 LAG1 12 0 21 3 +- 12 -8 +- 5 3 7110 3 Feb 05 20:57 LAG2 4 0 4 0 +- 24 -3 +- 73 4 7110 3 Feb 05 23:45 LAG1 13 0 11 -15 +- 18 4 +- 9 6 7110 4 Feb 05 10:33 LAG2 10 0 17 7 +- 15 -15 +- 12 4 7110 4 Feb 05 12:01 LAG1 15 0 20 8 +- 11 -9 +- 5 8 7110 4 Feb 05 14:57 LAG2 4 0 9 7 +- 72 1 +- 96 2 7110 4 Feb 05 18:57 LAG2 7 0 17 -6 +- 16 -9 +- 11 6 7110 4 Feb 05 22:23 LAG1 12 0 16 -18 +- 14 12 +- 11 4 7110 5 Feb 05 01:51 LAG1 6 0 13 12 +- 19 -1 +- 31 5 7110 5 Feb 05 08:49 LAG2 12 0 14 24 +- 20 -14 +- 16 2 7110 5 Feb 05 10:49 LAG1 8 0 16 16 +- 15 7 +- 27 0 7110 5 Feb 05 12:35 LAG2 14 0 7 2 +- 11 3 +- 7 3 7110 5 Feb 05 14:13 LAG1 16 0 4 -1 +- 10 -2 +- 6 2 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 1 Feb 05 19:30 LAG2 12 0 27 13 +- 46 -13 +- 33 6 7237 1 Feb 05 20:13 LAG1 5 0 11 9 +- 111 1 +- 182 8 7237 2 Feb 05 17:47 LAG2 5 0 50 -75 +- 219 -29 +- 191 23 7237 2 Feb 05 18:51 LAG1 3 0 19 -11 +- 88 -1 +- 187 15 7237 2 Feb 05 21:50 LAG2 3 0 71 52 +- 519 -16 +- 444 0 7237 5 Feb 05 16:21 LAG2 4 0 29 -30 +- 101 15 +- 296 10 7237 5 Feb 05 20:21 LAG2 6 0 45 -34 +- 138 3 +- 121 33 7237 5 Feb 05 21:43 LAG1 7 0 34 13 +- 58 -2 +- 29 31 7237 8 Feb 05 21:07 LAG1 7 0 18 26 +- 103 8 +- 70 4 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 1 Feb 05 11:32 LAG1 9 0 9 6 +- 52 5 +- 118 6 7249 1 Feb 05 19:27 LAG2 13 0 14 -6 +- 44 5 +- 32 10 7249 1 Feb 05 20:27 LAG1 6 0 20 -9 +- 183 24 +- 150 4 Station 7308 (Tokyo) (position fixed, acc. 50 mm) 7308 1 Feb 05 15:49 LAG2 15 0 23 -12 +- 57 -9 +- 44 3 7308 1 Feb 05 20:01 LAG2 7 0 43 -32 +- 251 -6 +- 153 4 7308 1 Feb 05 20:15 LAG1 11 0 48 -12 +- 60 26 +- 28 3 7308 2 Feb 05 18:01 LAG2 8 0 28 -29 +- 137 15 +- 97 25 7308 2 Feb 05 19:03 LAG1 11 0 39 -28 +- 142 32 +- 72 5 7308 2 Feb 05 22:15 LAG2 10 0 41 -49 +- 186 6 +- 115 11 7308 2 Feb 05 22:35 LAG1 8 0 28 -28 +- 193 28 +- 103 3 7308 3 Feb 05 16:03 LAG2 14 0 19 6 +- 63 -17 +- 47 4 7308 3 Feb 05 19:51 LAG2 16 0 28 -19 +- 39 -20 +- 33 7 7308 3 Feb 05 21:21 LAG1 6 0 40 11 +- 537 11 +- 215 3 7308 4 Feb 05 18:14 LAG2 8 0 34 -1 +- 135 -22 +- 93 4 7308 4 Feb 05 19:59 LAG1 7 0 71 -22 +- 454 37 +- 181 2 7308 5 Feb 05 16:27 LAG2 10 0 38 -3 +- 192 -18 +- 100 5 Station 7405 (Concepcion) (position solved, acc. 20 mm) 7405 1 Feb 05 03:41 LAG2 5 0 20 16 +- 30 -4 +- 16 1 7405 1 Feb 05 06:13 LAG1 8 0 8 8 +- 25 -7 +- 28 3 7405 2 Feb 05 04:55 LAG1 2 0 34 30 +- 108 -7 +- 171 0 7405 4 Feb 05 06:02 LAG2 2 0 9 -54 +- 278 -36 +- 179 0 7405 8 Feb 05 00:33 LAG1 3 0 21 21 +- 39 8 +- 95 2 7405 8 Feb 05 03:51 LAG1 3 0 23 17 +- 44 -16 +- 84 2 7405 8 Feb 05 07:19 LAG1 7 0 12 19 +- 46 -9 +- 32 4 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 1 Feb 05 00:17 LAG2 16 0 7 3 +- 10 -3 +- 7 3 7501 1 Feb 05 02:06 LAG1 4 0 11 20 +- 55 10 +- 56 1 7501 1 Feb 05 18:18 LAG1 6 0 5 0 +- 26 6 +- 35 1 7501 1 Feb 05 18:41 LAG2 4 0 21 53 +- 146 -27 +- 124 1 7501 2 Feb 05 04:21 LAG1 2 0 7 17 +- 349 54 +- 779 0 7501 2 Feb 05 16:55 LAG1 7 0 6 4 +- 16 2 +- 19 4 7501 2 Feb 05 20:32 LAG2 11 0 11 10 +- 12 4 +- 13 2 7501 3 Feb 05 00:38 LAG2 2 0 3 -11 +- 297 -7 +- 270 0 7501 3 Feb 05 02:41 LAG1 11 0 6 5 +- 12 0 +- 6 2 7501 3 Feb 05 14:19 LAG2 9 1 11 0 +- 15 13 +- 26 8 7501 3 Feb 05 15:25 LAG1 6 0 12 12 +- 21 4 +- 14 8 7501 3 Feb 05 18:37 LAG2 6 0 6 6 +- 19 6 +- 37 3 7501 3 Feb 05 22:41 LAG2 6 0 7 5 +- 70 8 +- 46 1 7501 4 Feb 05 01:23 LAG1 10 0 18 23 +- 23 3 +- 13 2 7501 4 Feb 05 17:39 LAG1 13 0 16 5 +- 12 11 +- 11 3 7501 4 Feb 05 20:37 LAG2 10 0 15 12 +- 14 6 +- 6 5 7501 7 Feb 05 15:09 LAG2 1 0 17 0 +- 0 0 +- 0 0 7501 7 Feb 05 17:17 LAG1 7 0 12 2 +- 44 5 +- 25 5 7501 7 Feb 05 23:22 LAG2 7 0 4 0 +- 30 -3 +- 37 3 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 2 Feb 05 02:51 LAG2 16 0 18 -2 +- 54 11 +- 36 2 7810 2 Feb 05 03:25 LAG1 14 0 21 -4 +- 49 11 +- 27 5 7810 3 Feb 05 12:33 LAG1 18 0 14 6 +- 43 -6 +- 23 3 7810 3 Feb 05 13:12 LAG2 10 0 8 -11 +- 83 -5 +- 95 1 7810 3 Feb 05 16:01 LAG1 19 0 5 -3 +- 42 0 +- 23 4 7810 4 Feb 05 03:11 LAG2 19 0 12 -7 +- 43 6 +- 24 4 7810 4 Feb 05 04:13 LAG1 14 0 11 -9 +- 49 0 +- 22 6 7810 4 Feb 05 07:21 LAG2 18 0 12 7 +- 46 -7 +- 30 5 7810 4 Feb 05 07:47 LAG1 16 0 15 11 +- 46 1 +- 24 8 7810 4 Feb 05 11:17 LAG1 11 0 16 13 +- 55 5 +- 38 5 7810 4 Feb 05 11:19 LAG2 13 0 19 5 +- 75 -10 +- 58 3 7810 4 Feb 05 14:37 LAG1 23 0 5 -1 +- 38 0 +- 18 5 7810 4 Feb 05 18:35 LAG1 8 0 7 -7 +- 71 2 +- 153 2 7810 5 Feb 05 01:14 LAG2 18 0 8 -7 +- 43 2 +- 29 2 7810 5 Feb 05 02:51 LAG1 13 0 10 -10 +- 52 -1 +- 39 4 7810 5 Feb 05 13:27 LAG1 14 0 14 -6 +- 57 -4 +- 29 4 7810 5 Feb 05 13:39 LAG2 2 0 12 -5 +- 156 39 +- 745 0 7810 5 Feb 05 16:54 LAG1 18 0 8 3 +- 46 -6 +- 35 3 7810 5 Feb 05 23:35 LAG2 7 0 10 0 +- 81 -11 +- 109 5 7810 6 Feb 05 03:47 LAG2 5 0 5 4 +- 208 -5 +- 127 2 7810 6 Feb 05 05:12 LAG1 8 0 12 -4 +- 78 5 +- 55 3 7810 6 Feb 05 15:27 LAG1 24 0 11 5 +- 37 -3 +- 19 7 7810 7 Feb 05 01:29 LAG2 12 0 14 -14 +- 61 0 +- 37 3 7810 7 Feb 05 03:41 LAG1 17 0 6 -3 +- 44 0 +- 25 4 7810 7 Feb 05 05:31 LAG2 17 0 6 2 +- 46 0 +- 29 5 7810 7 Feb 05 07:17 LAG1 14 0 12 -3 +- 54 5 +- 30 5 7810 7 Feb 05 09:40 LAG2 12 0 9 5 +- 53 -5 +- 45 3 7810 7 Feb 05 10:47 LAG1 17 0 3 2 +- 45 -1 +- 31 2 7810 7 Feb 05 13:45 LAG2 9 0 10 8 +- 62 -6 +- 130 4 7810 7 Feb 05 14:07 LAG1 22 0 7 -6 +- 39 0 +- 20 1 7810 7 Feb 05 17:47 LAG1 12 0 8 3 +- 68 -5 +- 73 3 7810 7 Feb 05 23:41 LAG2 15 0 9 -5 +- 51 -8 +- 47 1 7810 8 Feb 05 02:19 LAG1 21 0 6 0 +- 40 -3 +- 29 4 7810 8 Feb 05 03:31 LAG2 20 0 6 0 +- 42 2 +- 25 5 7810 8 Feb 05 05:51 LAG1 20 0 5 0 +- 40 -1 +- 18 4 7810 8 Feb 05 07:51 LAG2 9 0 21 8 +- 61 -12 +- 39 4 7810 8 Feb 05 09:25 LAG1 14 0 3 -1 +- 51 0 +- 35 2 7810 8 Feb 05 11:43 LAG2 16 0 18 5 +- 58 -9 +- 46 8 7810 8 Feb 05 12:52 LAG1 20 0 11 0 +- 44 6 +- 24 4 7810 8 Feb 05 16:17 LAG1 19 0 6 4 +- 42 1 +- 28 3 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 1 Feb 05 00:55 LAG2 4 0 40 40 +- 61 0 +- 74 5 7824 1 Feb 05 04:36 LAG2 2 0 55 55 +- 88 9 +- 41 0 7824 1 Feb 05 05:03 LAG1 2 0 52 59 +-6302 2 +-2605 0 7824 1 Feb 05 19:05 LAG1 4 0 78 92 +- 96 -17 +- 82 3 7824 2 Feb 05 02:42 LAG2 8 0 64 84 +- 74 18 +- 50 4 7824 4 Feb 05 04:39 LAG1 5 0 69 71 +- 107 1 +- 133 0 7824 5 Feb 05 01:19 LAG2 5 0 27 29 +- 140 4 +- 183 2 7824 5 Feb 05 03:16 LAG1 2 0 22 44 +- 699 33 +-1075 0 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 5 Feb 05 05:01 LAG1 16 0 15 9 +- 10 8 +- 9 6 7825 5 Feb 05 07:39 LAG2 6 0 21 -102 +- 174 62 +- 90 2 7825 5 Feb 05 08:28 LAG1 8 0 18 -29 +- 29 -9 +- 17 5 7825 5 Feb 05 11:11 LAG2 15 0 28 10 +- 14 1 +- 8 27 7825 5 Feb 05 11:59 LAG1 10 0 26 21 +- 13 -3 +- 12 15 7825 5 Feb 05 15:12 LAG1 14 0 22 11 +- 11 -5 +- 6 16 7825 5 Feb 05 15:21 LAG2 12 0 43 30 +- 12 21 +- 7 14 7825 5 Feb 05 18:39 LAG1 22 0 24 9 +- 8 -5 +- 5 19 7825 6 Feb 05 05:21 LAG2 6 0 5 3 +- 19 -2 +- 13 4 7825 6 Feb 05 07:17 LAG1 9 0 18 -5 +- 14 13 +- 11 2 7825 6 Feb 05 09:15 LAG2 22 0 29 22 +- 9 -1 +- 6 19 7825 6 Feb 05 10:39 LAG1 17 0 24 16 +- 10 4 +- 7 17 7825 6 Feb 05 13:31 LAG2 18 0 34 21 +- 9 11 +- 6 18 7825 6 Feb 05 14:03 LAG1 12 0 10 4 +- 13 0 +- 10 9 7825 6 Feb 05 17:15 LAG1 24 0 33 8 +- 8 -11 +- 4 21 7825 7 Feb 05 09:19 LAG1 20 0 15 6 +- 9 1 +- 5 13 7825 7 Feb 05 11:27 LAG2 24 0 24 1 +- 8 8 +- 4 18 7825 7 Feb 05 12:47 LAG1 9 0 16 15 +- 14 -7 +- 14 6 7825 7 Feb 05 15:37 LAG2 16 0 16 10 +- 10 14 +- 10 6 7825 7 Feb 05 16:09 LAG1 7 0 20 -25 +- 19 -16 +- 24 1 7825 7 Feb 05 19:31 LAG1 17 0 44 31 +- 10 -19 +- 6 7 7825 8 Feb 05 18:09 LAG1 16 0 20 -17 +- 10 -7 +- 7 4 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 1 Feb 05 00:51 LAG2 9 0 11 -22 +- 69 -17 +- 41 4 7832 1 Feb 05 01:23 LAG1 6 0 47 -8 +- 208 -23 +- 91 17 7832 1 Feb 05 05:09 LAG1 7 0 9 8 +- 34 0 +- 45 3 7832 1 Feb 05 05:25 LAG2 11 0 11 0 +- 24 16 +- 36 5 7832 1 Feb 05 11:47 LAG1 7 0 21 -34 +- 73 9 +- 44 6 7832 1 Feb 05 15:15 LAG1 8 0 21 29 +- 43 -11 +- 46 3 7832 1 Feb 05 23:03 LAG2 7 0 16 -22 +- 66 -5 +- 50 4 7832 2 Feb 05 00:09 LAG1 8 0 14 -5 +- 36 10 +- 42 3 7832 2 Feb 05 07:27 LAG2 10 0 6 13 +- 55 10 +- 40 2 7832 2 Feb 05 13:45 LAG1 11 0 14 -12 +- 20 5 +- 19 6 7832 4 Feb 05 21:27 LAG2 11 0 12 10 +- 20 -3 +- 26 2 7832 7 Feb 05 06:11 LAG2 11 0 5 -3 +- 21 7 +- 31 2 7832 7 Feb 05 10:17 LAG2 7 0 15 -15 +- 25 -8 +- 51 2 7832 7 Feb 05 10:35 LAG1 6 0 12 12 +- 29 0 +- 57 3 7832 7 Feb 05 14:19 LAG1 7 0 25 -55 +- 194 13 +- 87 2 7832 8 Feb 05 00:17 LAG2 5 0 14 15 +- 619 -11 +- 255 1 7832 8 Feb 05 02:29 LAG1 10 0 25 23 +- 24 -2 +- 16 3 7832 8 Feb 05 04:17 LAG2 7 0 14 8 +- 63 6 +- 79 4 7832 8 Feb 05 08:35 LAG2 7 0 16 0 +- 73 -10 +- 51 6 7832 8 Feb 05 21:47 LAG2 11 0 33 -13 +- 22 -24 +- 14 6 Station 7835 (Grasse) (position fixed, acc. 30 mm) 7835 2 Feb 05 17:29 LAG1 9 0 18 22 +- 83 3 +- 63 2 7835 3 Feb 05 02:31 LAG1 6 0 4 1 +- 130 1 +- 125 2 7835 3 Feb 05 04:53 LAG2 28 0 8 8 +- 18 0 +- 10 1 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 1 Feb 05 19:47 LAG2 9 0 27 -2 +- 135 13 +- 86 20 7837 1 Feb 05 20:31 LAG1 4 0 23 -4 +- 227 25 +- 223 7 7837 2 Feb 05 21:39 LAG2 17 0 5 1 +- 37 -1 +- 34 5 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 1 Feb 05 01:44 LAG2 16 0 49 49 +- 28 1 +- 22 1 7838 1 Feb 05 04:09 LAG1 14 0 43 43 +- 26 1 +- 20 6 7838 1 Feb 05 15:37 LAG2 16 0 47 44 +- 24 15 +- 24 3 7838 1 Feb 05 19:25 LAG2 28 0 43 39 +- 18 8 +- 10 8 7838 3 Feb 05 08:39 LAG1 12 0 10 -5 +- 39 9 +- 33 6 7838 4 Feb 05 17:45 LAG2 15 0 45 46 +- 34 1 +- 18 8 7838 4 Feb 05 19:27 LAG1 16 0 50 50 +- 24 0 +- 12 7 7838 5 Feb 05 09:29 LAG1 6 0 14 -12 +- 45 6 +- 74 8 7838 8 Feb 05 08:47 LAG1 12 0 15 10 +- 27 -6 +- 28 10 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 1 Feb 05 08:20 LAG1 21 0 6 5 +- 9 0 +- 5 1 7839 1 Feb 05 09:01 LAG2 15 0 6 2 +- 10 2 +- 6 2 7839 1 Feb 05 15:25 LAG1 15 0 6 1 +- 12 2 +- 7 4 7839 2 Feb 05 07:05 LAG2 9 0 13 2 +- 15 8 +- 8 1 7839 2 Feb 05 07:09 LAG1 14 0 3 -1 +- 14 2 +- 8 1 7839 7 Feb 05 01:29 LAG2 14 0 7 -6 +- 11 1 +- 5 1 7839 7 Feb 05 04:05 LAG1 13 0 3 0 +- 29 -1 +- 14 1 7839 7 Feb 05 05:27 LAG2 19 0 10 -3 +- 9 4 +- 4 3 7839 7 Feb 05 09:59 LAG2 7 0 4 3 +- 19 -8 +- 29 1 7839 7 Feb 05 10:47 LAG1 14 0 3 3 +- 11 0 +- 9 1 7839 7 Feb 05 14:09 LAG1 14 0 7 -6 +- 11 1 +- 6 1 7839 7 Feb 05 17:59 LAG1 11 0 9 0 +- 14 -14 +- 21 3 7839 7 Feb 05 23:45 LAG2 13 0 8 -8 +- 12 -7 +- 12 0 7839 8 Feb 05 02:29 LAG1 12 0 7 5 +- 12 -5 +- 13 2 7839 8 Feb 05 03:37 LAG2 15 0 7 0 +- 15 5 +- 10 0 7839 8 Feb 05 05:51 LAG1 7 0 4 -4 +- 108 0 +- 44 0 7839 8 Feb 05 09:29 LAG1 10 0 2 0 +- 13 2 +- 14 1 7839 8 Feb 05 12:09 LAG2 3 0 6 14 +- 57 -23 +- 94 0 7839 8 Feb 05 12:53 LAG1 16 0 9 -2 +- 11 5 +- 6 1 7839 8 Feb 05 16:31 LAG1 6 0 11 10 +- 17 -5 +- 21 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 1 Feb 05 11:53 LAG1 18 0 7 7 +- 15 0 +- 9 3 7840 7 Feb 05 14:15 LAG1 18 0 8 3 +- 15 2 +- 9 6 7840 7 Feb 05 17:57 LAG1 14 0 3 -2 +- 17 -1 +- 20 2 7840 8 Feb 05 13:06 LAG1 8 0 24 18 +- 46 3 +- 24 2 7840 8 Feb 05 16:29 LAG1 17 0 6 2 +- 16 3 +- 12 2 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 5 Feb 05 09:23 LAG2 14 0 18 3 +- 14 -9 +- 9 7 7841 5 Feb 05 09:55 LAG1 16 0 14 14 +- 10 0 +- 7 1 7841 6 Feb 05 08:43 LAG1 13 0 7 -5 +- 11 4 +- 9 1 7841 6 Feb 05 15:39 LAG1 17 0 13 12 +- 11 -7 +- 6 3 7841 7 Feb 05 01:35 LAG2 22 0 9 -7 +- 8 1 +- 5 5 7841 7 Feb 05 04:13 LAG1 6 0 6 -47 +- 158 19 +- 67 3 7841 7 Feb 05 05:32 LAG2 9 0 8 4 +- 56 6 +- 29 3 7841 7 Feb 05 07:15 LAG1 14 0 17 -9 +- 13 6 +- 8 2 7841 7 Feb 05 10:49 LAG1 13 0 2 2 +- 11 0 +- 9 1 7841 7 Feb 05 14:11 LAG1 17 0 9 -9 +- 10 -3 +- 6 3 7841 7 Feb 05 23:53 LAG2 10 0 9 5 +- 14 -6 +- 20 2 7841 8 Feb 05 02:25 LAG1 14 0 11 11 +- 11 -4 +- 11 3 7841 8 Feb 05 03:41 LAG2 13 0 5 0 +- 17 3 +- 12 2 7841 8 Feb 05 05:57 LAG1 13 0 7 -7 +- 12 0 +- 5 1 7841 8 Feb 05 07:47 LAG2 9 0 18 4 +- 34 -9 +- 23 2 7841 8 Feb 05 09:25 LAG1 15 0 3 0 +- 10 1 +- 7 3 7841 8 Feb 05 12:51 LAG1 13 0 10 0 +- 13 1 +- 9 10 7841 8 Feb 05 16:41 LAG1 8 0 9 0 +- 22 -8 +- 27 5 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 1 Feb 05 00:48 LAG2 4 0 2 37 +- 304 18 +- 147 0 7941 7 Feb 05 07:17 LAG1 5 0 3 -11 +- 155 -5 +- 76 3 7941 7 Feb 05 09:59 LAG2 1 0 1 0 +- 0 0 +- 0 0 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 4 Feb 05 03:39 LAG2 9 0 6 -14 +- 57 4 +- 30 2 8834 4 Feb 05 07:17 LAG2 14 0 4 -3 +- 14 0 +- 10 3 8834 4 Feb 05 08:03 LAG1 11 0 6 7 +- 17 -2 +- 13 2 8834 4 Feb 05 11:29 LAG2 2 0 7 -175 +- 832 -150 +- 697 0 8834 4 Feb 05 15:03 LAG1 10 0 16 -14 +- 29 0 +- 17 1 8834 5 Feb 05 01:37 LAG2 8 0 7 -1 +- 20 6 +- 15 3 8834 5 Feb 05 03:23 LAG1 3 0 6 -59 +- 282 38 +- 176 3 8834 5 Feb 05 05:17 LAG2 16 0 21 -18 +- 10 4 +- 6 1 8834 5 Feb 05 06:25 LAG1 13 0 14 -14 +- 20 0 +- 11 2 8834 5 Feb 05 09:25 LAG2 7 0 4 -10 +- 97 -7 +- 50 1 8834 5 Feb 05 13:35 LAG1 3 0 25 -29 +- 63 -8 +- 116 2 8834 5 Feb 05 13:47 LAG2 3 0 18 -18 +- 164 0 +- 229 0 8834 5 Feb 05 17:15 LAG1 9 0 12 -7 +- 23 -5 +- 25 1 8834 6 Feb 05 03:51 LAG2 6 0 4 7 +- 61 -2 +- 38 2 8834 6 Feb 05 05:11 LAG1 10 0 22 -21 +- 14 6 +- 5 3 8834 6 Feb 05 07:37 LAG2 14 0 13 -13 +- 11 -5 +- 10 3 8834 6 Feb 05 09:03 LAG1 3 0 14 -71 +- 311 33 +- 179 1 8834 6 Feb 05 15:44 LAG1 8 0 5 -5 +- 15 1 +- 20 2 8834 7 Feb 05 05:35 LAG2 14 0 14 -13 +- 11 3 +- 6 3 8834 7 Feb 05 07:19 LAG1 9 0 25 -17 +- 20 6 +- 14 3 8834 7 Feb 05 09:53 LAG2 10 0 15 -11 +- 13 -8 +- 17 2 8834 7 Feb 05 18:15 LAG1 4 0 15 -7 +- 122 -8 +- 139 1 8834 7 Feb 05 23:59 LAG2 3 0 16 -16 +- 40 -2 +- 166 1 8834 8 Feb 05 02:35 LAG1 4 0 7 -5 +- 21 -13 +- 81 2 8834 8 Feb 05 04:03 LAG2 3 0 11 -12 +- 140 2 +- 163 4 8834 8 Feb 05 05:58 LAG1 11 0 19 -13 +- 14 -2 +- 6 8 8834 8 Feb 05 07:49 LAG2 7 0 3 1 +- 58 0 +- 39 3 8834 8 Feb 05 09:30 LAG1 7 0 13 -10 +- 20 4 +- 24 4 8834 8 Feb 05 11:49 LAG2 11 0 23 -16 +- 17 -7 +- 18 19 8834 8 Feb 05 16:37 LAG1 3 0 13 -22 +- 45 -41 +- 142 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 040701 - 050207 0/ 18/ 0 0/ 22/ 0 40 1831 LVIL 040815 - 050209 0/ 24/ 0 0/ 28/ 0 52 1864 MD2LAS 040701 - 050117 0/ 87/ 0 0/ 75/ 0 162 1873 SIMLAS 040703 - 040813 0/ 25/ 0 0/ 15/ 0 40 1884 RIGLAS 040712 - 050119 0/ 43/ 1 0/ 18/ 2 64 1893 CRMLAS 040705 - 041012 0/ 45/ 0 0/ 35/ 0 80 6405 TIGO 040710 - 050208 9/ 13/ 1 6/ 17/ 1 47 6810 ZIMLAT 040805 - 050209 187/116/ 21 110/108/ 19 561 7080 MLRS25 040701 - 050207 45/ 55/ 2 45/ 66/ 5 218 7090 ML0514 040716 - 050208 119/325/ 32 111/220/ 25 832 7105 ML0725 040701 - 050205 0/ 77/ 4 2/ 86/ 7 176 7110 ML0414 040701 - 050205 72/120/ 15 72/116/ 17 412 7124 ML0819 040705 - 050126 0/ 31/ 0 0/ 14/ 0 45 7231 WUHA01 040701 - 041208 0/ 8/ 0 0/ 20/ 0 28 7237 CHALAS 040702 - 050208 0/134/ 1 0/145/ 1 281 7249 BEJLAS 040701 - 050201 0/ 87/ 0 0/ 99/ 0 186 7308 CRLLAS 041201 - 050205 3/ 11/ 2 3/ 13/ 0 32 7355 TROS02 040702 - 040829 0/ 37/ 0 0/ 29/ 0 66 7405 TIGO 040710 - 050208 4/ 27/ 0 3/ 10/ 0 44 7501 ML0616 040701 - 050207 19/ 28/ 3 58/ 72/ 6 186 7604 BREF 041017 - 041021 0/ 1/ 0 0/ 2/ 0 3 7806 METLAS 040720 - 041203 0/ 16/ 0 0/ 10/ 0 26 7810 ZIMLAT 040701 - 050209 241/142/ 27 135/127/ 23 695 7811 POLLAS 040706 - 050209 0/ 51/ 0 0/ 59/ 0 110 7824 SPNLAS 040701 - 050209 0/ 93/ 0 0/ 86/ 0 179 7825 STL3 040807 - 050208 109/157/ 29 109/118/ 21 543 7832 SALRO 040702 - 050209 126/198/ 17 171/229/ 23 764 7835 GRASSE 040702 - 050209 0/ 44/ 1 0/ 30/ 1 76 7836 GFZLAS 040701 - 040701 0/ 1/ 0 0/ 0/ 0 1 7837 CHILAS 040704 - 050202 0/ 86/ 0 0/116/ 1 203 7838 SHOLAS 040701 - 050208 47/117/ 3 76/131/ 7 381 7839 AUSLAS 040701 - 050209 157/158/ 29 81/139/ 22 586 7840 RGOLAS 040701 - 050209 108/ 92/ 24 70/ 76/ 12 382 7841 GFZLA3 040702 - 050209 36/ 59/ 15 21/ 60/ 8 199 7845 GRASLL 040705 - 040920 11/ 14/ 0 3/ 12/ 1 41 7941 MLROnn 040701 - 050209 82/ 59/ 9 72/ 48/ 5 275 8834 WLRS01 040701 - 050208 191/126/ 24 115/131/ 18 605 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050202.0 89.1 +/- 0.1 207.8 +/- 0.1 -32578.86 +/- 0.01 050203.0 86.5 +/- 0.1 206.8 +/- 0.1 -32579.34 +/- 0.02 050204.0 84.4 +/- 0.1 206.3 +/- 0.1 -32579.66 +/- 0.03 050205.0 81.9 +/- 0.1 206.3 +/- 0.1 -32579.84 +/- 0.04 050206.0 78.6 +/- 0.1 206.2 +/- 0.1 -32580.08 +/- 0.04 050207.0 75.6 +/- 0.1 205.8 +/- 0.1 -32580.49 +/- 0.04 050208.0 73.2 +/- 0.1 205.7 +/- 0.1 -32581.03 +/- 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 ******************************************************************************** |