| Date: | 2005-08-08 19:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 5787: Delft QL Report August 08, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-08-08 19:15:00 UTC Message No. 5787 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report August 08, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS August 4, 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 Thu, Aug 4, 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 Thu, Aug 4, 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 050718 - 050730 4 - 1864 Maidanak, Uzbekistan (site 2) 050715 - 050803 18 - 1873 Simeiz, Crimea, Ukraine 050729 - 050802 2 - 1884 Riga, Latvia 050720 - 050802 4 - 1893 Kazivili, Crimea, Ukraine 050723 - 050801 7 - 6810 Zimmerwald 846, Switzerland 050716 - 050805 27 29 7080 McDonald Obs., Fort Davis, TX 050717 - 050803 7 2 7090 Yarragadee, Australia 050716 - 050804 41 48 7105 Greenbelt, Maryland 050718 - 050804 22 3 7110 Monument Peak, California 050715 - 050804 32 14 7237 Changchun, China 050722 - 050803 3 - 7249 Beijing, China 050725 - 050729 6 - 7355 Urumqi, China (TROS) 050717 - 050801 14 - 7501 Hartebeesthoek, SA (MOB-6) 050716 - 050721 7 8 7810 Zimmerwald 423, Switzerland 050716 - 050805 27 29 7811 Borowiec, Poland 050719 - 050804 9 - 7824 San Fernando, Spain 050718 - 050805 25 3 7825 Mount Stromlo, Australia 050716 - 050804 71 54 7832 Riyad, Saudi Arabia 050716 - 050803 32 26 7838 Simosato Observatory, Japan 050716 - 050803 18 8 7839 Graz, Austria 050715 - 050803 32 27 7840 Herstmonceux, United Kingdom 050716 - 050804 36 20 7841 Potsdam, Germany 050716 - 050804 8 1 7848 Ajaccio, Corsica (FTLRS) 050717 - 050719 2 - 7941 Matera, Italy (MLRO 532) 050716 - 050805 26 12 8834 Wettzell, Germany 050716 - 050805 30 22 ------ ------ --- --- TOTAL 050715 - 050805 510 306 ------------------------------------------------------------------------------ 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 Wed, Jul 27, 2005 to Thu, Aug 4, 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 24 14 Number of Passes 231/226 136/134 Number of Normal Points 2441/2384 1829/1808 Weighted RMS of Fit (mm) 14 12 ----------------------------------------------------------------------- Residual statistics per station. The header line for each station shows the station id, its name, whether the position is solved for or not and the measurement accuracy in mm. Rejected observations are not used for the calculation of the rms-of-fit, the biases or the scatter. The latter holds w.r.t. the residual trend line described by the bias estimates. Uncertainties are 3-sigma values. -------------------------------------------------------------------------------- Date Time Sat. Obs. RMS Range Bias Time Bias Scatter tot/rej (mm) (mm) (us) (mm) -------------------------------------------------------------------------------- Station 1831 (Lviv) (position fixed, acc. 400 mm) 1831 27 Jul 05 20:19 LAG1 8 0 43 40 +- 424 12 +- 543 12 1831 27 Jul 05 23:53 LAG1 7 0 204 -190 +- 517 -31 +- 655 14 1831 30 Jul 05 19:53 LAG1 5 0 93 64 +-1113 26 +- 951 13 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 28 Jul 05 18:47 LAG1 10 0 39 8 +- 189 -21 +- 119 17 1864 29 Jul 05 17:21 LAG1 10 0 36 26 +- 203 -8 +- 117 7 1864 1 Aug 05 16:49 LAG1 11 0 50 31 +- 180 -19 +- 115 25 1864 2 Aug 05 18:59 LAG1 9 0 24 7 +- 201 -12 +- 132 13 1864 3 Aug 05 17:38 LAG1 11 0 24 0 +- 183 -7 +- 113 21 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 29 Jul 05 21:08 LAG1 6 0 214 242 +- 282 -51 +- 181 15 1873 2 Aug 05 00:03 LAG1 6 0 241 243 +- 252 -21 +- 438 20 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 29 Jul 05 20:52 LAG1 15 0 7 -4 +- 85 -1 +- 56 5 1884 31 Jul 05 21:55 LAG1 12 0 18 -1 +- 118 12 +- 77 3 1884 2 Aug 05 22:31 LAG1 18 0 10 3 +- 70 4 +- 41 6 Station 1893 (Kazivili) (position fixed, acc. 100 mm) 1893 27 Jul 05 20:32 LAG1 8 0 39 51 +- 412 -40 +- 191 8 1893 29 Jul 05 21:19 LAG1 9 0 28 -6 +- 342 -9 +- 165 9 1893 30 Jul 05 19:59 LAG1 9 0 38 36 +- 416 -32 +- 186 5 1893 31 Jul 05 18:31 LAG1 9 0 35 -16 +- 243 -11 +- 159 12 1893 1 Aug 05 20:35 LAG1 10 0 17 17 +- 108 -8 +- 91 7 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 27 Jul 05 01:02 LAG1 21 0 23 -21 +- 39 4 +- 22 3 6810 27 Jul 05 04:27 LAG1 19 0 14 -12 +- 42 4 +- 22 3 6810 27 Jul 05 06:40 LAG2 11 0 8 -13 +- 110 -7 +- 82 3 6810 27 Jul 05 11:23 LAG2 2 0 27 165 +-7382 -78 +-3002 0 6810 27 Jul 05 14:42 LAG2 27 0 14 -14 +- 35 1 +- 19 3 6810 27 Jul 05 18:53 LAG2 16 0 30 -29 +- 49 1 +- 50 6 6810 27 Jul 05 20:03 LAG1 8 0 16 -14 +- 65 -5 +- 32 4 6810 28 Jul 05 06:47 LAG1 14 0 18 -21 +- 59 4 +- 35 3 6810 28 Jul 05 08:40 LAG2 21 0 14 -13 +- 40 2 +- 21 2 6810 28 Jul 05 10:31 LAG1 8 0 21 -23 +- 122 2 +- 149 1 6810 28 Jul 05 12:53 LAG2 23 0 16 -16 +- 38 2 +- 23 2 6810 28 Jul 05 17:17 LAG2 11 0 25 -12 +- 147 -7 +- 88 2 6810 28 Jul 05 18:43 LAG1 15 0 25 -23 +- 64 1 +- 58 4 6810 28 Jul 05 22:25 LAG1 10 0 16 -16 +- 60 0 +- 33 2 6810 29 Jul 05 05:13 LAG1 19 0 19 -19 +- 41 0 +- 21 5 6810 29 Jul 05 06:45 LAG2 16 0 14 -5 +- 54 -8 +- 30 6 6810 29 Jul 05 08:44 LAG1 22 0 21 -18 +- 39 -4 +- 24 5 6810 30 Jul 05 13:01 LAG2 2 0 18 -466 +-9999 -176 +-9999 0 6810 30 Jul 05 19:34 LAG1 20 0 15 -14 +- 41 -1 +- 28 5 6810 30 Jul 05 23:20 LAG1 16 0 13 -1 +- 60 -5 +- 32 7 6810 31 Jul 05 02:35 LAG1 18 0 8 -6 +- 43 3 +- 28 4 6810 31 Jul 05 05:57 LAG1 18 0 24 -25 +- 48 -1 +- 25 3 6810 31 Jul 05 07:23 LAG2 10 0 28 -6 +- 83 -14 +- 53 1 6810 31 Jul 05 09:33 LAG1 16 0 25 -25 +- 46 -1 +- 32 3 6810 31 Jul 05 11:05 LAG2 14 0 7 -10 +- 78 -4 +- 50 2 6810 1 Aug 05 05:15 LAG2 10 0 17 22 +- 123 5 +- 99 3 6810 1 Aug 05 08:07 LAG1 23 0 21 -18 +- 38 -4 +- 19 2 6810 1 Aug 05 09:05 LAG2 21 0 9 -9 +- 42 0 +- 22 3 6810 3 Aug 05 14:01 LAG2 12 0 6 11 +- 211 -7 +- 99 2 6810 3 Aug 05 17:47 LAG2 14 0 26 -17 +- 71 -7 +- 54 3 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 2 Aug 05 04:24 LAG1 11 0 13 22 +- 39 -7 +- 24 3 7080 3 Aug 05 06:30 LAG1 3 0 10 1 +- 41 -12 +- 48 3 7080 3 Aug 05 13:09 LAG2 3 0 24 33 +- 206 -10 +- 212 5 7080 3 Aug 05 13:21 LAG1 1 0 7 0 +- 0 0 +- 0 0 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 27 Jul 05 09:57 LAG1 16 0 6 -1 +- 10 4 +- 6 2 7090 27 Jul 05 12:03 LAG2 26 0 2 1 +- 8 0 +- 5 2 7090 27 Jul 05 13:17 LAG1 21 0 10 -9 +- 9 -2 +- 4 3 7090 27 Jul 05 16:19 LAG2 16 0 9 -9 +- 11 -2 +- 13 1 7090 27 Jul 05 20:25 LAG2 30 0 9 1 +- 7 4 +- 4 4 7090 28 Jul 05 01:59 LAG1 7 0 18 -49 +- 63 -18 +- 34 4 7090 28 Jul 05 10:09 LAG2 24 0 22 -15 +- 8 11 +- 6 1 7090 28 Jul 05 11:57 LAG1 21 0 22 -11 +- 9 6 +- 5 12 7090 28 Jul 05 14:09 LAG2 13 0 12 -8 +- 12 -6 +- 6 3 7090 28 Jul 05 15:53 LAG1 8 0 19 -12 +- 27 -10 +- 38 2 7090 28 Jul 05 18:58 LAG2 3 0 2 -3 +- 56 14 +- 159 0 7090 28 Jul 05 22:54 LAG2 6 0 6 -1 +- 25 7 +- 40 1 7090 29 Jul 05 10:39 LAG1 18 0 13 -11 +- 9 4 +- 5 1 7090 29 Jul 05 12:19 LAG2 20 0 14 4 +- 9 -8 +- 5 3 7090 29 Jul 05 14:09 LAG1 14 0 14 -2 +- 13 7 +- 8 1 7090 29 Jul 05 16:33 LAG2 22 0 7 0 +- 9 -5 +- 7 2 7090 29 Jul 05 21:19 LAG2 9 0 19 8 +- 63 5 +- 32 1 7090 30 Jul 05 03:13 LAG1 3 0 36 43 +- 261 -43 +- 145 6 7090 30 Jul 05 09:39 LAG1 3 0 7 7 +- 24 -5 +- 132 0 7090 30 Jul 05 10:21 LAG2 22 0 10 -4 +- 8 6 +- 6 1 7090 30 Jul 05 12:45 LAG1 22 0 13 0 +- 9 6 +- 4 2 7090 30 Jul 05 14:29 LAG2 17 0 6 -2 +- 10 -5 +- 8 1 7090 31 Jul 05 11:25 LAG1 20 0 10 -8 +- 9 3 +- 4 4 7090 31 Jul 05 12:25 LAG2 26 0 13 5 +- 8 -7 +- 4 2 7090 31 Jul 05 15:17 LAG1 8 0 5 -7 +- 22 8 +- 30 2 7090 31 Jul 05 16:43 LAG2 27 0 2 0 +- 8 -1 +- 6 1 7090 31 Jul 05 21:03 LAG2 14 0 19 4 +- 12 8 +- 6 3 7090 1 Aug 05 00:11 LAG1 12 0 8 -8 +- 12 2 +- 13 3 7090 1 Aug 05 10:13 LAG1 17 0 7 -2 +- 10 5 +- 7 1 7090 1 Aug 05 10:45 LAG2 19 0 13 2 +- 10 7 +- 6 2 7090 1 Aug 05 13:33 LAG1 16 0 15 2 +- 11 8 +- 5 3 7090 1 Aug 05 14:43 LAG2 26 0 10 9 +- 8 -1 +- 6 1 7090 2 Aug 05 12:29 LAG1 11 0 4 -3 +- 17 3 +- 9 1 7090 2 Aug 05 12:57 LAG2 13 0 8 3 +- 13 -6 +- 8 2 7090 2 Aug 05 17:01 LAG2 6 0 1 0 +- 25 0 +- 18 1 7090 2 Aug 05 21:49 LAG2 10 0 8 44 +- 84 -18 +- 39 2 7090 3 Aug 05 01:03 LAG1 6 0 29 -29 +- 17 -2 +- 34 3 7090 3 Aug 05 10:57 LAG2 15 0 8 -2 +- 10 -5 +- 7 1 7090 3 Aug 05 11:17 LAG1 9 0 11 -36 +- 43 18 +- 22 1 7090 3 Aug 05 14:31 LAG1 12 0 20 0 +- 12 14 +- 8 1 7090 3 Aug 05 15:07 LAG2 10 0 4 2 +- 13 -3 +- 18 1 7090 3 Aug 05 19:15 LAG2 27 0 2 1 +- 8 0 +- 4 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 27 Jul 05 01:49 LAG1 10 0 13 19 +- 28 -5 +- 19 5 7105 27 Jul 05 05:17 LAG1 3 0 4 -5 +- 50 -19 +- 143 2 7105 27 Jul 05 08:39 LAG1 4 0 3 -3 +- 22 -1 +- 71 1 7105 28 Jul 05 07:15 LAG1 6 0 2 1 +- 32 0 +- 37 2 7105 2 Aug 05 00:39 LAG1 6 0 24 22 +- 32 3 +- 48 3 7105 2 Aug 05 04:03 LAG1 14 0 6 5 +- 12 -2 +- 6 4 7105 2 Aug 05 07:30 LAG1 6 0 2 0 +- 19 0 +- 36 2 7105 3 Aug 05 02:37 LAG1 18 0 8 7 +- 10 -2 +- 5 3 7105 3 Aug 05 06:07 LAG1 15 0 15 -6 +- 10 -9 +- 8 2 7105 3 Aug 05 09:29 LAG1 9 0 15 -14 +- 16 1 +- 18 1 7105 3 Aug 05 21:38 LAG2 8 0 21 0 +- 60 10 +- 33 7 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 27 Jul 05 05:41 LAG1 3 0 3 15 +- 169 -11 +- 110 1 7110 27 Jul 05 12:27 LAG1 3 0 7 4 +- 244 -9 +- 191 0 7110 27 Jul 05 14:15 LAG2 6 0 15 9 +- 31 6 +- 41 4 7110 28 Jul 05 04:09 LAG1 13 0 7 -1 +- 19 -3 +- 12 2 7110 28 Jul 05 16:11 LAG2 5 0 6 -12 +- 43 -8 +- 49 0 7110 29 Jul 05 06:15 LAG1 5 1 31 62 +- 53 82 +- 58 6 7110 29 Jul 05 13:13 LAG1 4 0 6 -14 +- 178 5 +- 110 2 7110 29 Jul 05 14:13 LAG2 14 0 9 0 +- 11 -9 +- 11 2 7110 29 Jul 05 16:21 LAG1 12 0 13 -10 +- 12 -3 +- 9 4 7110 30 Jul 05 05:13 LAG1 6 0 23 23 +- 167 -18 +- 67 3 7110 30 Jul 05 08:31 LAG1 8 0 6 13 +- 35 -6 +- 23 2 7110 30 Jul 05 11:49 LAG1 3 0 9 14 +- 81 -11 +- 161 2 7110 30 Jul 05 12:32 LAG2 2 0 42 34 +- 85 -28 +- 289 0 7110 30 Jul 05 15:20 LAG1 2 0 57 231 +- 399 -138 +- 193 0 7110 1 Aug 05 12:37 LAG1 2 0 5 -58 +- 594 61 +- 681 0 7110 1 Aug 05 12:51 LAG2 7 0 15 15 +- 35 0 +- 42 0 7110 1 Aug 05 15:47 LAG1 11 0 23 -23 +- 12 0 +- 9 5 7110 2 Aug 05 14:29 LAG1 3 0 3 -2 +- 94 -1 +- 102 3 7110 2 Aug 05 14:54 LAG2 4 0 17 -11 +- 46 -6 +- 50 3 7110 3 Aug 05 06:21 LAG1 7 0 21 0 +- 34 -13 +- 21 2 7110 3 Aug 05 09:55 LAG1 4 0 15 12 +- 22 4 +- 30 6 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 3 Aug 05 13:59 LAG1 2 0 13 -29 +- 406 -60 +- 621 0 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 27 Jul 05 16:37 LAG1 3 0 12 1 +- 197 -23 +- 352 5 7249 28 Jul 05 15:11 LAG1 8 0 14 -5 +- 63 0 +- 48 13 7249 29 Jul 05 13:39 LAG1 17 1 10 3 +- 38 0 +- 26 9 7249 29 Jul 05 17:11 LAG1 10 3 28 -11 +- 117 17 +- 92 25 Station 7355 (Urumqi) (position solved, acc. 10 mm) 7355 27 Jul 05 16:33 LAG1 5 1 57 125 +- 65 66 +- 55 7*CHK* 7355 29 Jul 05 20:52 LAG1 8 5 1222 1279 +- 85 -64 +- 92 1*CHK* 7355 30 Jul 05 19:41 LAG1 6 0 1258 1321 +- 53 -44 +- 35 13*CHK* 7355 31 Jul 05 14:49 LAG1 6 1 13 -8 +- 72 5 +- 55 13 7355 31 Jul 05 18:03 LAG1 15 1 28 18 +- 11 10 +- 8 13 7355 31 Jul 05 21:35 LAG1 6 2 17 12 +- 22 17 +- 53 12 7355 1 Aug 05 16:43 LAG1 16 0 45 -35 +- 10 14 +- 6 22 7355 1 Aug 05 20:13 LAG1 14 1 21 1 +- 13 -14 +- 10 12 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 27 Jul 05 01:03 LAG1 19 0 12 -8 +- 42 4 +- 24 3 7810 27 Jul 05 04:27 LAG1 19 0 9 0 +- 42 4 +- 22 2 7810 27 Jul 05 06:41 LAG2 11 0 10 2 +- 66 -6 +- 46 1 7810 27 Jul 05 11:22 LAG2 2 0 20 240 +-6135 -105 +-2493 0 7810 27 Jul 05 14:43 LAG2 26 0 6 -4 +- 35 1 +- 19 3 7810 27 Jul 05 18:53 LAG2 16 0 23 -23 +- 49 -1 +- 50 4 7810 27 Jul 05 20:03 LAG1 11 0 14 -10 +- 55 -3 +- 28 4 7810 28 Jul 05 06:46 LAG1 13 0 7 -8 +- 62 4 +- 36 2 7810 28 Jul 05 08:40 LAG2 20 0 12 -10 +- 41 3 +- 21 2 7810 28 Jul 05 10:31 LAG1 8 0 20 -20 +- 123 0 +- 150 2 7810 28 Jul 05 12:53 LAG2 21 0 14 -13 +- 40 3 +- 25 3 7810 28 Jul 05 17:17 LAG2 9 0 17 -6 +- 166 -7 +- 112 3 7810 28 Jul 05 18:45 LAG1 14 0 18 -16 +- 59 2 +- 56 2 7810 28 Jul 05 22:25 LAG1 8 0 10 -8 +- 67 -1 +- 34 4 7810 29 Jul 05 05:13 LAG1 18 0 16 -16 +- 43 0 +- 23 3 7810 29 Jul 05 06:52 LAG2 12 0 13 -2 +- 55 -9 +- 36 1 7810 29 Jul 05 08:44 LAG1 21 0 16 -13 +- 40 -4 +- 25 5 7810 30 Jul 05 13:01 LAG2 2 0 2 -658 +-9999 -259 +-9999 0 7810 30 Jul 05 19:34 LAG1 19 0 20 14 +- 41 0 +- 30 14 7810 30 Jul 05 23:21 LAG1 14 0 6 7 +- 61 -2 +- 37 3 7810 31 Jul 05 02:43 LAG1 17 0 10 8 +- 47 1 +- 31 3 7810 31 Jul 05 05:57 LAG1 19 0 15 -15 +- 45 0 +- 24 2 7810 31 Jul 05 07:23 LAG2 11 0 24 -3 +- 82 -12 +- 49 3 7810 31 Jul 05 09:39 LAG1 15 0 17 -17 +- 47 -1 +- 35 5 7810 31 Jul 05 11:10 LAG2 12 0 6 -3 +- 81 -6 +- 61 2 7810 1 Aug 05 05:18 LAG2 9 0 28 26 +- 135 -1 +- 120 2 7810 1 Aug 05 08:09 LAG1 23 0 14 -10 +- 39 -4 +- 19 2 7810 1 Aug 05 09:06 LAG2 19 0 3 0 +- 46 0 +- 25 3 7810 3 Aug 05 14:01 LAG2 9 0 12 27 +- 244 -9 +- 127 4 7810 3 Aug 05 17:47 LAG2 7 0 14 -11 +- 73 -7 +- 113 3 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 28 Jul 05 22:37 LAG1 8 0 16 24 +- 121 -8 +- 85 3 7811 29 Jul 05 01:49 LAG1 8 0 14 7 +- 91 1 +- 72 13 7811 1 Aug 05 20:29 LAG1 14 0 13 11 +- 49 0 +- 37 6 7811 1 Aug 05 23:57 LAG1 16 0 21 19 +- 45 3 +- 30 7 7811 2 Aug 05 22:37 LAG1 15 0 26 24 +- 47 2 +- 32 9 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 29 Jul 05 02:19 LAG1 8 0 40 45 +- 120 -3 +- 84 1 7824 29 Jul 05 08:49 LAG1 6 0 60 62 +- 53 -5 +- 25 3 7824 29 Jul 05 10:53 LAG2 8 0 79 69 +- 79 -11 +- 77 8 7824 29 Jul 05 21:09 LAG1 19 0 63 54 +- 28 -10 +- 17 25 7824 30 Jul 05 00:53 LAG1 3 0 68 57 +- 169 -22 +- 304 1 7824 30 Jul 05 19:57 LAG1 12 0 47 50 +- 48 -4 +- 40 7 7824 30 Jul 05 23:17 LAG1 22 0 58 39 +- 26 -14 +- 13 33 7824 31 Jul 05 02:55 LAG1 3 0 51 91 +- 268 73 +- 457 0 7824 31 Jul 05 21:55 LAG1 18 0 50 31 +- 29 -13 +- 13 29 7824 1 Aug 05 20:35 LAG1 16 0 53 53 +- 30 1 +- 17 9 7824 2 Aug 05 07:09 LAG1 2 0 61 61 +- 369 0 +- 832 0 7824 2 Aug 05 22:53 LAG1 11 0 78 77 +- 37 0 +- 23 6 7824 3 Aug 05 21:51 LAG1 6 0 61 87 +- 296 -12 +- 137 2 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 27 Jul 05 03:17 LAG1 12 0 8 2 +- 15 -7 +- 13 3 7825 27 Jul 05 06:35 LAG1 7 0 25 14 +- 16 15 +- 26 15 7825 27 Jul 05 08:19 LAG2 17 0 8 0 +- 10 6 +- 7 3 7825 27 Jul 05 09:43 LAG1 16 0 7 -8 +- 13 -1 +- 7 3 7825 27 Jul 05 12:15 LAG2 21 0 15 6 +- 9 -6 +- 5 7 7825 27 Jul 05 13:33 LAG1 9 0 12 2 +- 14 -13 +- 28 10 7825 27 Jul 05 16:31 LAG2 21 0 7 1 +- 9 -4 +- 5 1 7825 27 Jul 05 20:45 LAG2 9 0 7 9 +- 19 4 +- 15 4 7825 27 Jul 05 22:15 LAG1 14 0 10 -8 +- 12 -9 +- 10 3 7825 28 Jul 05 02:01 LAG1 12 0 9 -11 +- 19 2 +- 11 4 7825 28 Jul 05 05:21 LAG1 6 0 7 7 +- 20 0 +- 41 1 7825 28 Jul 05 14:33 LAG2 22 0 10 -6 +- 9 -4 +- 7 6 7825 28 Jul 05 18:43 LAG2 6 0 9 9 +- 22 4 +- 12 6 7825 29 Jul 05 00:41 LAG1 3 0 5 -3 +- 24 -10 +- 89 1 7825 29 Jul 05 16:59 LAG2 21 0 7 1 +- 9 -5 +- 7 2 7825 29 Jul 05 20:55 LAG2 15 0 10 -5 +- 11 5 +- 7 2 7825 29 Jul 05 23:05 LAG1 12 0 11 -8 +- 12 2 +- 6 6 7825 30 Jul 05 02:35 LAG1 17 1 22 -1 +- 11 -10 +- 7 16 7825 30 Jul 05 05:55 LAG1 6 1 13 -5 +- 18 -11 +- 21 6 7825 30 Jul 05 06:53 LAG2 10 0 16 14 +- 13 7 +- 24 4 7825 30 Jul 05 09:09 LAG1 23 0 11 -3 +- 8 5 +- 4 3 7825 30 Jul 05 10:35 LAG2 27 0 7 6 +- 8 -1 +- 4 3 7825 30 Jul 05 12:51 LAG1 16 0 9 -1 +- 10 8 +- 10 4 7825 30 Jul 05 14:49 LAG2 24 0 10 5 +- 8 -6 +- 6 2 7825 30 Jul 05 18:59 LAG2 27 0 16 11 +- 8 5 +- 4 4 7825 30 Jul 05 21:41 LAG1 12 0 7 -3 +- 15 0 +- 15 7 7825 31 Jul 05 01:08 LAG1 20 0 18 -10 +- 9 -7 +- 5 5 7825 31 Jul 05 04:52 LAG1 7 0 13 -2 +- 35 -9 +- 34 4 7825 31 Jul 05 07:51 LAG1 17 0 14 -10 +- 10 -9 +- 7 2 7825 31 Jul 05 08:42 LAG2 24 0 8 3 +- 8 -5 +- 5 2 7825 31 Jul 05 11:21 LAG1 18 0 8 -2 +- 9 4 +- 5 2 7825 31 Jul 05 12:47 LAG2 16 0 17 7 +- 12 -9 +- 10 1 7825 1 Aug 05 03:21 LAG1 11 0 9 1 +- 14 -8 +- 14 4 7825 1 Aug 05 06:39 LAG1 6 0 13 5 +- 17 -7 +- 11 5 7825 1 Aug 05 07:11 LAG2 11 0 16 13 +- 18 4 +- 22 2 7825 1 Aug 05 10:09 LAG1 12 0 9 -7 +- 12 4 +- 10 2 7825 1 Aug 05 10:49 LAG2 24 0 5 3 +- 8 2 +- 5 2 7825 1 Aug 05 15:15 LAG2 22 0 5 4 +- 9 -2 +- 7 3 7825 1 Aug 05 19:11 LAG2 27 0 16 13 +- 8 5 +- 4 5 7825 2 Aug 05 02:01 LAG1 17 0 14 3 +- 10 -8 +- 6 7 7825 2 Aug 05 05:43 LAG1 4 0 6 10 +- 125 -8 +- 97 5 7825 2 Aug 05 08:37 LAG1 12 0 17 -21 +- 16 -3 +- 9 2 7825 2 Aug 05 09:09 LAG2 19 0 2 0 +- 11 -1 +- 8 1 7825 2 Aug 05 12:13 LAG1 13 0 14 -12 +- 12 1 +- 10 3 7825 2 Aug 05 13:03 LAG2 24 0 6 0 +- 8 -4 +- 6 2 7825 3 Aug 05 00:57 LAG1 8 0 19 -11 +- 30 -4 +- 21 9 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 27 Jul 05 07:05 LAG2 10 0 17 -6 +- 49 -8 +- 37 1 7832 27 Jul 05 15:11 LAG2 11 0 8 -15 +- 43 -10 +- 28 3 7832 27 Jul 05 16:47 LAG1 7 0 7 -13 +- 62 -5 +- 52 1 7832 30 Jul 05 05:30 LAG2 3 0 11 -18 +- 348 4 +- 211 0 7832 30 Jul 05 16:19 LAG1 3 0 11 -3 +- 179 -17 +- 232 5 7832 30 Jul 05 19:49 LAG1 7 0 14 7 +- 36 -8 +- 39 4 7832 31 Jul 05 03:29 LAG2 5 2 12 13 +- 116 -3 +- 206 3 7832 31 Jul 05 06:03 LAG1 10 0 9 -13 +- 60 10 +- 30 4 7832 31 Jul 05 15:45 LAG2 11 0 11 -9 +- 22 -12 +- 26 2 7832 31 Jul 05 18:23 LAG1 6 0 11 20 +- 103 15 +- 58 5 7832 31 Jul 05 21:53 LAG1 11 0 18 17 +- 19 -2 +- 25 4 7832 1 Aug 05 01:27 LAG2 12 0 27 24 +- 20 6 +- 30 6 7832 1 Aug 05 05:27 LAG2 15 0 4 4 +- 20 -4 +- 16 1 7832 1 Aug 05 13:57 LAG2 15 0 8 -6 +- 20 0 +- 15 3 7832 1 Aug 05 16:55 LAG1 7 0 13 -34 +- 141 -10 +- 71 0 7832 1 Aug 05 20:35 LAG1 7 0 7 0 +- 37 -7 +- 42 4 7832 3 Aug 05 01:39 LAG2 7 0 12 11 +- 24 4 +- 36 4 7832 3 Aug 05 02:03 LAG1 5 0 15 15 +- 81 -1 +- 95 4 7832 3 Aug 05 05:07 LAG1 8 0 8 -18 +- 83 -9 +- 42 6 7832 3 Aug 05 05:35 LAG2 17 0 24 -1 +- 16 -20 +- 13 3 7832 3 Aug 05 14:05 LAG2 11 0 4 -1 +- 23 -3 +- 22 3 7832 3 Aug 05 17:41 LAG1 7 0 7 -26 +- 193 -12 +- 79 4 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 27 Jul 05 00:21 LAG1 11 1 15 17 +- 35 10 +- 33 4 7838 27 Jul 05 03:27 LAG2 16 0 37 36 +- 24 -2 +- 21 10 7838 27 Jul 05 07:34 LAG2 9 0 44 43 +- 32 2 +- 18 9 7838 27 Jul 05 12:45 LAG1 20 0 45 36 +- 21 -14 +- 11 8 7838 27 Jul 05 16:15 LAG1 14 0 47 37 +- 26 -17 +- 22 6 7838 28 Jul 05 01:34 LAG2 9 0 53 49 +- 33 6 +- 33 10 7838 28 Jul 05 05:38 LAG2 7 1 28 47 +- 100 19 +- 75 12 7838 28 Jul 05 09:48 LAG2 11 0 36 30 +- 32 9 +- 33 9 7838 28 Jul 05 11:24 LAG1 18 0 24 20 +- 22 7 +- 15 7 7838 28 Jul 05 14:59 LAG1 16 0 30 22 +- 24 -18 +- 17 6 7838 29 Jul 05 07:54 LAG2 13 0 32 32 +- 26 -2 +- 18 5 7838 31 Jul 05 14:20 LAG1 9 0 39 31 +- 77 -4 +- 45 3 7838 1 Aug 05 10:20 LAG2 9 0 27 31 +- 40 -12 +- 56 5 7838 1 Aug 05 13:08 LAG1 4 0 35 53 +- 88 23 +- 85 2 7838 3 Aug 05 02:21 LAG2 13 0 44 33 +- 30 16 +- 32 7 7838 3 Aug 05 10:19 LAG1 13 0 11 -3 +- 26 -9 +- 30 7 7838 3 Aug 05 13:49 LAG1 17 0 10 7 +- 23 -2 +- 14 6 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 27 Jul 05 06:53 LAG2 9 0 5 0 +- 14 -7 +- 20 0 7839 27 Jul 05 07:49 LAG1 18 0 7 -6 +- 9 1 +- 5 1 7839 27 Jul 05 10:43 LAG2 19 0 5 -4 +- 9 0 +- 5 3 7839 27 Jul 05 14:47 LAG2 21 0 1 -1 +- 9 0 +- 4 1 7839 27 Jul 05 20:19 LAG1 14 0 12 2 +- 14 -7 +- 8 1 7839 27 Jul 05 23:43 LAG1 12 0 7 -4 +- 12 2 +- 6 2 7839 28 Jul 05 03:07 LAG1 18 0 17 -11 +- 9 7 +- 5 1 7839 28 Jul 05 04:55 LAG2 12 0 8 9 +- 14 0 +- 15 0 7839 28 Jul 05 08:46 LAG2 20 0 9 3 +- 9 4 +- 5 2 7839 28 Jul 05 10:33 LAG1 5 0 3 -1 +- 44 -3 +- 79 1 7839 28 Jul 05 12:57 LAG2 24 0 4 -1 +- 8 2 +- 5 1 7839 28 Jul 05 18:53 LAG1 17 0 4 0 +- 11 -3 +- 9 1 7839 28 Jul 05 22:17 LAG1 21 0 8 -2 +- 9 -3 +- 4 2 7839 29 Jul 05 01:55 LAG1 17 0 3 1 +- 11 1 +- 7 1 7839 29 Jul 05 05:11 LAG1 18 0 3 -2 +- 9 0 +- 5 1 7839 29 Jul 05 06:55 LAG2 18 0 9 4 +- 10 -5 +- 5 1 7839 29 Jul 05 08:47 LAG1 19 0 8 -5 +- 10 -3 +- 6 1 7839 29 Jul 05 10:51 LAG2 20 0 4 -2 +- 9 1 +- 5 1 7839 29 Jul 05 15:23 LAG2 15 0 7 0 +- 22 -4 +- 12 1 7839 29 Jul 05 17:29 LAG1 6 0 13 -9 +- 24 11 +- 60 0 7839 29 Jul 05 21:13 LAG1 7 0 5 -5 +- 16 0 +- 22 0 7839 30 Jul 05 00:43 LAG1 12 0 4 -1 +- 17 3 +- 12 1 7839 1 Aug 05 17:31 LAG2 11 0 6 -5 +- 13 5 +- 12 0 7839 1 Aug 05 20:29 LAG1 20 0 5 -5 +- 9 0 +- 5 1 7839 1 Aug 05 23:57 LAG1 15 0 8 3 +- 11 3 +- 5 3 7839 2 Aug 05 03:17 LAG1 11 0 7 3 +- 16 5 +- 10 1 7839 2 Aug 05 06:49 LAG1 17 0 7 -4 +- 10 -3 +- 5 1 7839 2 Aug 05 07:27 LAG2 16 0 18 7 +- 10 -12 +- 7 0 7839 2 Aug 05 11:22 LAG2 21 0 10 2 +- 9 0 +- 5 10 7839 2 Aug 05 22:39 LAG1 15 0 7 6 +- 11 0 +- 6 2 7839 3 Aug 05 02:01 LAG1 12 0 10 10 +- 12 0 +- 8 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 28 Jul 05 22:21 LAG1 14 0 7 4 +- 22 -3 +- 11 4 7840 29 Jul 05 15:15 LAG2 12 0 6 5 +- 30 -6 +- 21 1 7840 29 Jul 05 21:11 LAG1 12 0 3 0 +- 21 -2 +- 18 2 7840 30 Jul 05 00:35 LAG1 19 0 6 4 +- 15 1 +- 8 3 7840 30 Jul 05 07:33 LAG1 4 0 6 13 +- 75 6 +- 50 1 7840 31 Jul 05 22:17 LAG1 2 0 8 -7 +- 761 9 +- 431 0 7840 2 Aug 05 03:51 LAG1 5 0 6 12 +- 159 -3 +- 88 0 7840 2 Aug 05 07:01 LAG1 6 0 9 2 +- 59 -5 +- 49 2 7840 2 Aug 05 10:47 LAG1 3 0 5 4 +- 59 38 +- 275 0 7840 2 Aug 05 11:33 LAG2 10 0 13 10 +- 22 -2 +- 15 8 7840 2 Aug 05 15:25 LAG2 15 0 3 2 +- 17 1 +- 10 2 7840 2 Aug 05 19:15 LAG1 5 0 6 6 +- 35 0 +- 102 0 7840 2 Aug 05 22:37 LAG1 11 0 8 -4 +- 20 -1 +- 8 5 7840 3 Aug 05 02:18 LAG1 3 0 14 12 +- 83 -3 +- 123 0 7840 3 Aug 05 05:39 LAG1 5 0 8 -6 +- 103 -10 +- 75 1 7840 3 Aug 05 09:25 LAG1 2 0 11 19 +- 122 -45 +- 587 0 7840 3 Aug 05 09:27 LAG2 17 0 17 17 +- 16 -4 +- 9 5 7840 3 Aug 05 13:33 LAG2 18 0 7 3 +- 15 2 +- 9 4 7840 3 Aug 05 21:13 LAG1 18 0 5 -5 +- 16 0 +- 10 1 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 28 Jul 05 06:59 LAG1 4 1 8 21 +- 156 -16 +- 124 7 7841 29 Jul 05 05:33 LAG1 7 0 3 4 +- 27 -4 +- 24 1 7841 1 Aug 05 20:23 LAG1 20 0 3 0 +- 9 0 +- 5 3 7841 2 Aug 05 00:03 LAG1 14 0 2 1 +- 11 0 +- 8 1 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 27 Jul 05 08:27 LAG1 4 0 17 122 +- 323 -45 +- 136 1 7941 27 Jul 05 23:55 LAG1 2 0 12 -17 +- 183 -5 +- 196 0 7941 28 Jul 05 03:25 LAG1 4 0 6 -8 +- 63 3 +- 76 4 7941 28 Jul 05 08:55 LAG2 4 0 4 2 +- 129 0 +- 98 3 7941 28 Jul 05 13:19 LAG2 10 0 5 0 +- 30 2 +- 18 2 7941 28 Jul 05 18:53 LAG1 11 0 4 -4 +- 17 0 +- 16 1 7941 28 Jul 05 22:21 LAG1 4 0 12 -3 +- 21 -4 +- 7 1 7941 29 Jul 05 02:01 LAG1 6 0 5 -5 +- 17 1 +- 34 2 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 27 Jul 05 05:04 LAG1 2 0 10 -192 +-1182 74 +- 437 0 8834 27 Jul 05 06:48 LAG2 7 3 21 -9 +- 298 -5 +- 140 2 8834 27 Jul 05 08:03 LAG1 9 0 18 -17 +- 15 0 +- 14 2 8834 27 Jul 05 10:52 LAG2 12 0 11 -8 +- 12 4 +- 12 5 8834 27 Jul 05 14:47 LAG2 4 0 10 4 +- 416 6 +- 179 2 8834 27 Jul 05 19:01 LAG2 7 0 26 -25 +- 24 -2 +- 35 2 8834 27 Jul 05 20:37 LAG1 5 0 29 -11 +- 130 -9 +- 68 2 8834 27 Jul 05 23:40 LAG1 8 0 23 -36 +- 58 -7 +- 28 7 8834 28 Jul 05 03:23 LAG1 4 0 25 -24 +- 21 4 +- 54 4 8834 28 Jul 05 05:11 LAG2 3 0 5 -5 +- 25 -11 +- 142 1 8834 28 Jul 05 07:03 LAG1 3 0 13 -65 +- 274 41 +- 150 6 8834 28 Jul 05 08:51 LAG2 10 0 11 2 +- 14 6 +- 9 6 8834 28 Jul 05 13:01 LAG2 13 0 11 -2 +- 12 7 +- 9 5 8834 28 Jul 05 17:07 LAG2 5 0 11 -14 +- 30 -9 +- 58 3 8834 28 Jul 05 18:59 LAG1 3 0 25 -24 +- 50 2 +- 181 1 8834 28 Jul 05 22:51 LAG1 5 0 19 -25 +- 180 2 +- 75 4 8834 29 Jul 05 02:05 LAG1 2 0 14 -32 +- 75 -239 +- 731 0 8834 29 Jul 05 05:26 LAG1 1 0 21 0 +- 0 0 +- 0 0 8834 29 Jul 05 15:29 LAG2 2 0 18 9 +- 491 -23 +- 415 0 8834 31 Jul 05 21:57 LAG1 5 0 206 -6 +- 39 198 +- 38 2*CHK* 8834 1 Aug 05 01:21 LAG1 5 0 249 -1 +- 24 210 +- 20 3*CHK* 8834 1 Aug 05 05:14 LAG1 3 0 595 17 +- 317 219 +- 120 4 8834 1 Aug 05 08:17 LAG1 2 0 502 0 +- 816 264 +- 429 0 8834 1 Aug 05 09:17 LAG2 13 0 401 4 +- 14 279 +- 9 4*CHK* 8834 1 Aug 05 13:19 LAG2 11 0 11 0 +- 28 5 +- 17 8 8834 1 Aug 05 17:37 LAG2 5 1 9 -4 +- 37 2 +- 24 9 8834 1 Aug 05 20:39 LAG1 11 0 16 -3 +- 20 -7 +- 11 7 8834 2 Aug 05 00:08 LAG1 2 0 6 -15 +- 117 -12 +- 154 0 8834 3 Aug 05 21:25 LAG1 5 0 24 -25 +- 20 -4 +- 28 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 - 050730 0/ 30/ 0 0/ 20/ 0 50 1864 MD2LAS 050110 - 050803 0/ 70/ 0 0/ 46/ 0 116 1873 SIMLAS 050316 - 050802 0/ 25/ 0 0/ 14/ 0 39 1884 RIGLAS 050104 - 050802 0/ 39/ 0 3/ 42/ 3 87 1893 CRMLAS 050723 - 050801 0/ 7/ 0 0/ 0/ 0 7 6405 TIGO 050104 - 050706 7/ 18/ 2 8/ 21/ 2 58 6810 ZIMLAT 050101 - 050805 201/120/ 21 166/ 70/ 18 596 7080 MLRS25 050101 - 050803 37/ 64/ 4 26/ 67/ 8 206 7090 ML0514 050101 - 050804 114/359/ 30 106/266/ 23 898 7105 ML0725 050108 - 050804 1/ 46/ 4 14/ 54/ 5 124 7110 ML0414 050118 - 050804 83/114/ 18 44/103/ 11 373 7124 ML0819 050118 - 050622 0/ 29/ 0 0/ 9/ 0 38 7237 CHALAS 050102 - 050803 0/ 60/ 1 0/ 71/ 0 132 7249 BEJLAS 050101 - 050729 0/ 61/ 0 0/ 69/ 0 130 7308 CRLLAS 050111 - 050510 7/ 5/ 1 1/ 10/ 0 24 7355 TROS02 050603 - 050801 0/ 38/ 0 0/ 7/ 0 45 7405 TIGO 050105 - 050705 5/ 26/ 0 3/ 7/ 0 41 7501 ML0616 050117 - 050721 40/110/ 3 40/ 87/ 7 287 7806 METLAS 050301 - 050301 0/ 0/ 0 0/ 1/ 0 1 7810 ZIMLAT 050101 - 050805 179/119/ 19 159/ 64/ 17 557 7811 POLLAS 050111 - 050804 0/ 50/ 0 0/ 39/ 0 89 7824 SPNLAS 050108 - 050805 5/103/ 1 2/ 92/ 3 206 7825 STL3 050101 - 050804 229/316/ 30 179/221/ 23 998 7832 SALRO 050101 - 050803 75/177/ 12 111/176/ 19 570 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 - 050803 47/ 68/ 1 30/ 77/ 5 228 7839 AUSLAS 050103 - 050803 154/108/ 15 102/ 90/ 13 482 7840 RGOLAS 050102 - 050804 177/105/ 21 123/ 90/ 20 536 7841 GFZLA3 050105 - 050804 45/ 42/ 10 17/ 61/ 8 183 7848 FTLR06 050515 - 050719 4/ 30/ 0 3/ 10/ 0 47 7941 MLROnn 050102 - 050805 51/ 89/ 6 74/ 92/ 18 330 8834 WLRS01 050109 - 050805 161/118/ 19 139/103/ 19 559 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050728.0 -9.0 +/- 0.1 420.0 +/- 0.1 -32658.62 +/- 0.01 050729.0 -7.9 +/- 0.1 419.2 +/- 0.1 -32658.16 +/- 0.02 050730.0 -6.4 +/- 0.1 420.4 +/- 0.1 -32657.64 +/- 0.02 050731.0 -3.9 +/- 0.1 419.7 +/- 0.2 -32656.75 +/- 0.03 050801.0 -2.7 +/- 0.1 420.8 +/- 0.1 -32655.82 +/- 0.03 050802.0 -1.0 +/- 0.1 421.4 +/- 0.1 -32654.83 +/- 0.04 050803.0 0.8 +/- 0.1 421.5 +/- 0.1 -32653.75 +/- 0.04 -------------------------------------------------------------- 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 ******************************************************************************** |