| Date: | 2005-01-27 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4868: Delft QL Report January 27, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-01-27 13:15:00 UTC Message No. 4868 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report January 27, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS January 27, 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, Jan 27, 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, Jan 27, 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 ------------------------------------------------------------------------------ 6405 Concepcion, Chile (TIGO 847) 050125 - 050126 3 3 6810 Zimmerwald 846, Switzerland 050127 - 050127 1 - 7080 McDonald Obs., Fort Davis, TX 050125 - 050125 1 - 7090 Yarragadee, Australia 050125 - 050126 5 4 7237 Changchun, China 050126 - 050126 1 1 7405 Concepcion, Chile (TIGO 424) 050125 - 050126 4 - 7501 Hartebeesthoek, SA (MOB-6) 050125 - 050126 1 2 7810 Zimmerwald 423, Switzerland 050127 - 050127 1 - 7825 Mount Stromlo, Australia 050125 - 050126 5 4 7835 Grasse, France 050127 - 050127 1 1 7838 Simosato Observatory, Japan 041001 - 041005 - 2 7840 Herstmonceux, United Kingdom 050125 - 050126 2 1 8834 Wettzell, Germany 050127 - 050127 1 - ------ ------ --- --- TOTAL 041001 - 050127 26 18 ------------------------------------------------------------------------------ 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, Jan 19, 2005 to Thu, Jan 27, 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 19 Number of Passes 123/123 88/ 88 Number of Normal Points 1302/1288 0979/ 976 Weighted RMS of Fit (mm) 13 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 1824 (Kiev) (position solved, acc. 200 mm) 1824 23 Jan 05 02:31 LAG2 1 0 0 0 +- 0 0 +- 0 0 1824 23 Jan 05 03:21 LAG1 3 0 13 -1 +-1352 1 +- 940 13 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 19 Jan 05 15:39 LAG1 6 0 41 40 +- 124 -10 +- 239 4 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 19 Jan 05 00:16 LAG2 4 0 10 -16 +- 86 10 +- 119 2 6405 19 Jan 05 04:02 LAG2 17 0 12 -1 +- 16 -6 +- 9 4 6405 19 Jan 05 08:12 LAG2 7 0 15 -32 +- 86 -13 +- 64 2 6405 25 Jan 05 04:47 LAG2 16 0 14 -7 +- 16 5 +- 7 3 6405 25 Jan 05 21:11 LAG1 9 0 18 6 +- 40 10 +- 34 4 6405 26 Jan 05 00:23 LAG1 7 0 12 2 +- 30 5 +- 14 6 6405 26 Jan 05 03:25 LAG2 6 0 7 -6 +- 181 0 +- 104 2 6405 26 Jan 05 03:51 LAG1 8 0 10 -17 +- 40 -13 +- 40 2 6405 26 Jan 05 06:57 LAG2 7 0 28 -30 +- 129 -32 +- 74 7 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 19 Jan 05 15:17 LAG1 12 0 17 -15 +- 97 0 +- 51 4 6810 22 Jan 05 11:36 LAG1 7 0 14 -16 +- 93 3 +- 53 3 6810 22 Jan 05 12:01 LAG2 20 0 27 -15 +- 48 -11 +- 31 3 6810 22 Jan 05 14:45 LAG1 22 0 24 -23 +- 39 3 +- 20 1 6810 22 Jan 05 18:27 LAG1 16 0 12 -12 +- 45 -1 +- 43 3 6810 23 Jan 05 17:01 LAG1 21 0 14 -5 +- 40 -7 +- 26 6 6810 24 Jan 05 15:53 LAG1 5 0 13 -8 +- 92 -10 +- 135 2 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 20 Jan 05 21:52 LAG1 2 0 2 33 +- 755 -21 +- 502 0 7080 21 Jan 05 23:53 LAG1 10 0 12 3 +- 46 5 +- 27 2 7080 25 Jan 05 11:43 LAG1 7 0 7 6 +- 26 6 +- 38 2 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 19 Jan 05 10:55 LAG1 2 0 4 38 +- 645 32 +- 502 0 7090 19 Jan 05 11:02 LAG2 11 0 8 -1 +- 12 -8 +- 15 4 7090 19 Jan 05 14:13 LAG1 9 0 13 9 +- 20 -4 +- 23 1 7090 19 Jan 05 15:10 LAG2 22 0 8 3 +- 9 4 +- 5 4 7090 19 Jan 05 17:33 LAG1 12 0 10 -11 +- 12 2 +- 13 1 7090 19 Jan 05 19:21 LAG2 23 0 9 1 +- 8 -6 +- 5 2 7090 19 Jan 05 20:45 LAG1 12 0 14 -7 +- 26 3 +- 13 1 7090 20 Jan 05 12:53 LAG1 10 0 7 3 +- 22 -3 +- 18 0 7090 20 Jan 05 13:13 LAG2 15 0 5 1 +- 11 -3 +- 8 2 7090 20 Jan 05 16:21 LAG1 9 0 3 -2 +- 17 -1 +- 23 1 7090 20 Jan 05 17:39 LAG2 5 0 2 2 +- 48 1 +- 54 1 7090 20 Jan 05 19:29 LAG1 21 0 16 -3 +- 9 9 +- 5 2 7090 21 Jan 05 11:21 LAG2 14 0 2 0 +- 11 0 +- 12 2 7090 21 Jan 05 11:51 LAG1 10 0 9 -16 +- 28 6 +- 17 3 7090 21 Jan 05 15:17 LAG1 3 0 8 -4 +- 160 -4 +- 154 1 7090 21 Jan 05 15:25 LAG2 26 0 6 -1 +- 8 3 +- 5 2 7090 21 Jan 05 18:13 LAG1 17 0 3 0 +- 10 -1 +- 7 2 7090 21 Jan 05 19:53 LAG2 12 0 8 12 +- 22 -10 +- 15 1 7090 21 Jan 05 21:37 LAG1 13 0 5 -2 +- 11 1 +- 5 4 7090 22 Jan 05 09:38 LAG2 6 0 8 22 +- 67 -14 +- 41 5 7090 22 Jan 05 10:23 LAG1 9 0 18 -16 +- 15 -3 +- 13 2 7090 22 Jan 05 13:29 LAG2 11 0 4 0 +- 15 -1 +- 12 4 7090 22 Jan 05 13:45 LAG1 11 0 8 -2 +- 12 -9 +- 15 2 7090 22 Jan 05 17:17 LAG1 4 0 8 -6 +- 119 0 +- 90 3 7090 22 Jan 05 20:45 LAG1 4 0 6 -9 +- 265 6 +- 114 1 7090 23 Jan 05 07:35 LAG2 12 0 9 -7 +- 18 8 +- 15 6 7090 23 Jan 05 09:01 LAG1 8 0 15 -19 +- 18 4 +- 10 4 7090 23 Jan 05 11:27 LAG2 23 0 9 2 +- 8 -3 +- 7 8 7090 23 Jan 05 12:23 LAG1 19 0 13 3 +- 10 7 +- 6 2 7090 23 Jan 05 15:39 LAG2 22 0 13 0 +- 8 9 +- 5 1 7090 23 Jan 05 18:53 LAG1 15 0 14 6 +- 11 5 +- 5 3 7090 23 Jan 05 19:55 LAG2 2 0 14 18 +- 78 5 +- 79 0 7090 24 Jan 05 11:23 LAG1 6 0 18 -3 +- 78 -8 +- 43 1 7090 24 Jan 05 13:43 LAG2 22 0 1 0 +- 9 -1 +- 7 0 7090 24 Jan 05 14:33 LAG1 7 0 7 -1 +- 16 -13 +- 34 2 7090 24 Jan 05 17:45 LAG1 13 0 11 10 +- 12 -9 +- 11 1 7090 24 Jan 05 18:09 LAG2 18 0 5 3 +- 14 -4 +- 8 2 7090 24 Jan 05 21:09 LAG1 9 0 12 -1 +- 16 -6 +- 8 1 7090 25 Jan 05 09:49 LAG1 5 0 10 -9 +- 21 3 +- 29 2 7090 25 Jan 05 11:49 LAG2 21 0 16 0 +- 10 -12 +- 9 8 7090 25 Jan 05 13:15 LAG1 13 0 9 -6 +- 14 -2 +- 12 3 7090 25 Jan 05 15:57 LAG2 17 0 15 -1 +- 13 9 +- 9 1 7090 25 Jan 05 16:39 LAG1 6 0 5 -2 +- 42 -1 +- 46 3 7090 25 Jan 05 19:39 LAG1 18 0 19 -6 +- 10 9 +- 6 2 7090 25 Jan 05 20:15 LAG2 11 0 15 19 +- 16 -14 +- 21 2 7090 26 Jan 05 08:37 LAG1 7 0 20 -16 +- 49 -2 +- 35 7 7090 26 Jan 05 10:01 LAG2 5 0 9 14 +- 30 -19 +- 63 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 19 Jan 05 00:28 LAG1 2 0 5 11 +- 95 -61 +- 399 0 7105 24 Jan 05 07:25 LAG2 10 0 8 10 +- 30 2 +- 21 2 7105 24 Jan 05 09:25 LAG1 2 0 24 24 +- 93 0 +- 268 0 7105 24 Jan 05 11:31 LAG2 5 0 11 -17 +- 57 -4 +- 41 2 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 19 Jan 05 12:53 LAG2 2 0 6 0 +- 74 14 +- 189 0 7110 19 Jan 05 23:18 LAG1 6 0 10 3 +- 108 -4 +- 49 8 7110 22 Jan 05 11:08 LAG2 10 0 6 3 +- 13 -7 +- 16 0 7110 22 Jan 05 15:13 LAG2 2 0 23 406 +- 684 407 +- 713 0 7110 22 Jan 05 15:51 LAG1 4 0 13 -11 +- 32 4 +- 60 3 7110 23 Jan 05 13:29 LAG2 8 0 3 -4 +- 51 1 +- 32 1 7110 23 Jan 05 14:19 LAG1 13 0 7 0 +- 14 4 +- 9 3 7110 23 Jan 05 17:31 LAG2 7 0 2 0 +- 19 0 +- 38 2 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 24 Jan 05 10:35 LAG2 3 0 15 23 +- 300 4 +- 174 1 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 20 Jan 05 18:35 LAG2 5 0 15 31 +- 156 -39 +- 208 7 7237 26 Jan 05 19:13 LAG2 3 0 192 -95 +- 202 559 +- 414 0 7237 26 Jan 05 21:18 LAG1 13 0 589 -76 +- 43 459 +- 33 10*CHK* Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 19 Jan 05 20:03 LAG2 12 0 7 -3 +- 58 1 +- 49 6 7249 19 Jan 05 20:25 LAG1 10 0 8 4 +- 63 0 +- 67 6 7249 20 Jan 05 22:09 LAG2 7 0 12 -21 +- 161 -17 +- 105 7 7249 20 Jan 05 22:29 LAG1 3 0 16 -152 +- 943 -86 +- 525 7 Station 7405 (Concepcion) (position solved, acc. 20 mm) 7405 19 Jan 05 06:19 LAG1 4 0 15 17 +- 83 2 +- 111 1 7405 20 Jan 05 01:39 LAG1 4 0 17 15 +- 74 -1 +- 71 2 7405 20 Jan 05 06:27 LAG2 5 0 8 -5 +- 88 2 +- 79 2 7405 20 Jan 05 08:41 LAG1 2 0 6 -76 +-1147 50 +- 695 0 7405 23 Jan 05 04:25 LAG1 7 0 26 19 +- 44 -9 +- 50 2 7405 23 Jan 05 04:45 LAG2 5 0 8 -5 +- 111 2 +- 90 2 7405 23 Jan 05 07:59 LAG1 7 0 15 13 +- 47 0 +- 31 2 7405 23 Jan 05 22:53 LAG2 10 0 11 -3 +- 86 -4 +- 47 2 7405 23 Jan 05 23:41 LAG1 10 0 15 9 +- 31 15 +- 23 1 7405 25 Jan 05 01:55 LAG1 2 0 11 -40 +- 345 -33 +- 381 0 7405 26 Jan 05 00:31 LAG1 7 0 6 -4 +- 35 0 +- 31 2 7405 26 Jan 05 03:55 LAG1 3 0 19 5 +- 77 -15 +- 86 0 7405 26 Jan 05 07:23 LAG1 7 0 5 7 +- 40 -2 +- 36 1 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 25 Jan 05 15:29 LAG2 8 0 13 -17 +- 47 21 +- 35 4 7501 25 Jan 05 19:35 LAG2 15 0 17 5 +- 11 14 +- 11 3 7501 26 Jan 05 03:31 LAG1 4 0 11 33 +- 170 -12 +- 91 1 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 19 Jan 05 15:17 LAG1 12 0 7 -7 +- 98 0 +- 51 3 7810 22 Jan 05 11:36 LAG1 7 0 5 -3 +- 84 2 +- 56 3 7810 22 Jan 05 12:01 LAG2 20 0 24 -6 +- 48 -13 +- 32 3 7810 22 Jan 05 14:43 LAG1 22 0 20 -16 +- 39 5 +- 20 3 7810 22 Jan 05 18:31 LAG1 14 0 6 -4 +- 48 0 +- 51 4 7810 23 Jan 05 17:01 LAG1 22 0 12 0 +- 39 -7 +- 25 5 7810 24 Jan 05 15:53 LAG1 6 0 5 3 +- 85 -8 +- 128 2 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 21 Jan 05 16:17 LAG1 16 0 19 18 +- 45 0 +- 36 7 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 20 Jan 05 03:35 LAG2 3 0 51 59 +- 180 17 +- 354 0 7824 20 Jan 05 03:53 LAG1 4 0 23 27 +- 247 4 +- 295 0 7824 21 Jan 05 19:49 LAG1 8 0 49 49 +- 72 1 +- 89 1 7824 22 Jan 05 03:43 LAG2 7 0 61 70 +- 74 14 +- 92 2 7824 22 Jan 05 04:31 LAG1 8 0 57 76 +- 92 13 +- 53 7 7824 22 Jan 05 18:23 LAG1 6 0 55 60 +- 86 4 +- 67 2 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 19 Jan 05 10:37 LAG1 17 0 3 2 +- 10 -2 +- 7 2 7825 19 Jan 05 11:11 LAG2 24 0 5 4 +- 8 0 +- 5 3 7825 19 Jan 05 13:59 LAG1 12 0 9 -1 +- 12 -9 +- 13 2 7825 19 Jan 05 15:31 LAG2 21 0 10 -1 +- 9 6 +- 5 2 7825 19 Jan 05 17:11 LAG1 13 0 15 -18 +- 17 -13 +- 10 4 7825 19 Jan 05 20:59 LAG1 10 0 3 4 +- 15 -2 +- 20 1 7825 20 Jan 05 13:53 LAG2 14 0 2 3 +- 22 -1 +- 13 1 7825 20 Jan 05 15:53 LAG1 20 0 12 -4 +- 9 -6 +- 5 3 7825 20 Jan 05 17:45 LAG2 11 0 6 4 +- 12 3 +- 17 1 7825 20 Jan 05 19:21 LAG1 13 0 6 -4 +- 17 0 +- 11 4 7825 21 Jan 05 07:13 LAG2 15 0 15 24 +- 22 8 +- 13 5 7825 21 Jan 05 08:11 LAG1 12 0 10 -18 +- 34 11 +- 16 3 7825 21 Jan 05 11:19 LAG1 14 0 11 -6 +- 11 -9 +- 10 3 7825 21 Jan 05 11:45 LAG2 15 0 3 1 +- 13 0 +- 9 3 7825 22 Jan 05 05:23 LAG2 6 1 11 40 +- 178 27 +- 97 3 7825 22 Jan 05 06:31 LAG1 15 0 11 -5 +- 10 -5 +- 9 7 7825 23 Jan 05 11:42 LAG2 2 0 9 286 +-2023 128 +- 933 0 7825 24 Jan 05 05:33 LAG2 15 0 10 9 +- 13 4 +- 9 7 7825 24 Jan 05 07:29 LAG1 12 0 6 -5 +- 20 4 +- 10 1 7825 24 Jan 05 09:41 LAG2 27 0 19 15 +- 8 -4 +- 5 6 7825 24 Jan 05 10:47 LAG1 15 0 9 -1 +- 10 -6 +- 8 5 7825 24 Jan 05 14:08 LAG2 1 0 16 0 +- 0 0 +- 0 0 7825 24 Jan 05 17:31 LAG1 10 0 19 -2 +- 13 -10 +- 9 12 7825 24 Jan 05 18:16 LAG2 7 0 11 4 +- 22 14 +- 44 2 7825 25 Jan 05 08:11 LAG2 13 0 5 9 +- 29 -7 +- 18 3 7825 25 Jan 05 09:21 LAG1 22 0 6 3 +- 8 2 +- 4 2 7825 25 Jan 05 12:01 LAG2 21 0 5 0 +- 9 0 +- 6 5 7825 25 Jan 05 12:53 LAG1 7 0 7 7 +- 15 1 +- 14 3 7825 25 Jan 05 16:05 LAG1 14 0 13 -11 +- 11 4 +- 6 2 7825 25 Jan 05 16:13 LAG2 13 0 19 -19 +- 11 0 +- 7 3 7825 25 Jan 05 19:44 LAG1 12 1 18 -19 +- 17 5 +- 10 10 7825 26 Jan 05 06:05 LAG2 11 0 5 0 +- 13 1 +- 15 4 7825 26 Jan 05 08:07 LAG1 21 0 17 -11 +- 9 -3 +- 5 7 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 19 Jan 05 05:59 LAG2 7 0 21 -27 +- 56 10 +- 77 3 7832 19 Jan 05 10:03 LAG2 8 0 9 5 +- 24 9 +- 26 2 7832 19 Jan 05 11:43 LAG1 6 0 18 15 +- 30 -5 +- 41 6 7832 23 Jan 05 11:01 LAG2 4 0 2 36 +- 623 -17 +- 291 1 7832 23 Jan 05 13:17 LAG1 13 0 16 -6 +- 21 11 +- 12 3 Station 7835 (Grasse) (position fixed, acc. 30 mm) 7835 20 Jan 05 17:45 LAG1 11 0 4 -1 +- 30 -4 +- 34 1 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 19 Jan 05 02:24 LAG2 13 0 19 19 +- 26 -3 +- 30 3 7838 19 Jan 05 19:58 LAG2 14 0 33 45 +- 46 8 +- 27 3 7838 19 Jan 05 20:29 LAG1 12 0 27 42 +- 55 -10 +- 30 2 7838 20 Jan 05 04:27 LAG2 10 0 23 32 +- 42 17 +- 32 4 7838 20 Jan 05 06:19 LAG1 22 0 35 34 +- 20 1 +- 10 5 7838 20 Jan 05 10:01 LAG1 15 0 14 -12 +- 25 0 +- 28 7 7838 20 Jan 05 18:07 LAG2 20 0 45 46 +- 22 6 +- 15 6 7838 20 Jan 05 18:51 LAG1 18 0 32 32 +- 22 0 +- 17 4 7838 21 Jan 05 05:03 LAG1 16 0 25 25 +- 24 3 +- 17 3 7838 21 Jan 05 08:29 LAG1 21 0 22 13 +- 20 11 +- 13 3 7838 22 Jan 05 07:03 LAG1 22 0 19 18 +- 20 1 +- 10 7 7838 23 Jan 05 16:45 LAG2 8 0 44 30 +- 45 20 +- 50 5 7838 23 Jan 05 18:27 LAG1 8 0 24 25 +- 37 -7 +- 63 5 7838 24 Jan 05 18:35 LAG2 24 0 37 36 +- 19 -2 +- 11 9 7838 25 Jan 05 03:06 LAG2 14 0 31 31 +- 25 0 +- 25 3 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 19 Jan 05 15:23 LAG1 19 0 9 -8 +- 9 -1 +- 5 0 7839 19 Jan 05 19:13 LAG1 7 0 10 11 +- 20 2 +- 54 1 7839 20 Jan 05 03:25 LAG2 18 0 10 -8 +- 10 3 +- 4 4 7839 20 Jan 05 03:33 LAG1 10 0 8 -4 +- 15 3 +- 13 1 7839 21 Jan 05 13:50 LAG2 10 0 6 5 +- 14 0 +- 13 1 7839 22 Jan 05 00:05 LAG2 9 0 13 -10 +- 15 -5 +- 21 4 7839 22 Jan 05 18:29 LAG1 14 0 15 1 +- 11 -15 +- 12 3 7839 23 Jan 05 17:05 LAG1 18 0 12 4 +- 10 -9 +- 7 3 7839 24 Jan 05 00:13 LAG2 6 0 15 0 +- 40 -21 +- 59 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 19 Jan 05 04:57 LAG1 16 0 7 1 +- 17 4 +- 9 3 7840 19 Jan 05 05:19 LAG2 15 0 3 2 +- 17 0 +- 9 2 7840 19 Jan 05 08:37 LAG1 17 0 10 9 +- 16 1 +- 10 3 7840 19 Jan 05 09:23 LAG2 12 0 6 -1 +- 41 2 +- 26 2 7840 22 Jan 05 04:23 LAG1 19 0 18 15 +- 15 -3 +- 10 6 7840 22 Jan 05 07:43 LAG2 10 0 8 -1 +- 34 5 +- 25 2 7840 22 Jan 05 08:06 LAG1 11 0 6 6 +- 19 1 +- 17 1 7840 22 Jan 05 11:39 LAG1 5 0 16 17 +- 31 7 +- 64 2 7840 23 Jan 05 06:03 LAG2 11 0 19 -7 +- 25 15 +- 17 1 7840 23 Jan 05 06:35 LAG1 20 0 5 -4 +- 14 0 +- 8 3 7840 23 Jan 05 09:57 LAG2 8 0 9 0 +- 23 4 +- 13 2 7840 23 Jan 05 10:09 LAG1 13 0 7 2 +- 18 4 +- 11 1 7840 23 Jan 05 13:47 LAG1 6 0 10 -9 +- 32 10 +- 29 3 7840 23 Jan 05 17:05 LAG1 17 0 7 3 +- 16 -3 +- 10 3 7840 24 Jan 05 08:23 LAG2 9 0 5 -1 +- 77 -1 +- 45 3 7840 24 Jan 05 08:59 LAG1 13 0 10 -7 +- 24 -2 +- 16 3 7840 24 Jan 05 15:43 LAG1 4 0 24 47 +- 329 10 +- 155 3 7840 25 Jan 05 14:35 LAG1 7 0 14 13 +- 33 1 +- 36 2 7840 26 Jan 05 08:42 LAG2 2 0 31 46 +- 694 -50 +- 449 0 7840 26 Jan 05 09:49 LAG1 3 0 8 7 +- 38 -16 +- 143 0 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 20 Jan 05 17:35 LAG1 7 0 4 -2 +- 17 -1 +- 12 2 7941 21 Jan 05 12:49 LAG1 2 0 6 23 +- 211 23 +- 282 0 7941 21 Jan 05 13:52 LAG2 5 0 2 9 +- 109 5 +- 78 1 7941 21 Jan 05 16:17 LAG1 10 0 7 3 +- 16 -2 +- 8 5 7941 23 Jan 05 07:03 LAG1 7 0 7 -4 +- 79 -1 +- 37 1 7941 23 Jan 05 10:29 LAG2 3 0 26 58 +- 159 -32 +- 159 2 7941 23 Jan 05 13:23 LAG1 6 0 18 24 +- 103 20 +- 49 1 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 23 Jan 05 17:25 LAG1 6 0 16 -20 +- 60 3 +- 45 4 -------------------------------------------------------------------------------- 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 - 050123 0/ 17/ 0 0/ 20/ 0 37 1831 LVIL 040815 - 050118 0/ 23/ 0 0/ 25/ 0 48 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 - 050126 8/ 7/ 0 4/ 10/ 1 30 6810 ZIMLAT 040805 - 050127 168/103/ 18 95/ 96/ 18 498 7080 MLRS25 040701 - 050125 42/ 52/ 2 45/ 63/ 4 208 7090 ML0514 040716 - 050126 111/296/ 26 102/194/ 24 753 7105 ML0725 040701 - 050124 0/ 72/ 4 2/ 78/ 7 163 7110 ML0414 040701 - 050123 65/112/ 14 66/110/ 17 384 7124 ML0819 040705 - 050124 0/ 31/ 0 0/ 13/ 0 44 7231 WUHA01 040701 - 041208 0/ 8/ 0 0/ 20/ 0 28 7237 CHALAS 040702 - 050126 0/130/ 0 0/138/ 1 269 7249 BEJLAS 040701 - 050120 0/ 84/ 0 0/ 95/ 0 179 7308 CRLLAS 041201 - 050111 2/ 7/ 1 2/ 6/ 0 18 7355 TROS02 040702 - 040829 0/ 37/ 0 0/ 29/ 0 66 7405 TIGO 040710 - 050126 3/ 20/ 0 2/ 8/ 0 33 7501 ML0616 040701 - 050126 16/ 21/ 2 56/ 62/ 6 163 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 - 050127 222/129/ 24 120/116/ 21 632 7811 POLLAS 040706 - 050121 0/ 50/ 0 0/ 59/ 0 109 7824 SPNLAS 040701 - 050122 0/ 86/ 0 0/ 79/ 0 165 7825 STL3 040807 - 050126 102/142/ 26 104/104/ 20 498 7832 SALRO 040702 - 050123 119/190/ 15 160/218/ 23 725 7835 GRASSE 040702 - 050127 0/ 41/ 1 0/ 28/ 1 71 7836 GFZLAS 040701 - 040701 0/ 1/ 0 0/ 0/ 0 1 7837 CHILAS 040704 - 050111 0/ 85/ 0 0/114/ 1 200 7838 SHOLAS 040701 - 050125 45/112/ 3 74/124/ 7 365 7839 AUSLAS 040701 - 050124 148/152/ 28 76/135/ 21 560 7840 RGOLAS 040701 - 050126 105/ 91/ 23 69/ 75/ 12 375 7841 GFZLA3 040702 - 050117 28/ 56/ 13 19/ 57/ 7 180 7845 GRASLL 040705 - 040920 11/ 14/ 0 3/ 12/ 1 41 7941 MLROnn 040701 - 050123 80/ 57/ 9 70/ 45/ 5 266 8834 WLRS01 040701 - 050127 182/120/ 21 104/124/ 16 567 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050120.0 121.6 +/- 0.1 215.1 +/- 0.1 -32573.47 +/- 0.02 050121.0 119.0 +/- 0.1 214.4 +/- 0.1 -32573.78 +/- 0.02 050122.0 117.0 +/- 0.1 213.4 +/- 0.1 -32573.93 +/- 0.03 050123.0 115.1 +/- 0.1 212.4 +/- 0.1 -32574.00 +/- 0.04 050124.0 111.3 +/- 0.1 212.0 +/- 0.1 -32574.20 +/- 0.05 050125.0 109.4 +/- 0.2 211.4 +/- 0.2 -32574.39 +/- 0.05 050126.0 108.4 +/- 0.1 209.2 +/- 0.1 -32574.57 +/- 0.06 -------------------------------------------------------------- D. COMMENTS 1. The analysis covered in this report is based on a new set of station coordinates: instead of the solution SSC(DUT)93L05, which was extrapolated over some 10 years beyond the epoch of the latest observations, the current analysis relies on the ITRF2000 solution. Tests performed during the last year show that the rms-of-fit that can be obtained when using ITRF2000 can be reduced to about 2 cm (instead of the 3+ cm which was achieved with the old model, for present-day epochs). Other model modifications are to be expected. We hope to serve the community with this development. 2. As of July 1, 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 ******************************************************************************** |