| Date: | 2005-12-02 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6446: Delft QL Report December 02, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-12-02 13:15:00 UTC Message No. 6446 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report December 02, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS December 2, 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 Fri, Dec 2, 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 Fri, Dec 2, 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) 051130 - 051201 2 2 1884 Riga, Latvia 051201 - 051202 4 3 6405 Concepcion, Chile (TIGO 847) 051129 - 051201 4 3 6810 Zimmerwald 846, Switzerland 051201 - 051202 4 4 7080 McDonald Obs., Fort Davis, TX 051201 - 051201 1 1 7090 Yarragadee, Australia 051130 - 051201 4 4 7105 Greenbelt, Maryland 051201 - 051201 1 1 7110 Monument Peak, California 051130 - 051201 4 3 7231 Wuhan, China (new) 051130 - 051130 1 - 7237 Changchun, China 051130 - 051201 4 3 7249 Beijing, China 051130 - 051201 6 6 7810 Zimmerwald 423, Switzerland 051201 - 051202 4 4 7811 Borowiec, Poland 051201 - 051201 2 1 7824 San Fernando, Spain 051130 - 051130 1 1 7825 Mount Stromlo, Australia 051130 - 051201 3 3 7832 Riyad, Saudi Arabia 051130 - 051130 1 2 7838 Simosato Observatory, Japan 051130 - 051201 2 1 7841 Potsdam, Germany 051201 - 051201 2 1 8834 Wettzell, Germany 051201 - 051202 4 4 ------ ------ --- --- TOTAL 051129 - 051202 54 47 ------------------------------------------------------------------------------ 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 Thu, Nov 24, 2005 to Fri, Dec 2, 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 23 21 Number of Passes 196/192 172/171 Number of Normal Points 2134/2084 1956/1945 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 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 25 Nov 05 16:35 LAG2 11 0 61 -25 +- 190 17 +- 124 44 1864 26 Nov 05 18:49 LAG2 6 0 18 13 +- 247 6 +- 147 9 1864 26 Nov 05 19:25 LAG1 4 0 48 30 +- 561 33 +-1036 13 1864 28 Nov 05 14:59 LAG2 9 0 26 -20 +- 201 3 +- 134 14 1864 28 Nov 05 16:43 LAG1 6 0 83 -91 +- 298 -43 +- 538 25 1864 30 Nov 05 19:18 LAG2 9 0 62 -54 +- 221 8 +- 163 12 1864 30 Nov 05 20:41 LAG1 11 0 81 -64 +- 200 15 +- 133 25 1864 1 Dec 05 17:21 LAG2 8 0 46 -4 +- 257 32 +- 205 15 1864 1 Dec 05 19:25 LAG1 8 0 70 -63 +- 248 8 +- 218 11 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 29 Nov 05 21:40 LAG2 1 0 124 0 +- 0 0 +- 0 0 1873 29 Nov 05 22:37 LAG1 3 0 145 181 +-2045 -24 +-1356 11 1873 30 Nov 05 01:37 LAG2 3 0 142 72 +-2363 35 +-1174 9 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 1 Dec 05 16:07 LAG1 20 0 26 23 +- 67 -4 +- 37 9 1884 1 Dec 05 17:19 LAG2 13 0 23 23 +- 84 1 +- 87 2 1884 1 Dec 05 19:39 LAG1 18 0 33 31 +- 70 1 +- 42 11 1884 1 Dec 05 21:15 LAG2 18 0 44 42 +- 72 4 +- 51 5 1884 1 Dec 05 23:07 LAG1 19 0 17 6 +- 68 -7 +- 38 8 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 28 Nov 05 13:09 LAG2 3 0 29 233 +- 431 135 +- 269 13 6405 29 Nov 05 09:57 LAG1 2 0 28 34 +- 949 31 +- 484 0 6405 30 Nov 05 08:31 LAG1 10 0 30 10 +- 21 0 +- 13 28 6405 30 Nov 05 13:43 LAG2 7 0 9 -21 +- 79 15 +- 54 6 6405 30 Nov 05 17:57 LAG2 4 0 24 -29 +- 121 58 +- 145 10 6405 30 Nov 05 18:49 LAG1 13 0 18 -13 +- 19 11 +- 13 5 6405 1 Dec 05 07:29 LAG1 6 0 20 35 +- 97 -19 +- 78 13 6405 1 Dec 05 11:28 LAG2 7 0 15 -29 +- 57 -27 +- 49 7 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 24 Nov 05 15:17 LAG1 13 0 18 0 +- 53 9 +- 30 4 6810 25 Nov 05 13:43 LAG1 21 0 12 -7 +- 40 6 +- 32 5 6810 25 Nov 05 16:19 LAG2 13 0 11 -12 +- 69 -3 +- 55 4 6810 25 Nov 05 17:17 LAG1 17 0 29 -26 +- 44 6 +- 19 4 6810 25 Nov 05 20:17 LAG2 12 0 27 -22 +- 56 4 +- 31 6 6810 25 Nov 05 20:49 LAG1 15 0 18 -18 +- 49 3 +- 28 4 6810 26 Nov 05 00:16 LAG1 18 0 27 -26 +- 43 0 +- 24 7 6810 26 Nov 05 00:34 LAG2 8 0 30 -30 +- 65 0 +- 37 4 6810 26 Nov 05 03:53 LAG1 11 0 16 -14 +- 55 -4 +- 47 4 6810 26 Nov 05 04:25 LAG2 18 0 21 -20 +- 43 0 +- 29 5 6810 26 Nov 05 15:53 LAG1 20 0 21 -20 +- 40 -1 +- 17 3 6810 26 Nov 05 18:15 LAG2 17 0 24 -23 +- 45 -5 +- 27 5 6810 26 Nov 05 19:27 LAG1 18 0 21 -18 +- 45 3 +- 25 3 6810 26 Nov 05 22:25 LAG2 17 0 23 -23 +- 45 -1 +- 25 4 6810 26 Nov 05 23:05 LAG1 11 0 23 -14 +- 100 -4 +- 48 5 6810 27 Nov 05 02:15 LAG1 19 0 22 -15 +- 43 -8 +- 19 4 6810 27 Nov 05 02:29 LAG2 15 0 22 -16 +- 49 -4 +- 23 3 6810 1 Dec 05 16:07 LAG1 24 0 17 -14 +- 38 -6 +- 18 2 6810 1 Dec 05 16:54 LAG2 16 0 24 -23 +- 46 7 +- 30 3 6810 1 Dec 05 19:41 LAG1 15 0 26 -25 +- 47 3 +- 29 3 6810 1 Dec 05 20:54 LAG2 12 0 15 -13 +- 55 0 +- 35 8 6810 1 Dec 05 23:07 LAG1 16 0 36 -34 +- 46 -3 +- 22 3 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 30 Nov 05 03:01 LAG1 4 0 14 80 +- 273 -49 +- 167 11 7080 30 Nov 05 04:13 LAG2 11 0 14 -1 +- 21 -10 +- 17 5 7080 30 Nov 05 08:30 LAG2 14 0 13 -7 +- 18 7 +- 10 3 7080 30 Nov 05 09:15 LAG1 5 0 4 -7 +- 133 -1 +- 72 2 7080 1 Dec 05 06:23 LAG2 22 0 12 -3 +- 14 -8 +- 10 4 7080 1 Dec 05 07:57 LAG1 12 0 20 -21 +- 20 -6 +- 16 5 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 24 Nov 05 01:51 LAG2 12 0 11 -13 +- 19 3 +- 13 5 7090 24 Nov 05 05:11 LAG1 13 0 11 -12 +- 19 1 +- 13 3 7090 24 Nov 05 06:07 LAG2 18 0 4 -4 +- 12 4 +- 10 2 7090 24 Nov 05 08:21 LAG1 23 0 14 -9 +- 8 5 +- 4 3 7090 24 Nov 05 10:07 LAG2 20 0 6 4 +- 10 -4 +- 8 3 7090 24 Nov 05 20:55 LAG1 16 0 18 -14 +- 10 -4 +- 5 6 7090 24 Nov 05 23:36 LAG2 10 0 7 3 +- 14 -3 +- 7 5 7090 25 Nov 05 00:29 LAG1 11 0 3 -1 +- 13 -4 +- 16 1 7090 25 Nov 05 03:52 LAG1 6 0 11 -11 +- 17 10 +- 37 1 7090 25 Nov 05 04:05 LAG2 14 0 6 5 +- 14 -7 +- 16 3 7090 25 Nov 05 19:45 LAG1 3 0 10 -26 +- 127 -14 +- 109 0 7090 26 Nov 05 02:01 LAG2 5 0 21 24 +- 35 6 +- 67 4 7090 26 Nov 05 09:13 LAG1 16 0 13 -9 +- 10 5 +- 7 4 7090 26 Nov 05 10:21 LAG2 10 0 11 11 +- 13 -2 +- 12 1 7090 26 Nov 05 18:35 LAG1 8 0 8 -13 +- 39 4 +- 33 1 7090 26 Nov 05 19:59 LAG2 16 0 11 2 +- 10 13 +- 13 2 7090 26 Nov 05 21:45 LAG1 19 0 5 -3 +- 9 -1 +- 4 2 7090 26 Nov 05 23:50 LAG2 15 0 6 4 +- 10 0 +- 7 4 7090 27 Nov 05 08:17 LAG1 9 0 10 -22 +- 81 5 +- 34 1 7090 27 Nov 05 08:37 LAG2 15 0 2 -1 +- 16 0 +- 11 2 7090 28 Nov 05 06:22 LAG2 11 0 5 -3 +- 32 0 +- 23 2 7090 28 Nov 05 06:47 LAG1 12 0 16 -22 +- 27 17 +- 14 2 7090 28 Nov 05 10:09 LAG1 9 0 8 -6 +- 15 4 +- 25 3 7090 28 Nov 05 10:45 LAG2 3 0 4 3 +- 26 -4 +- 95 2 7090 28 Nov 05 19:05 LAG1 10 0 14 -16 +- 18 -3 +- 16 3 7090 29 Nov 05 00:17 LAG2 6 0 3 0 +- 17 0 +- 21 2 7090 29 Nov 05 04:37 LAG2 14 0 16 15 +- 14 -17 +- 12 5 7090 29 Nov 05 05:29 LAG1 7 0 12 3 +- 39 5 +- 28 3 7090 29 Nov 05 08:31 LAG2 12 0 3 -5 +- 30 -3 +- 19 1 7090 29 Nov 05 09:01 LAG1 11 0 12 -12 +- 42 0 +- 22 2 7090 29 Nov 05 17:53 LAG1 9 0 13 -10 +- 17 -6 +- 30 1 7090 29 Nov 05 21:05 LAG1 13 0 23 -20 +- 12 -9 +- 5 7 7090 30 Nov 05 02:32 LAG2 8 0 10 8 +- 14 -8 +- 33 3 7090 30 Nov 05 04:09 LAG1 8 0 4 7 +- 29 -5 +- 28 3 7090 30 Nov 05 06:35 LAG2 23 0 4 0 +- 8 -2 +- 6 2 7090 30 Nov 05 07:23 LAG1 17 0 7 -5 +- 11 2 +- 6 4 7090 30 Nov 05 10:49 LAG2 11 0 19 -17 +- 13 19 +- 19 3 7090 30 Nov 05 19:55 LAG1 11 0 18 -8 +- 12 8 +- 6 0 7090 30 Nov 05 20:17 LAG2 16 0 15 4 +- 10 10 +- 8 5 7090 30 Nov 05 23:39 LAG1 4 0 10 -21 +- 54 19 +- 68 4 7090 1 Dec 05 00:40 LAG2 9 0 11 -9 +- 32 0 +- 26 2 7090 1 Dec 05 04:37 LAG2 26 0 5 2 +- 8 -1 +- 6 4 7090 1 Dec 05 06:05 LAG1 17 0 16 0 +- 13 8 +- 7 3 7090 1 Dec 05 08:49 LAG2 23 0 8 -2 +- 8 5 +- 6 2 7090 1 Dec 05 09:33 LAG1 12 0 8 -7 +- 12 0 +- 10 4 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 26 Nov 05 00:53 LAG1 5 0 5 -2 +- 30 1 +- 21 3 7105 26 Nov 05 03:51 LAG2 8 0 6 -37 +- 88 -21 +- 47 1 7105 26 Nov 05 07:37 LAG1 2 0 4 -114 +- 965 -48 +- 406 0 7105 30 Nov 05 09:01 LAG2 2 0 7 64 +-1624 -52 +-1179 0 7105 1 Dec 05 07:09 LAG2 7 0 14 0 +- 106 -6 +- 51 2 7105 1 Dec 05 07:55 LAG1 6 0 16 -27 +- 45 -9 +- 33 1 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 24 Nov 05 10:27 LAG1 14 0 9 -9 +- 11 0 +- 5 3 7110 24 Nov 05 12:12 LAG2 2 0 2 -18 +- 422 10 +- 263 0 7110 29 Nov 05 07:27 LAG1 11 0 6 0 +- 17 -1 +- 15 6 7110 29 Nov 05 10:09 LAG2 21 0 6 0 +- 9 3 +- 5 3 7110 29 Nov 05 11:03 LAG1 11 0 11 14 +- 52 -10 +- 22 2 7110 29 Nov 05 23:05 LAG1 13 0 20 8 +- 11 -8 +- 5 7 7110 30 Nov 05 00:05 LAG2 15 0 7 -3 +- 10 -4 +- 9 3 7110 30 Nov 05 02:38 LAG1 17 0 3 -1 +- 10 0 +- 6 2 7110 30 Nov 05 08:17 LAG2 20 0 9 -8 +- 9 1 +- 7 3 7110 30 Nov 05 09:17 LAG1 22 0 13 -12 +- 8 -3 +- 5 3 7110 30 Nov 05 12:27 LAG2 7 1 25 -10 +- 19 10 +- 11 1 7110 30 Nov 05 13:08 LAG1 8 0 32 -50 +- 28 24 +- 29 2 7110 1 Dec 05 01:21 LAG1 19 0 15 7 +- 9 6 +- 5 2 7110 1 Dec 05 02:09 LAG2 9 0 11 -5 +- 14 4 +- 8 3 7110 1 Dec 05 04:59 LAG1 4 0 5 -11 +- 48 19 +- 94 1 7110 1 Dec 05 06:11 LAG2 11 0 15 11 +- 20 -2 +- 15 3 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 30 Nov 05 10:46 LAG1 2 0 11511 -5795 +-2446 -2649 +-1133 0*CHK* Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 24 Nov 05 10:57 LAG2 9 0 10 7 +- 52 -2 +- 50 6 7237 24 Nov 05 11:29 LAG1 9 0 50 56 +- 76 -7 +- 62 3 7237 24 Nov 05 14:53 LAG1 6 0 37 25 +- 99 18 +- 128 5 7237 24 Nov 05 15:03 LAG2 15 0 19 17 +- 52 -14 +- 34 9 7237 24 Nov 05 18:03 LAG1 1 0 10 0 +- 0 0 +- 0 0 7237 24 Nov 05 21:49 LAG1 3 0 60 62 +- 474 2 +- 612 3 7237 25 Nov 05 09:08 LAG2 5 0 39 -36 +- 69 -11 +- 87 7 7237 25 Nov 05 09:51 LAG1 15 0 16 14 +- 41 -5 +- 21 6 7237 25 Nov 05 12:53 LAG2 12 0 30 -5 +- 45 -17 +- 27 8 7237 25 Nov 05 13:23 LAG1 12 0 14 5 +- 44 -6 +- 31 10 7237 25 Nov 05 16:46 LAG1 10 0 17 13 +- 57 -4 +- 48 6 7237 25 Nov 05 17:15 LAG2 7 0 23 11 +- 58 -16 +- 52 5 7237 25 Nov 05 20:15 LAG1 13 0 31 27 +- 46 2 +- 31 10 7237 25 Nov 05 21:13 LAG2 9 0 30 26 +- 55 -7 +- 73 6 7237 26 Nov 05 15:39 LAG1 7 0 20 26 +- 87 -9 +- 65 7 7237 26 Nov 05 18:55 LAG1 10 0 26 25 +- 48 2 +- 27 4 7237 26 Nov 05 19:13 LAG2 13 0 29 23 +- 50 -17 +- 26 7 7237 27 Nov 05 09:27 LAG2 10 0 25 -20 +- 72 -4 +- 69 8 7237 27 Nov 05 10:48 LAG1 5 0 36 36 +- 68 -5 +- 53 6 7237 28 Nov 05 09:21 LAG1 13 0 32 13 +- 42 -15 +- 23 5 7237 28 Nov 05 11:25 LAG2 13 0 7 5 +- 49 -2 +- 31 5 7237 28 Nov 05 12:57 LAG1 12 0 13 10 +- 55 1 +- 40 5 7237 28 Nov 05 15:25 LAG2 13 0 44 20 +- 42 -24 +- 28 7 7237 28 Nov 05 16:11 LAG1 16 0 18 0 +- 38 8 +- 22 10 7237 28 Nov 05 19:37 LAG2 9 0 36 29 +- 51 -23 +- 45 5 7237 28 Nov 05 19:45 LAG1 10 0 49 41 +- 50 10 +- 34 7 7237 29 Nov 05 09:21 LAG2 19 0 26 10 +- 35 -17 +- 25 6 7237 29 Nov 05 11:25 LAG1 17 0 52 39 +- 37 -17 +- 22 6 7237 29 Nov 05 13:22 LAG2 19 0 45 14 +- 35 -25 +- 21 9 7237 29 Nov 05 14:51 LAG1 14 0 19 18 +- 42 0 +- 29 8 7237 29 Nov 05 17:31 LAG2 16 0 63 30 +- 38 -34 +- 22 10 7237 29 Nov 05 18:15 LAG1 16 0 38 34 +- 39 13 +- 22 11 7237 30 Nov 05 10:10 LAG1 7 0 40 22 +- 87 -13 +- 57 6 7237 30 Nov 05 11:41 LAG2 3 0 17 21 +- 149 9 +- 194 5 7237 1 Dec 05 12:23 LAG1 6 0 22 18 +- 62 -14 +- 75 5 7237 1 Dec 05 13:41 LAG2 13 0 22 17 +- 42 -6 +- 31 9 7237 1 Dec 05 15:37 LAG1 14 0 23 3 +- 41 -14 +- 29 5 7237 1 Dec 05 18:01 LAG2 9 0 31 29 +- 53 -23 +- 63 8 7237 1 Dec 05 19:11 LAG1 15 0 35 36 +- 41 -5 +- 25 7 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 24 Nov 05 10:45 LAG2 18 0 18 -12 +- 36 4 +- 29 11 7249 24 Nov 05 11:29 LAG1 13 0 24 6 +- 50 0 +- 35 23 7249 24 Nov 05 14:47 LAG2 11 0 36 -32 +- 46 4 +- 28 16 7249 24 Nov 05 14:58 LAG1 5 0 12 -11 +- 148 6 +- 177 10 7249 24 Nov 05 18:07 LAG1 14 0 15 0 +- 41 10 +- 30 5 7249 24 Nov 05 18:58 LAG2 20 0 20 -8 +- 34 10 +- 22 9 7249 24 Nov 05 21:45 LAG1 7 0 18 -5 +- 76 10 +- 99 13 7249 25 Nov 05 09:59 LAG1 15 0 11 6 +- 39 0 +- 22 9 7249 25 Nov 05 12:49 LAG2 13 0 22 -10 +- 48 4 +- 30 16 7249 25 Nov 05 13:40 LAG1 2 0 74 -72 +- 160 475 +- 692 0 7249 25 Nov 05 20:17 LAG1 16 0 27 -25 +- 38 2 +- 27 7 7249 25 Nov 05 21:07 LAG2 14 0 34 -25 +- 49 9 +- 39 9 7249 26 Nov 05 11:09 LAG2 9 0 12 10 +- 51 0 +- 73 6 7249 26 Nov 05 12:21 LAG1 3 0 33 -13 +- 107 66 +- 534 31 7249 26 Nov 05 15:13 LAG2 10 0 15 -10 +- 48 -2 +- 60 11 7249 26 Nov 05 19:23 LAG2 9 0 16 -1 +- 51 4 +- 51 15 7249 27 Nov 05 13:16 LAG2 3 0 27 8 +- 102 6 +- 69 22 7249 27 Nov 05 21:07 LAG1 9 0 18 10 +- 82 -8 +- 78 6 7249 27 Nov 05 21:31 LAG2 9 0 17 7 +- 69 7 +- 64 10 7249 28 Nov 05 11:35 LAG2 8 0 39 17 +- 196 13 +- 121 4 7249 28 Nov 05 13:01 LAG1 9 0 19 -14 +- 52 9 +- 66 13 7249 28 Nov 05 15:17 LAG2 6 0 46 -79 +- 138 -52 +- 103 30 7249 28 Nov 05 16:21 LAG1 9 0 14 10 +- 51 -2 +- 59 10 7249 28 Nov 05 19:35 LAG2 11 0 12 8 +- 47 -3 +- 49 7 7249 28 Nov 05 19:55 LAG1 10 0 27 13 +- 75 10 +- 56 6 7249 29 Nov 05 09:47 LAG2 4 0 10 -3 +- 695 -1 +- 504 9 7249 29 Nov 05 11:38 LAG1 10 0 25 3 +- 48 -19 +- 41 11 7249 29 Nov 05 13:23 LAG2 13 0 38 1 +- 45 -17 +- 40 32 7249 29 Nov 05 15:13 LAG1 4 0 15 3 +- 256 -16 +- 294 9 7249 29 Nov 05 17:29 LAG2 13 0 19 8 +- 48 -3 +- 35 17 7249 29 Nov 05 18:17 LAG1 12 0 15 -6 +- 59 2 +- 36 12 7249 29 Nov 05 21:34 LAG2 12 0 49 35 +- 55 -13 +- 53 16 7249 29 Nov 05 22:01 LAG1 6 0 38 37 +- 116 9 +- 185 19 7249 30 Nov 05 10:28 LAG1 1 0 28426 0 +- 0 0 +- 0 0 7249 30 Nov 05 11:41 LAG2 2 0 48162 125 +- 147 -99999 +- 945 0*CHK* 7249 30 Nov 05 17:03 LAG1 16 0 99999 105 +- 40 -99999 +- 25 19*CHK* 7249 30 Nov 05 20:07 LAG2 7 0 12 4 +- 260 0 +- 143 11 7249 30 Nov 05 20:41 LAG1 11 0 40 7 +- 57 31 +- 52 9 7249 1 Dec 05 09:44 LAG2 13 0 18 -5 +- 56 15 +- 49 11 7249 1 Dec 05 12:25 LAG1 12 0 14 -1 +- 44 -10 +- 42 8 7249 1 Dec 05 13:35 LAG2 14 0 30 0 +- 43 22 +- 35 11 7249 1 Dec 05 15:47 LAG1 12 0 12 3 +- 46 -8 +- 42 7 7249 1 Dec 05 17:46 LAG2 11 1 368 -363 +- 65 269 +- 43 196*CHK* 7249 1 Dec 05 19:05 LAG1 17 0 11 -5 +- 37 -2 +- 22 9 7249 1 Dec 05 22:01 LAG2 4 0 66 46 +- 77 -20 +- 317 48 Station 7358 (Tanegashima) (position solved, acc. 10 mm) 7358 24 Nov 05 07:53 LAG1 5 0 6 -13 +- 89 -5 +- 52 4 7358 28 Nov 05 05:59 LAG1 5 0 3 5 +- 52 5 +- 55 3 7358 29 Nov 05 08:09 LAG1 3 0 8 78 +- 310 41 +- 176 2 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 29 Nov 05 02:49 LAG1 8 0 17 5 +- 36 7 +- 22 2 7501 29 Nov 05 03:41 LAG2 2 0 8 24 +-1165 20 +- 707 0 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 24 Nov 05 15:16 LAG1 9 0 19 -5 +- 75 14 +- 69 1 7810 25 Nov 05 13:42 LAG1 20 0 12 -6 +- 42 6 +- 34 6 7810 25 Nov 05 16:29 LAG2 7 0 12 -12 +- 74 -1 +- 77 2 7810 25 Nov 05 17:17 LAG1 11 0 29 -22 +- 59 5 +- 25 5 7810 25 Nov 05 20:19 LAG2 9 0 23 -17 +- 72 5 +- 41 4 7810 25 Nov 05 20:49 LAG1 14 0 17 -17 +- 50 4 +- 29 2 7810 26 Nov 05 00:11 LAG1 17 0 18 -17 +- 44 0 +- 26 3 7810 26 Nov 05 00:43 LAG2 6 0 20 -15 +- 111 -3 +- 54 2 7810 26 Nov 05 03:53 LAG1 11 0 14 -5 +- 63 -7 +- 45 4 7810 26 Nov 05 04:25 LAG2 16 0 11 -10 +- 47 1 +- 30 5 7810 26 Nov 05 15:52 LAG1 21 0 19 -18 +- 40 -1 +- 16 3 7810 26 Nov 05 18:15 LAG2 18 0 21 -23 +- 47 -6 +- 27 2 7810 26 Nov 05 19:27 LAG1 18 0 21 -16 +- 45 4 +- 24 4 7810 26 Nov 05 22:25 LAG2 18 0 20 -20 +- 43 -2 +- 24 3 7810 26 Nov 05 23:05 LAG1 8 0 22 -19 +- 85 -1 +- 40 4 7810 27 Nov 05 02:17 LAG1 17 0 21 -17 +- 45 -7 +- 21 5 7810 27 Nov 05 02:29 LAG2 14 0 20 -16 +- 50 -4 +- 24 2 7810 1 Dec 05 16:07 LAG1 23 0 20 -19 +- 40 -6 +- 20 3 7810 1 Dec 05 17:07 LAG2 14 0 26 -28 +- 56 3 +- 40 4 7810 1 Dec 05 19:41 LAG1 17 0 32 -31 +- 44 1 +- 26 4 7810 1 Dec 05 21:13 LAG2 9 0 15 -14 +- 100 0 +- 57 3 7810 1 Dec 05 23:06 LAG1 18 0 43 -41 +- 43 -3 +- 21 3 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 29 Nov 05 20:58 LAG2 15 0 29 27 +- 47 -7 +- 40 8 7811 30 Nov 05 01:00 LAG2 15 0 23 18 +- 47 -4 +- 38 11 7811 30 Nov 05 01:56 LAG1 12 0 19 16 +- 54 0 +- 44 11 7811 1 Dec 05 16:15 LAG1 15 0 25 18 +- 47 -7 +- 29 13 7811 1 Dec 05 17:20 LAG2 12 0 15 8 +- 71 3 +- 64 10 7811 1 Dec 05 19:47 LAG1 4 0 28 0 +- 95 -7 +- 79 26 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 24 Nov 05 00:20 LAG2 7 0 43 40 +- 54 6 +- 75 3 7824 24 Nov 05 02:55 LAG1 10 0 65 60 +- 42 -4 +- 22 9 7824 24 Nov 05 04:19 LAG2 5 0 50 98 +- 369 27 +- 206 4 7824 24 Nov 05 18:12 LAG2 13 0 55 58 +- 35 -16 +- 35 2 7824 24 Nov 05 19:01 LAG1 12 0 70 66 +- 35 13 +- 30 8 7824 24 Nov 05 22:09 LAG2 14 0 53 49 +- 37 -7 +- 34 3 7824 24 Nov 05 22:41 LAG1 5 0 37 43 +- 264 -5 +- 155 13 7824 25 Nov 05 01:43 LAG1 9 0 42 40 +- 41 -7 +- 29 6 7824 25 Nov 05 02:25 LAG2 17 0 53 52 +- 29 1 +- 23 5 7824 25 Nov 05 06:49 LAG2 4 0 82 54 +- 407 21 +- 307 2 7824 25 Nov 05 21:27 LAG1 3 0 58 93 +- 968 -19 +- 552 0 7824 26 Nov 05 22:49 LAG2 2 0 58 154 +-1419 -92 +-1350 0 7824 29 Nov 05 21:01 LAG2 7 0 64 87 +- 137 -19 +- 109 2 7824 30 Nov 05 01:53 LAG1 11 0 53 53 +- 40 0 +- 31 5 7824 30 Nov 05 18:17 LAG1 3 0 248 -1528 +- 992 749 +- 425 20*CHK* 7824 30 Nov 05 23:05 LAG2 4 0 45 44 +- 121 0 +- 239 0 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 25 Nov 05 03:59 LAG1 4 0 17 -29 +- 291 5 +- 120 6 7825 25 Nov 05 04:16 LAG2 12 2 15 9 +- 13 -12 +- 17 9 7825 25 Nov 05 06:57 LAG1 10 0 7 -11 +- 30 -3 +- 20 2 7825 25 Nov 05 08:23 LAG2 9 0 17 -2 +- 16 -15 +- 28 15 7825 27 Nov 05 16:39 LAG1 16 0 9 0 +- 10 -5 +- 7 5 7825 27 Nov 05 20:29 LAG1 7 0 3 -5 +- 24 3 +- 24 2 7825 27 Nov 05 22:11 LAG2 19 0 8 -3 +- 9 3 +- 5 4 7825 30 Nov 05 02:48 LAG2 11 0 10 -1 +- 13 -9 +- 17 7 7825 30 Nov 05 03:43 LAG1 17 3 15 -1 +- 11 0 +- 7 15 7825 30 Nov 05 19:35 LAG1 16 0 42 -24 +- 10 15 +- 4 5 7825 30 Nov 05 20:27 LAG2 25 0 7 4 +- 8 1 +- 4 5 7825 1 Dec 05 06:03 LAG1 4 0 12 6 +- 24 -19 +- 60 0 7825 1 Dec 05 22:41 LAG2 20 1 9 0 +- 9 -1 +- 6 9 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 25 Nov 05 23:55 LAG1 13 0 12 11 +- 22 9 +- 15 5 7832 26 Nov 05 00:47 LAG2 10 0 8 8 +- 26 0 +- 14 3 7832 26 Nov 05 12:55 LAG1 5 0 9 0 +- 79 -5 +- 43 2 7832 26 Nov 05 14:23 LAG2 7 0 7 -19 +- 169 -13 +- 92 2 7832 26 Nov 05 18:33 LAG2 8 0 15 -20 +- 35 -10 +- 42 4 7832 26 Nov 05 22:39 LAG1 9 0 11 15 +- 30 7 +- 27 1 7832 26 Nov 05 22:57 LAG2 11 0 17 21 +- 35 5 +- 30 3 7832 27 Nov 05 02:13 LAG1 11 0 13 11 +- 25 1 +- 19 3 7832 27 Nov 05 03:01 LAG2 8 0 17 21 +- 63 4 +- 50 5 7832 27 Nov 05 11:33 LAG1 5 0 27 -2 +- 120 -20 +- 95 1 7832 27 Nov 05 14:43 LAG1 9 0 9 -13 +- 43 -11 +- 29 3 7832 27 Nov 05 16:35 LAG2 8 0 9 -10 +- 80 -1 +- 54 2 7832 27 Nov 05 20:55 LAG2 15 0 2 -1 +- 19 0 +- 22 2 7832 27 Nov 05 21:25 LAG1 9 0 11 -10 +- 22 4 +- 30 2 7832 28 Nov 05 00:41 LAG1 11 0 5 7 +- 38 4 +- 22 3 7832 28 Nov 05 01:03 LAG2 9 0 7 0 +- 91 -3 +- 47 4 7832 28 Nov 05 13:17 LAG1 8 0 7 -28 +- 111 -11 +- 49 3 7832 28 Nov 05 14:33 LAG2 10 0 3 0 +- 28 0 +- 19 3 7832 28 Nov 05 16:57 LAG1 5 0 23 -24 +- 36 -5 +- 90 4 7832 28 Nov 05 18:51 LAG2 9 0 19 -20 +- 53 0 +- 52 2 7832 28 Nov 05 23:17 LAG2 7 0 8 17 +- 56 13 +- 54 2 7832 28 Nov 05 23:31 LAG1 8 0 10 3 +- 23 11 +- 28 2 7832 29 Nov 05 03:15 LAG2 7 0 16 1 +- 74 -12 +- 63 3 7832 29 Nov 05 12:07 LAG1 12 0 15 15 +- 19 -8 +- 18 2 7832 29 Nov 05 15:27 LAG1 10 0 7 -2 +- 42 0 +- 28 6 7832 29 Nov 05 16:45 LAG2 7 0 6 -41 +- 169 -23 +- 92 2 7832 29 Nov 05 21:15 LAG2 11 0 4 -4 +- 25 -6 +- 33 3 7832 29 Nov 05 22:19 LAG1 10 0 7 -12 +- 43 7 +- 27 3 7832 30 Nov 05 01:25 LAG2 8 0 13 2 +- 43 -10 +- 37 2 7832 30 Nov 05 01:43 LAG1 7 0 5 -4 +- 25 5 +- 42 1 7832 30 Nov 05 14:21 LAG1 7 0 18 -20 +- 27 12 +- 35 3 7832 30 Nov 05 14:57 LAG2 8 0 17 -9 +- 29 8 +- 25 4 7832 30 Nov 05 19:05 LAG2 8 0 21 -19 +- 88 1 +- 74 1 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 24 Nov 05 07:50 LAG1 13 0 30 30 +- 27 -6 +- 15 5 7838 24 Nov 05 10:41 LAG2 14 0 33 40 +- 31 17 +- 18 4 7838 25 Nov 05 06:31 LAG1 7 0 21 14 +- 59 -5 +- 63 12 7838 25 Nov 05 08:47 LAG2 20 0 41 39 +- 21 8 +- 16 14 7838 25 Nov 05 13:00 LAG2 9 0 15 20 +- 71 7 +- 60 6 7838 25 Nov 05 16:47 LAG1 9 0 58 58 +- 35 0 +- 36 5 7838 26 Nov 05 11:15 LAG2 13 0 56 45 +- 36 10 +- 30 4 7838 27 Nov 05 13:20 LAG2 7 0 35 43 +- 74 14 +- 88 8 7838 27 Nov 05 17:25 LAG1 14 0 51 51 +- 26 7 +- 18 6 7838 28 Nov 05 05:54 LAG1 12 0 22 20 +- 29 -3 +- 21 10 7838 30 Nov 05 07:51 LAG2 8 0 46 29 +- 95 14 +- 78 7 7838 30 Nov 05 10:12 LAG1 13 0 35 33 +- 26 -10 +- 21 6 7838 30 Nov 05 11:47 LAG2 5 0 67 54 +- 51 27 +- 75 5 7838 30 Nov 05 16:42 LAG1 21 0 63 50 +- 21 27 +- 11 5 7838 1 Dec 05 08:49 LAG1 6 0 61 42 +- 47 -16 +- 30 7 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 24 Nov 05 22:19 LAG2 13 0 7 -2 +- 19 -3 +- 11 2 7840 24 Nov 05 22:27 LAG1 8 0 3 -1 +- 31 0 +- 19 2 7840 25 Nov 05 01:37 LAG1 21 0 9 -2 +- 14 -4 +- 7 4 7840 25 Nov 05 02:15 LAG2 19 0 5 4 +- 15 -1 +- 8 2 7840 25 Nov 05 05:21 LAG1 14 0 11 5 +- 17 -9 +- 16 2 7840 25 Nov 05 06:29 LAG2 7 0 6 -7 +- 29 4 +- 60 1 7840 26 Nov 05 18:31 LAG2 16 0 5 -5 +- 16 0 +- 14 1 7840 26 Nov 05 19:35 LAG1 11 0 9 8 +- 24 -1 +- 16 4 7840 26 Nov 05 22:23 LAG2 18 0 5 -4 +- 16 -1 +- 9 2 7840 26 Nov 05 22:59 LAG1 16 0 7 6 +- 16 -2 +- 10 4 7840 27 Nov 05 18:11 LAG1 11 0 7 1 +- 27 4 +- 16 2 7840 27 Nov 05 20:27 LAG2 22 0 5 2 +- 14 2 +- 8 2 7840 27 Nov 05 21:43 LAG1 7 0 14 -4 +- 50 6 +- 34 1 7840 28 Nov 05 18:38 LAG2 21 0 20 19 +- 14 1 +- 9 3 7840 28 Nov 05 20:21 LAG1 16 0 14 -5 +- 16 8 +- 9 2 7840 28 Nov 05 22:37 LAG2 23 0 10 6 +- 13 3 +- 8 4 7840 28 Nov 05 23:45 LAG1 14 0 7 1 +- 17 2 +- 9 4 7840 29 Nov 05 02:41 LAG2 23 0 8 -5 +- 13 -3 +- 8 3 7840 29 Nov 05 03:29 LAG1 15 0 10 -2 +- 22 -4 +- 14 2 7840 29 Nov 05 15:33 LAG1 9 0 29 29 +- 25 2 +- 29 3 7840 29 Nov 05 19:01 LAG1 8 0 9 9 +- 65 10 +- 37 1 7840 29 Nov 05 20:47 LAG2 22 0 10 7 +- 14 -4 +- 9 4 7840 30 Nov 05 00:54 LAG2 20 0 11 3 +- 15 -6 +- 9 4 7840 30 Nov 05 01:51 LAG1 19 0 5 -3 +- 15 -1 +- 7 2 7840 30 Nov 05 04:54 LAG2 16 0 10 -9 +- 16 -2 +- 15 1 7840 30 Nov 05 05:45 LAG1 8 0 13 -12 +- 25 -4 +- 41 2 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 25 Nov 05 17:47 LAG1 7 0 7 4 +- 98 0 +- 42 6 7841 25 Nov 05 21:23 LAG1 3 0 9 -103 +- 684 43 +- 267 0 7841 26 Nov 05 00:37 LAG2 5 0 11 19 +- 57 26 +- 53 1 7841 26 Nov 05 16:11 LAG1 10 0 5 3 +- 18 -3 +- 10 2 7841 26 Nov 05 18:35 LAG2 12 0 10 0 +- 13 0 +- 12 10 7841 26 Nov 05 19:29 LAG1 17 0 10 -4 +- 10 0 +- 6 9 7841 27 Nov 05 20:33 LAG2 11 1 7 0 +- 28 -4 +- 19 4 7841 27 Nov 05 21:39 LAG1 14 0 18 -6 +- 11 11 +- 8 7 7841 28 Nov 05 00:37 LAG2 9 0 18 57 +- 68 25 +- 33 13 7841 1 Dec 05 16:11 LAG1 18 0 17 7 +- 10 -8 +- 5 3 7841 1 Dec 05 17:23 LAG2 4 0 2 -2 +- 24 -1 +- 83 1 7841 1 Dec 05 19:43 LAG1 18 0 7 -6 +- 9 0 +- 6 3 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 24 Nov 05 00:17 LAG2 4 0 28 -45 +- 241 -8 +- 127 1 8834 24 Nov 05 15:17 LAG1 3 0 26 13 +- 205 27 +- 137 3 8834 26 Nov 05 00:25 LAG1 3 0 25 -18 +- 47 7 +- 52 0 8834 26 Nov 05 03:54 LAG1 7 0 7 -12 +- 32 -6 +- 31 2 8834 26 Nov 05 04:29 LAG2 9 0 14 -12 +- 31 0 +- 25 7 8834 27 Nov 05 14:43 LAG1 13 0 9 -8 +- 12 0 +- 9 3 8834 27 Nov 05 16:33 LAG2 19 0 5 -2 +- 11 0 +- 8 4 8834 27 Nov 05 18:19 LAG1 5 0 38 -33 +- 38 6 +- 43 2 8834 1 Dec 05 03:21 LAG2 1 0 29 0 +- 0 0 +- 0 0 8834 1 Dec 05 04:23 LAG1 5 0 12 -8 +- 39 -6 +- 67 4 8834 1 Dec 05 12:49 LAG1 4 0 16 -16 +- 21 -9 +- 75 2 8834 1 Dec 05 16:15 LAG1 9 0 5 -6 +- 31 -2 +- 18 4 8834 1 Dec 05 17:23 LAG2 2 0 20 -15 +- 48 -50 +- 402 0 8834 1 Dec 05 19:59 LAG1 3 0 14 -16 +- 28 14 +- 90 1 8834 1 Dec 05 21:15 LAG2 8 0 4 -2 +- 14 0 +- 16 3 -------------------------------------------------------------------------------- Distribution of daytime, nighttime and twilight passes since Jan 1, 2003: -------------------------------------------------------------------------- Station System Period Number of Passes LAGEOS-1 LAGEOS-2 Day/Night/Twil. Day/Night/Twil. Total -------------------------------------------------------------------------- 1824 KIEVLA 051005 - 051102 0/ 9/ 0 0/ 3/ 0 12 1831 LVIL 050703 - 051103 0/ 68/ 0 0/ 15/ 0 83 1864 MD2LAS 050701 - 051201 0/110/ 0 0/ 42/ 0 152 1873 SIMLAS 050701 - 051130 0/ 55/ 0 0/ 11/ 0 66 1884 RIGLAS 050703 - 051202 0/ 94/ 0 0/ 22/ 0 116 1893 CRMLAS 050723 - 051013 0/ 17/ 0 0/ 0/ 0 17 6405 TIGO 050705 - 051201 48/ 12/ 3 43/ 32/ 3 141 6810 ZIMLAT 050701 - 051202 100/204/ 21 142/109/ 17 593 7080 MLRS25 050701 - 051201 7/ 64/ 1 9/ 46/ 3 130 7090 ML0514 050701 - 051201 145/136/ 30 110/211/ 17 649 7105 ML0725 050704 - 051201 13/ 87/ 10 21/ 48/ 7 186 7110 ML0414 050701 - 051201 44/172/ 25 51/ 81/ 7 380 7124 ML0819 050818 - 051102 1/ 14/ 2 1/ 32/ 1 51 7130 TL04** 050803 - 051103 8/ 26/ 1 12/ 10/ 2 59 7231 WUHA01 051130 - 051130 0/ 1/ 0 0/ 0/ 0 1 7237 CHALAS 050706 - 051201 0/143/ 2 0/ 89/ 0 234 7249 BEJLAS 050703 - 051201 0/ 82/ 0 0/ 47/ 0 129 7355 TROS02 050701 - 050906 0/ 24/ 0 0/ 0/ 0 24 7358 GMSL 050802 - 051129 7/ 16/ 0 2/ 8/ 0 33 7405 TIGO 050705 - 051107 2/ 5/ 0 0/ 9/ 0 16 7501 ML0616 050701 - 051129 17/ 41/ 5 8/ 63/ 2 136 7810 ZIMLAT 050701 - 051202 99/201/ 21 143/107/ 18 589 7811 POLLAS 050704 - 051201 0/ 88/ 0 0/ 23/ 0 111 7824 SPNLAS 050701 - 051130 10/141/ 8 10/ 69/ 7 245 7825 STL3 050702 - 051201 258/100/ 19 120/166/ 20 683 7832 SALRO 050702 - 051130 80/195/ 24 95/130/ 17 541 7835 GRASSE 050701 - 050705 0/ 3/ 0 0/ 2/ 0 5 7838 SHOLAS 050714 - 051201 15/ 83/ 5 19/ 56/ 4 182 7839 AUSLAS 050702 - 051123 53/123/ 21 95/ 47/ 4 343 7840 RGOLAS 050702 - 051130 70/196/ 24 109/ 78/ 8 485 7841 GFZLA3 050713 - 051201 8/ 85/ 7 7/ 29/ 2 138 7848 FTLR06 050515 - 051027 6/ 48/ 2 5/ 22/ 4 87 7941 MLROnn 050701 - 051121 44/126/ 11 64/ 48/ 9 302 8834 WLRS01 050702 - 051202 78/163/ 26 110/ 73/ 10 460 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 051125.0 65.5 +/- 0.1 388.3 +/- 0.1 -32696.64 +/- 0.02 051126.0 67.2 +/- 0.1 388.4 +/- 0.1 -32697.48 +/- 0.04 051127.0 67.4 +/- 0.1 388.4 +/- 0.1 -32698.40 +/- 0.05 051128.0 68.2 +/- 0.1 388.4 +/- 0.1 -32699.27 +/- 0.07 051129.0 68.5 +/- 0.1 389.3 +/- 0.1 -32700.10 +/- 0.08 051130.0 68.6 +/- 0.1 389.4 +/- 0.1 -32700.80 +/- 0.08 051201.0 67.6 +/- 0.1 389.8 +/- 0.1 -32701.28 +/- 0.09 -------------------------------------------------------------- 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 ******************************************************************************** |