| Date: | 2005-11-07 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6299: Delft QL Report November 07, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-11-07 13:15:00 UTC Message No. 6299 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report November 07, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS November 7, 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 Mon, Nov 7, 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 Mon, Nov 7, 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) 051105 - 051105 3 2 6810 Zimmerwald 846, Switzerland 051105 - 051107 8 6 7080 McDonald Obs., Fort Davis, TX 051106 - 051106 2 2 7090 Yarragadee, Australia 051105 - 051106 3 3 7110 Monument Peak, California 051105 - 051105 1 1 7237 Changchun, China 051106 - 051106 2 2 7249 Beijing, China 051105 - 051106 6 4 7405 Concepcion, Chile (TIGO 424) 051105 - 051105 1 - 7810 Zimmerwald 423, Switzerland 051105 - 051107 8 6 7824 San Fernando, Spain 051105 - 051107 4 4 7825 Mount Stromlo, Australia 051105 - 051106 2 3 7841 Potsdam, Germany 051105 - 051105 1 - 7941 Matera, Italy (MLRO 532) 051105 - 051105 1 1 ------ ------ --- --- TOTAL 051105 - 051107 42 34 ------------------------------------------------------------------------------ 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 Sun, Oct 30, 2005 to Mon, Nov 7, 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 203/201 167/166 Number of Normal Points 2081/2051 1729/1720 Weighted RMS of Fit (mm) 16 15 ----------------------------------------------------------------------- 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 30 Oct 05 21:09 LAG1 5 0 40 -30 +- 301 -46 +- 591 27 1824 30 Oct 05 22:07 LAG2 3 0 34 -547 +-6059 286 +-3095 6 1824 2 Nov 05 01:37 LAG1 3 0 88 -808 +-3584 456 +-1947 21 Station 1831 (Lviv) (position fixed, acc. 400 mm) 1831 30 Oct 05 21:06 LAG1 5 0 117 -197 +-1178 -98 +-1157 11 1831 31 Oct 05 16:29 LAG1 5 0 139 115 +-1366 17 +- 950 7 1831 31 Oct 05 19:49 LAG1 5 0 124 -156 +- 900 -53 +-1083 11 1831 31 Oct 05 23:11 LAG1 8 0 88 -63 +- 576 -113 +- 554 9 1831 1 Nov 05 02:49 LAG1 6 0 80 0 +- 532 -125 +- 846 13 1831 1 Nov 05 03:47 LAG2 8 0 92 -65 +-1254 17 +- 807 13 1831 1 Nov 05 18:23 LAG1 10 0 146 -150 +- 408 -6 +- 283 6 1831 1 Nov 05 21:49 LAG1 4 0 93 -219 +-3701 -78 +-2202 20 1831 1 Nov 05 22:06 LAG2 10 0 30 -17 +- 976 27 +- 607 8 1831 2 Nov 05 01:19 LAG1 10 0 109 -44 +- 402 -104 +- 367 13 1831 2 Nov 05 01:57 LAG2 10 0 99 -40 +- 410 91 +- 356 23 1831 2 Nov 05 17:23 LAG1 4 0 69 -112 +-4203 89 +-2182 29 1831 2 Nov 05 20:33 LAG1 3 0 103 -276 +-2408 -160 +-1942 4 1831 3 Nov 05 00:01 LAG1 4 0 90 -77 +-1625 -161 +-1666 4 1831 3 Nov 05 00:13 LAG2 8 0 52 -45 +- 733 73 +- 694 21 1831 3 Nov 05 03:35 LAG1 6 0 94 -18 +- 562 -163 +- 910 13 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 31 Oct 05 15:50 LAG2 4 0 18 35 +-2450 12 +-1697 5 1864 31 Oct 05 16:05 LAG1 10 0 33 -24 +- 192 -6 +- 136 22 1864 31 Oct 05 19:33 LAG1 6 0 55 -52 +- 248 1 +- 381 19 1864 31 Oct 05 20:07 LAG2 9 0 34 -21 +- 319 -6 +- 258 20 1864 1 Nov 05 22:06 LAG2 10 0 30 -25 +- 189 8 +- 156 11 1864 2 Nov 05 16:05 LAG2 4 0 13 0 +-2368 7 +-1656 6 1864 2 Nov 05 17:01 LAG1 3 0 69 -65 +- 649 11 +-1683 5 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 30 Oct 05 17:31 LAG1 18 0 42 -41 +- 72 6 +- 42 11 1884 30 Oct 05 21:01 LAG1 12 0 52 -51 +- 87 7 +- 46 10 1884 30 Oct 05 21:52 LAG2 10 0 69 -68 +- 169 0 +- 132 12 1884 31 Oct 05 01:43 LAG2 15 0 44 -45 +- 79 8 +- 63 6 1884 31 Oct 05 04:11 LAG1 8 0 42 -45 +- 135 -7 +- 171 4 1884 31 Oct 05 16:03 LAG1 20 0 13 -8 +- 67 -3 +- 40 8 1884 31 Oct 05 19:37 LAG1 15 0 63 -61 +- 85 2 +- 54 5 1884 31 Oct 05 23:43 LAG2 20 0 52 -45 +- 67 -14 +- 44 8 1884 1 Nov 05 02:37 LAG1 18 0 52 -45 +- 71 -18 +- 43 9 1884 1 Nov 05 03:45 LAG2 16 0 51 -48 +- 76 -5 +- 56 11 1884 1 Nov 05 18:15 LAG1 14 0 36 -32 +- 80 8 +- 37 10 1884 1 Nov 05 21:47 LAG1 9 0 52 -55 +- 197 -3 +- 128 9 1884 1 Nov 05 22:06 LAG2 10 0 14 -25 +- 182 13 +- 132 3 1884 2 Nov 05 01:23 LAG1 14 0 16 16 +- 84 -3 +- 59 5 1884 2 Nov 05 01:51 LAG2 17 0 16 -5 +- 73 9 +- 54 6 1884 3 Nov 05 15:39 LAG1 11 0 13 10 +- 92 -6 +- 90 7 1884 3 Nov 05 19:17 LAG1 9 0 20 -13 +- 119 20 +- 107 5 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 31 Oct 05 20:48 LAG1 6 0 22 3 +- 34 -10 +- 14 2 6405 1 Nov 05 16:31 LAG2 12 0 9 -26 +- 91 16 +- 45 3 6405 1 Nov 05 19:43 LAG1 14 0 20 -6 +- 30 13 +- 16 6 6405 1 Nov 05 23:04 LAG1 18 0 17 12 +- 16 7 +- 13 3 6405 2 Nov 05 00:17 LAG2 27 0 26 -3 +- 12 16 +- 8 2 6405 2 Nov 05 14:43 LAG2 5 0 10 -14 +- 432 10 +- 200 8 6405 2 Nov 05 15:16 LAG1 1 0 24 0 +- 0 0 +- 0 0 6405 3 Nov 05 20:13 LAG1 14 0 4 -1 +- 23 2 +- 14 1 6405 3 Nov 05 20:51 LAG2 15 0 10 -18 +- 32 12 +- 21 2 6405 4 Nov 05 00:03 LAG1 3 0 25 33 +- 95 24 +- 251 1 6405 4 Nov 05 00:47 LAG2 10 0 10 -3 +- 20 13 +- 32 1 6405 4 Nov 05 12:47 LAG1 3 0 18 -77 +- 996 38 +- 400 1 6405 4 Nov 05 14:23 LAG2 8 0 23 22 +- 23 4 +- 12 2 6405 4 Nov 05 15:53 LAG1 5 0 14 14 +- 69 0 +- 89 3 6405 4 Nov 05 18:31 LAG2 11 0 18 -17 +- 20 -11 +- 20 4 6405 4 Nov 05 19:11 LAG1 10 0 12 -5 +- 36 -5 +- 25 2 6405 4 Nov 05 22:36 LAG1 10 0 9 7 +- 21 -8 +- 25 1 6405 4 Nov 05 23:01 LAG2 15 0 18 -5 +- 29 -8 +- 19 2 6405 5 Nov 05 11:08 LAG1 7 0 22 17 +- 48 -4 +- 35 18 6405 5 Nov 05 12:35 LAG2 4 0 16 -3 +- 173 10 +- 137 1 6405 5 Nov 05 14:43 LAG1 5 0 16 53 +- 173 -27 +- 108 10 6405 5 Nov 05 16:56 LAG2 10 0 6 3 +- 72 1 +- 45 3 6405 5 Nov 05 17:41 LAG1 10 0 15 11 +- 24 -6 +- 25 2 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 30 Oct 05 00:02 LAG2 1 0 2 0 +- 0 0 +- 0 0 6810 30 Oct 05 01:43 LAG1 19 0 34 -34 +- 46 0 +- 21 3 6810 30 Oct 05 03:18 LAG2 21 0 20 -14 +- 40 6 +- 20 2 6810 30 Oct 05 05:17 LAG1 25 0 13 -12 +- 36 -1 +- 21 2 6810 30 Oct 05 07:23 LAG2 23 0 20 -11 +- 38 10 +- 25 2 6810 30 Oct 05 17:26 LAG1 23 0 11 -5 +- 38 4 +- 18 2 6810 30 Oct 05 21:01 LAG1 12 0 35 -25 +- 60 8 +- 35 3 6810 30 Oct 05 21:15 LAG2 19 0 27 -18 +- 42 8 +- 24 4 6810 31 Oct 05 00:27 LAG1 16 0 14 -13 +- 47 2 +- 24 5 6810 31 Oct 05 01:28 LAG2 13 0 18 -8 +- 51 11 +- 33 2 6810 31 Oct 05 03:53 LAG1 18 0 17 -17 +- 44 1 +- 18 5 6810 31 Oct 05 05:27 LAG2 20 0 11 -11 +- 44 2 +- 23 3 6810 1 Nov 05 14:42 LAG1 7 0 29 27 +- 69 -5 +- 38 2 6810 1 Nov 05 18:15 LAG1 25 0 19 2 +- 37 9 +- 17 3 6810 1 Nov 05 21:38 LAG2 4 0 4 -3 +-1027 0 +- 529 3 6810 1 Nov 05 22:05 LAG1 10 0 12 -8 +- 78 10 +- 55 3 6810 2 Nov 05 01:11 LAG1 25 0 14 10 +- 36 3 +- 17 5 6810 2 Nov 05 01:35 LAG2 26 0 31 15 +- 35 14 +- 20 4 6810 3 Nov 05 00:01 LAG1 5 0 20 -9 +- 94 -14 +- 63 8 6810 3 Nov 05 00:09 LAG2 5 0 5 -7 +- 244 1 +- 237 1 6810 3 Nov 05 08:03 LAG2 13 0 23 6 +- 70 15 +- 59 2 6810 3 Nov 05 15:29 LAG1 15 0 8 -2 +- 51 -3 +- 29 6 6810 3 Nov 05 18:13 LAG2 4 0 7 -8 +- 130 -8 +- 527 2 6810 3 Nov 05 19:11 LAG1 14 0 21 -6 +- 49 13 +- 31 4 6810 3 Nov 05 22:05 LAG2 13 0 9 2 +- 67 4 +- 44 3 6810 3 Nov 05 22:37 LAG1 16 0 37 -31 +- 45 12 +- 28 3 6810 4 Nov 05 01:57 LAG2 4 0 35 -8 +- 93 17 +- 49 2 6810 4 Nov 05 02:07 LAG1 4 0 16 -1 +- 368 7 +- 204 6 6810 5 Nov 05 19:59 LAG1 14 0 27 -20 +- 48 10 +- 27 3 6810 5 Nov 05 21:59 LAG2 18 0 5 -5 +- 47 0 +- 30 2 6810 5 Nov 05 23:22 LAG1 13 0 36 -36 +- 50 2 +- 33 2 6810 6 Nov 05 02:24 LAG2 3 0 18 -10 +- 106 9 +- 67 8 6810 6 Nov 05 03:00 LAG1 13 0 18 -7 +- 65 -7 +- 39 5 6810 6 Nov 05 06:13 LAG2 15 0 20 0 +- 47 11 +- 26 2 6810 6 Nov 05 06:55 LAG1 5 0 25 -6 +- 403 -18 +- 414 1 6810 6 Nov 05 15:03 LAG1 20 0 7 5 +- 41 0 +- 30 4 6810 6 Nov 05 18:29 LAG1 14 0 9 -6 +- 57 1 +- 31 3 6810 6 Nov 05 20:02 LAG2 19 0 25 -21 +- 42 6 +- 27 4 6810 6 Nov 05 22:03 LAG1 15 0 9 -7 +- 47 -1 +- 28 5 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 30 Oct 05 02:50 LAG2 6 0 4 3 +- 27 4 +- 74 1 7080 30 Oct 05 03:03 LAG1 5 0 7 -48 +- 226 21 +- 109 2 7080 30 Oct 05 07:07 LAG2 5 0 12 -79 +- 228 51 +- 140 5 7080 30 Oct 05 09:20 LAG1 12 0 11 -10 +- 19 -1 +- 17 2 7080 30 Oct 05 10:54 LAG2 10 0 19 11 +- 28 20 +- 24 5 7080 31 Oct 05 04:47 LAG2 8 0 5 -7 +- 45 -2 +- 41 1 7080 31 Oct 05 08:11 LAG1 1 0 18 0 +- 0 0 +- 0 0 7080 31 Oct 05 08:55 LAG2 5 0 4 -18 +- 208 -13 +- 149 3 7080 1 Nov 05 03:21 LAG2 6 0 50 10 +- 213 -31 +- 113 8 7080 1 Nov 05 03:53 LAG1 3 0 17 71 +- 815 -42 +- 397 6 7080 1 Nov 05 06:53 LAG2 15 0 18 -2 +- 17 -12 +- 13 4 7080 1 Nov 05 11:09 LAG2 21 0 10 -3 +- 15 6 +- 9 6 7080 3 Nov 05 15:35 LAG2 14 0 11 -3 +- 21 9 +- 16 4 7080 3 Nov 05 23:19 LAG1 13 0 11 4 +- 20 4 +- 10 2 7080 4 Nov 05 22:17 LAG1 7 0 7 22 +- 75 -15 +- 63 1 7080 6 Nov 05 03:54 LAG1 3 0 14 4 +- 139 13 +- 185 0 7080 6 Nov 05 05:29 LAG2 9 0 4 0 +- 24 -2 +- 17 2 7080 6 Nov 05 09:48 LAG2 4 0 6 -6 +- 41 -6 +- 42 2 7080 6 Nov 05 10:31 LAG1 8 0 11 -19 +- 43 10 +- 30 3 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 30 Oct 05 05:23 LAG2 3 0 19 23 +- 358 -26 +- 225 0 7090 30 Oct 05 07:19 LAG1 18 0 10 -6 +- 10 5 +- 6 1 7090 30 Oct 05 13:17 LAG2 20 0 5 -5 +- 9 0 +- 7 1 7090 30 Oct 05 19:49 LAG1 10 0 7 -6 +- 13 -1 +- 9 2 7090 30 Oct 05 23:47 LAG1 4 0 5 -22 +- 166 9 +- 87 1 7090 31 Oct 05 03:21 LAG2 3 0 4 -20 +- 432 15 +- 268 2 7090 31 Oct 05 07:18 LAG2 6 0 6 -1 +- 17 -6 +- 21 4 7090 31 Oct 05 09:25 LAG1 17 0 10 -10 +- 10 0 +- 5 2 7090 31 Oct 05 11:13 LAG2 27 0 6 -3 +- 8 3 +- 4 1 7090 1 Nov 05 10:07 LAG2 2 0 4 -103 +-1455 46 +- 684 0 7090 1 Nov 05 11:47 LAG1 5 0 27 -27 +- 26 0 +- 74 0 7090 1 Nov 05 13:23 LAG2 14 0 8 -9 +- 11 -1 +- 12 1 7090 1 Nov 05 20:31 LAG1 16 0 12 -11 +- 10 0 +- 5 2 7090 2 Nov 05 00:09 LAG1 12 0 11 4 +- 13 10 +- 12 3 7090 2 Nov 05 03:27 LAG2 7 0 4 4 +- 44 0 +- 38 1 7090 2 Nov 05 06:53 LAG1 13 0 20 -18 +- 14 17 +- 10 3 7090 2 Nov 05 07:32 LAG2 5 0 3 -5 +- 51 -9 +- 77 1 7090 2 Nov 05 10:33 LAG1 10 0 7 -10 +- 35 2 +- 22 2 7090 2 Nov 05 11:35 LAG2 22 0 5 0 +- 9 0 +- 5 5 7090 2 Nov 05 19:23 LAG1 6 0 15 -22 +- 26 -23 +- 52 2 7090 2 Nov 05 22:51 LAG1 14 0 15 -8 +- 11 -8 +- 7 1 7090 3 Nov 05 05:33 LAG2 12 0 11 11 +- 17 -14 +- 17 4 7090 3 Nov 05 08:51 LAG1 19 0 15 -14 +- 9 -1 +- 5 1 7090 3 Nov 05 09:49 LAG2 16 0 6 -3 +- 12 -2 +- 9 1 7090 3 Nov 05 13:52 LAG2 11 0 16 -17 +- 14 5 +- 19 1 7090 3 Nov 05 21:21 LAG1 11 0 27 -31 +- 32 -2 +- 17 3 7090 4 Nov 05 11:11 LAG1 8 0 8 -8 +- 14 1 +- 20 1 7090 4 Nov 05 11:41 LAG2 29 0 4 -1 +- 7 1 +- 4 3 7090 5 Nov 05 05:55 LAG2 10 0 9 7 +- 24 -15 +- 28 3 7090 5 Nov 05 06:15 LAG1 14 0 4 -2 +- 11 1 +- 9 3 7090 5 Nov 05 09:37 LAG1 16 0 11 -10 +- 11 -7 +- 8 2 7090 5 Nov 05 10:07 LAG2 15 0 13 -7 +- 15 -5 +- 10 1 7090 5 Nov 05 14:07 LAG2 6 0 9 -7 +- 17 16 +- 65 2 7090 5 Nov 05 18:53 LAG1 9 0 3 -2 +- 17 3 +- 30 2 7090 5 Nov 05 22:07 LAG1 17 0 25 -25 +- 10 -4 +- 5 9 7090 5 Nov 05 23:47 LAG2 5 0 23 -16 +- 19 -27 +- 61 10 7090 6 Nov 05 07:57 LAG2 16 0 7 -3 +- 10 -8 +- 11 1 7090 6 Nov 05 08:27 LAG1 17 0 16 -5 +- 14 10 +- 7 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 31 Oct 05 07:39 LAG1 6 0 4 39 +- 283 12 +- 102 1 7105 31 Oct 05 09:01 LAG2 6 0 5 -22 +- 73 -9 +- 35 0 7105 31 Oct 05 11:25 LAG1 17 0 6 3 +- 10 -4 +- 9 3 7105 31 Oct 05 13:23 LAG2 4 0 12 -11 +- 47 1 +- 82 2 7105 1 Nov 05 07:11 LAG2 17 0 20 -10 +- 10 -9 +- 6 3 7105 1 Nov 05 10:29 LAG1 5 0 16 15 +- 237 -13 +- 100 1 7105 1 Nov 05 11:35 LAG2 15 0 13 -21 +- 19 8 +- 11 5 7105 2 Nov 05 08:27 LAG1 5 0 11 -6 +- 24 -5 +- 8 2 7105 2 Nov 05 09:21 LAG2 10 0 14 -11 +- 13 2 +- 6 5 7105 3 Nov 05 07:23 LAG1 8 0 10 -11 +- 16 -7 +- 19 1 7105 3 Nov 05 07:51 LAG2 12 0 17 -13 +- 47 -2 +- 24 1 7105 3 Nov 05 10:43 LAG1 19 0 11 -9 +- 9 -3 +- 5 3 7105 3 Nov 05 11:35 LAG2 13 0 19 -13 +- 13 10 +- 6 7 7105 4 Nov 05 09:15 LAG1 3 0 10 -10 +-1669 0 +- 575 0 7105 4 Nov 05 09:33 LAG2 12 0 8 -11 +- 20 2 +- 8 4 7105 5 Nov 05 08:29 LAG1 6 0 31 -12 +- 90 -7 +- 36 0 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 31 Oct 05 01:13 LAG1 16 0 5 5 +- 12 2 +- 7 2 7110 31 Oct 05 17:11 LAG2 3 0 9 -6 +- 117 -21 +- 161 0 7110 1 Nov 05 00:07 LAG1 14 0 30 2 +- 16 -21 +- 10 3 7110 1 Nov 05 02:57 LAG2 5 0 23 -33 +- 50 -16 +- 80 1 7110 1 Nov 05 03:25 LAG1 17 0 13 -2 +- 10 -7 +- 5 1 7110 1 Nov 05 06:43 LAG2 11 0 18 -2 +- 13 -10 +- 7 3 7110 1 Nov 05 06:55 LAG1 8 0 4 0 +- 14 -4 +- 19 2 7110 1 Nov 05 15:13 LAG2 16 0 2 1 +- 11 -1 +- 7 1 7110 2 Nov 05 02:03 LAG1 8 0 10 -6 +- 57 1 +- 27 2 7110 2 Nov 05 04:53 LAG2 6 0 21 -19 +- 56 1 +- 41 2 7110 2 Nov 05 05:47 LAG1 4 0 4 -4 +- 49 13 +- 88 1 7110 2 Nov 05 12:23 LAG1 2 0 7 0 +- 322 -6 +- 249 0 7110 3 Nov 05 01:11 LAG1 7 0 88 -2 +- 112 -35 +- 47 3 7110 3 Nov 05 23:23 LAG1 15 0 9 -7 +- 10 -4 +- 10 2 7110 4 Nov 05 02:59 LAG1 10 0 13 0 +- 13 7 +- 7 1 7110 4 Nov 05 04:59 LAG2 15 0 16 -15 +- 12 1 +- 7 2 7110 4 Nov 05 06:27 LAG1 7 0 15 -16 +- 18 22 +- 31 3 7110 4 Nov 05 13:05 LAG1 4 0 5 -8 +- 44 -2 +- 30 0 7110 5 Nov 05 01:27 LAG1 10 0 28 0 +- 14 -12 +- 6 3 7110 5 Nov 05 03:09 LAG2 19 2 11 -9 +- 11 0 +- 8 8 7110 5 Nov 05 05:07 LAG1 8 0 7 6 +- 14 -5 +- 24 2 7110 5 Nov 05 07:13 LAG2 17 0 16 -9 +- 10 -13 +- 8 2 7110 5 Nov 05 08:39 LAG1 3 0 3 11 +- 268 -11 +- 206 2 7110 5 Nov 05 11:27 LAG2 4 0 12 -16 +- 545 -1 +- 251 3 7110 5 Nov 05 11:38 LAG1 9 0 12 1 +- 14 -6 +- 7 4 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 31 Oct 05 08:17 LAG2 8 0 2 0 +- 26 2 +- 39 1 7124 2 Nov 05 08:25 LAG2 7 0 8 0 +- 18 13 +- 42 6 Station 7130 (Greenbelt) (position fixed, acc. 10 mm) 7130 31 Oct 05 01:02 LAG1 20 0 14 13 +- 9 2 +- 5 3 7130 3 Nov 05 00:39 LAG1 8 0 33 29 +- 14 -18 +- 15 1 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 30 Oct 05 10:27 LAG1 3 0 56 83 +- 324 -26 +- 295 3 7237 1 Nov 05 18:43 LAG2 6 0 61 -61 +- 140 2 +- 142 16 7237 2 Nov 05 09:40 LAG1 8 0 16 12 +- 54 -6 +- 53 5 7237 2 Nov 05 12:30 LAG2 3 0 10 -7 +- 447 -12 +- 430 8 7237 2 Nov 05 16:31 LAG1 4 0 8 -8 +- 269 -2 +- 256 5 7237 2 Nov 05 16:47 LAG2 3 0 17 84 +- 458 -102 +- 592 6 7237 2 Nov 05 20:09 LAG1 3 0 54 50 +- 136 13 +- 316 2 7237 3 Nov 05 18:53 LAG1 2 0 15 -33 +- 914 36 +- 699 0 7237 6 Nov 05 11:12 LAG1 8 0 36 38 +- 62 5 +- 55 8 7237 6 Nov 05 13:01 LAG2 7 0 7 0 +- 57 -2 +- 106 7 7237 6 Nov 05 17:05 LAG2 7 0 19 15 +- 64 -11 +- 53 11 7237 6 Nov 05 18:09 LAG1 4 0 8 5 +- 94 -2 +- 201 5 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 31 Oct 05 16:25 LAG2 9 0 39 9 +- 121 -29 +- 91 24 7249 1 Nov 05 11:29 LAG1 1 0 9 0 +- 0 0 +- 0 0 7249 3 Nov 05 11:57 LAG1 12 0 13 4 +- 56 -9 +- 40 8 7249 4 Nov 05 10:36 LAG1 7 0 31 -18 +- 60 25 +- 75 22 7249 4 Nov 05 12:39 LAG2 6 0 31 21 +- 121 0 +- 162 22 7249 5 Nov 05 16:01 LAG1 14 0 18 14 +- 44 -5 +- 37 12 7249 5 Nov 05 18:47 LAG2 11 1 21 13 +- 61 -10 +- 59 18 7249 5 Nov 05 19:20 LAG1 16 0 27 -5 +- 39 14 +- 23 14 7249 6 Nov 05 11:25 LAG1 5 0 25 23 +- 69 24 +- 144 7 7249 6 Nov 05 12:47 LAG2 14 0 17 -2 +- 42 -13 +- 39 10 7249 6 Nov 05 14:41 LAG1 8 2 29 -26 +- 64 -6 +- 117 11 7249 6 Nov 05 17:03 LAG2 7 0 25 5 +- 91 15 +- 74 11 7249 6 Nov 05 18:01 LAG1 14 0 14 1 +- 40 1 +- 31 13 7249 6 Nov 05 20:58 LAG2 17 0 18 1 +- 38 4 +- 28 17 7249 6 Nov 05 21:40 LAG1 9 1 3244 -1620 +- 99 3011 +- 76 1778*CHK* Station 7358 (Tanegashima) (position solved, acc. 10 mm) 7358 1 Nov 05 17:51 LAG1 3 0 22 -23 +- 25 25 +- 104 1 7358 1 Nov 05 18:39 LAG2 4 0 12 6 +- 58 -10 +- 102 0 7358 2 Nov 05 06:13 LAG1 9 0 5 3 +- 14 -2 +- 27 3 Station 7405 (Concepcion) (position solved, acc. 20 mm) 7405 5 Nov 05 11:15 LAG1 5 0 22 12 +- 99 -19 +- 57 2 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 30 Oct 05 01:43 LAG1 19 0 36 -37 +- 44 1 +- 22 3 7810 30 Oct 05 03:19 LAG2 20 0 21 -15 +- 41 5 +- 21 2 7810 30 Oct 05 05:19 LAG1 23 0 22 -22 +- 38 -1 +- 23 2 7810 30 Oct 05 07:23 LAG2 23 0 22 -15 +- 38 10 +- 25 3 7810 30 Oct 05 17:26 LAG1 24 0 19 -15 +- 37 4 +- 17 4 7810 30 Oct 05 21:01 LAG1 12 0 37 -24 +- 71 9 +- 42 2 7810 30 Oct 05 21:25 LAG2 16 0 20 -17 +- 47 9 +- 29 3 7810 31 Oct 05 00:27 LAG1 15 0 17 -17 +- 48 2 +- 25 2 7810 31 Oct 05 01:28 LAG2 15 0 14 -7 +- 49 9 +- 31 3 7810 31 Oct 05 03:53 LAG1 17 0 19 -19 +- 44 1 +- 19 3 7810 31 Oct 05 05:27 LAG2 19 0 12 -14 +- 52 2 +- 27 4 7810 1 Nov 05 14:43 LAG1 9 0 17 11 +- 61 -7 +- 41 6 7810 1 Nov 05 18:15 LAG1 24 0 27 -14 +- 38 9 +- 18 3 7810 1 Nov 05 21:39 LAG2 2 0 23 -184 +-5319 -77 +-2540 0 7810 1 Nov 05 22:05 LAG1 9 0 18 -22 +- 78 7 +- 61 1 7810 2 Nov 05 01:17 LAG1 21 0 7 -4 +- 41 3 +- 22 4 7810 2 Nov 05 01:35 LAG2 25 0 25 -2 +- 36 14 +- 21 4 7810 3 Nov 05 00:04 LAG1 3 0 24 -34 +- 161 -16 +- 181 0 7810 3 Nov 05 00:09 LAG2 6 0 18 -18 +- 199 0 +- 205 2 7810 3 Nov 05 08:03 LAG2 13 0 14 -7 +- 70 14 +- 59 6 7810 3 Nov 05 15:33 LAG1 11 0 12 -10 +- 56 -5 +- 39 3 7810 3 Nov 05 18:13 LAG2 3 0 10 -15 +- 257 -21 +- 909 2 7810 3 Nov 05 19:11 LAG1 14 0 24 -12 +- 48 13 +- 29 3 7810 3 Nov 05 22:05 LAG2 13 0 6 -4 +- 63 4 +- 47 3 7810 3 Nov 05 22:37 LAG1 15 0 44 -36 +- 47 12 +- 30 3 7810 4 Nov 05 02:09 LAG1 4 0 19 -36 +- 409 -10 +- 253 4 7810 4 Nov 05 02:23 LAG2 4 0 17 -33 +- 443 37 +- 353 4 7810 5 Nov 05 19:59 LAG1 15 0 31 -26 +- 47 10 +- 26 3 7810 5 Nov 05 21:59 LAG2 17 0 12 -13 +- 47 -1 +- 31 3 7810 5 Nov 05 23:23 LAG1 12 0 48 -48 +- 52 2 +- 36 3 7810 6 Nov 05 02:25 LAG2 2 0 23 -8 +-1050 17 +-1252 0 7810 6 Nov 05 02:58 LAG1 14 0 26 -14 +- 57 -9 +- 34 3 7810 6 Nov 05 06:13 LAG2 12 0 20 -7 +- 59 9 +- 35 2 7810 6 Nov 05 06:55 LAG1 4 0 34 -15 +- 482 -20 +- 529 1 7810 6 Nov 05 15:05 LAG1 17 0 4 -1 +- 44 2 +- 37 2 7810 6 Nov 05 18:29 LAG1 14 0 13 -11 +- 57 1 +- 31 5 7810 6 Nov 05 20:13 LAG2 16 0 29 -27 +- 45 6 +- 36 3 7810 6 Nov 05 22:03 LAG1 15 0 18 -17 +- 48 0 +- 29 3 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 3 Nov 05 19:17 LAG1 11 0 23 11 +- 57 13 +- 48 5 7811 3 Nov 05 22:03 LAG2 11 0 33 30 +- 55 9 +- 44 11 7811 3 Nov 05 22:39 LAG1 10 0 19 0 +- 60 14 +- 58 13 7811 4 Nov 05 02:10 LAG2 4 0 42 -23 +- 309 -60 +- 300 13 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 31 Oct 05 19:39 LAG2 3 0 58 56 +- 181 -4 +- 505 1 7824 1 Nov 05 02:51 LAG1 8 0 42 49 +- 57 -14 +- 57 3 7824 1 Nov 05 21:42 LAG2 7 0 80 81 +- 55 -2 +- 56 7 7824 2 Nov 05 01:47 LAG2 5 0 75 87 +- 107 22 +- 171 3 7824 2 Nov 05 20:47 LAG1 12 0 30 29 +- 36 2 +- 25 4 7824 3 Nov 05 00:05 LAG2 5 0 31 58 +- 343 -17 +- 220 1 7824 3 Nov 05 19:29 LAG1 11 0 82 77 +- 37 14 +- 33 3 7824 4 Nov 05 21:41 LAG1 3 0 26 28 +- 80 27 +- 354 1 7824 4 Nov 05 23:55 LAG2 17 0 51 50 +- 29 -7 +- 25 3 7824 5 Nov 05 20:15 LAG1 6 0 47 67 +- 91 28 +- 95 2 7824 5 Nov 05 22:09 LAG2 2 0 69 102 +-1295 42 +-1658 0 7824 6 Nov 05 02:03 LAG2 21 0 37 37 +- 27 6 +- 19 5 7824 6 Nov 05 02:53 LAG1 14 0 35 34 +- 33 -2 +- 24 4 7824 6 Nov 05 18:57 LAG1 15 0 65 68 +- 40 -3 +- 23 6 7824 6 Nov 05 20:19 LAG2 13 0 42 45 +- 52 -2 +- 42 3 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 31 Oct 05 05:49 LAG1 10 1 7 0 +- 14 1 +- 8 7 7825 31 Oct 05 07:27 LAG2 5 0 2 -1 +- 38 -2 +- 26 0 7825 1 Nov 05 04:49 LAG1 3 0 18 0 +- 168 -15 +- 153 7 7825 1 Nov 05 05:45 LAG2 9 0 17 -7 +- 21 -11 +- 21 1 7825 1 Nov 05 08:03 LAG1 7 0 9 -4 +- 16 -4 +- 12 7 7825 1 Nov 05 20:37 LAG1 7 0 11 -1 +- 17 5 +- 11 7 7825 1 Nov 05 23:29 LAG2 3 0 51 20 +- 24 31 +- 16 1 7825 1 Nov 05 23:58 LAG1 8 2 7 -2 +- 17 0 +- 38 7 7825 2 Nov 05 03:42 LAG2 8 0 10 -2 +- 21 5 +- 16 8 7825 2 Nov 05 06:43 LAG1 15 0 19 -10 +- 11 13 +- 7 3 7825 2 Nov 05 07:39 LAG2 22 0 2 0 +- 9 1 +- 5 1 7825 2 Nov 05 11:51 LAG2 5 0 8 -10 +- 28 -11 +- 82 3 7825 2 Nov 05 19:01 LAG1 23 0 9 5 +- 8 -3 +- 4 4 7825 2 Nov 05 21:29 LAG2 4 0 49 27 +- 161 -16 +- 118 1 7825 4 Nov 05 03:43 LAG2 8 0 12 -10 +- 43 0 +- 38 5 7825 4 Nov 05 04:05 LAG1 14 0 12 -2 +- 14 9 +- 9 2 7825 4 Nov 05 07:53 LAG1 3 0 27 -34 +- 362 34 +- 201 0 7825 4 Nov 05 07:59 LAG2 17 0 7 4 +- 10 2 +- 8 4 7825 5 Nov 05 05:53 LAG2 3 0 62 976 +- 809 460 +- 401 26*CHK* 7825 5 Nov 05 06:29 LAG1 3 0 13 -27 +- 397 7 +- 205 2 7825 6 Nov 05 04:13 LAG2 7 2 9 -24 +- 91 12 +- 66 4 7825 6 Nov 05 04:45 LAG1 11 0 7 -3 +- 14 -2 +- 12 6 7825 6 Nov 05 08:00 LAG2 18 2 12 8 +- 10 4 +- 6 4 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 30 Oct 05 00:00 LAG2 2 0 10 -24 +- 339 74 +- 741 0 7832 30 Oct 05 01:29 LAG1 6 0 4 -8 +- 129 -2 +- 64 2 7832 30 Oct 05 03:51 LAG2 9 0 13 22 +- 63 6 +- 38 3 7832 30 Oct 05 14:01 LAG1 8 0 9 -50 +- 135 -20 +- 57 2 7832 30 Oct 05 17:31 LAG2 7 0 4 1 +- 64 4 +- 57 2 7832 30 Oct 05 17:45 LAG1 6 0 24 -28 +- 32 19 +- 29 3 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 31 Oct 05 08:43 LAG1 22 0 45 41 +- 20 -10 +- 10 5 7838 31 Oct 05 12:01 LAG2 9 0 21 71 +- 142 30 +- 77 2 7838 1 Nov 05 07:19 LAG1 22 0 20 13 +- 20 -7 +- 11 7 7838 1 Nov 05 10:15 LAG2 18 0 24 22 +- 22 8 +- 21 5 7838 1 Nov 05 10:59 LAG1 16 0 34 34 +- 24 -5 +- 17 5 7838 1 Nov 05 14:17 LAG2 19 0 52 48 +- 22 10 +- 16 6 7838 4 Nov 05 07:01 LAG1 10 0 37 31 +- 34 11 +- 38 8 7838 5 Nov 05 10:39 LAG2 19 0 53 52 +- 22 10 +- 17 10 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 30 Oct 05 05:31 LAG1 17 0 9 -9 +- 16 1 +- 11 2 7840 30 Oct 05 07:33 LAG2 14 0 8 -3 +- 19 8 +- 17 2 7840 31 Oct 05 16:17 LAG1 14 0 34 34 +- 17 -10 +- 16 2 7840 31 Oct 05 19:43 LAG1 8 0 6 -2 +- 23 2 +- 14 3 7840 31 Oct 05 19:47 LAG2 7 0 14 6 +- 25 -20 +- 37 2 7840 2 Nov 05 23:39 LAG2 10 0 13 12 +- 27 0 +- 14 1 7840 2 Nov 05 23:59 LAG1 7 0 17 -9 +- 38 -13 +- 22 2 7840 3 Nov 05 19:47 LAG1 3 0 19 48 +- 951 -10 +- 350 0 7840 3 Nov 05 22:03 LAG2 12 0 30 23 +- 20 13 +- 20 2 7840 3 Nov 05 22:41 LAG1 10 0 24 -9 +- 27 11 +- 18 2 7840 4 Nov 05 20:05 LAG2 9 0 20 11 +- 22 -11 +- 15 2 7840 4 Nov 05 21:21 LAG1 11 0 4 -2 +- 19 0 +- 11 4 7840 4 Nov 05 23:54 LAG2 5 0 4 3 +- 32 0 +- 16 2 7840 5 Nov 05 00:53 LAG1 11 0 13 6 +- 19 -8 +- 13 4 7840 5 Nov 05 08:15 LAG2 6 0 24 -24 +- 27 0 +- 70 2 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 2 Nov 05 05:09 LAG1 4 0 14 6 +- 35 16 +- 81 4 7841 2 Nov 05 05:55 LAG2 13 0 4 1 +- 11 -2 +- 11 3 7841 2 Nov 05 20:13 LAG2 5 0 11 7 +- 48 -21 +- 56 1 7841 2 Nov 05 20:43 LAG1 5 0 26 -26 +- 19 8 +- 37 5 7841 5 Nov 05 16:19 LAG1 14 0 11 4 +- 17 -3 +- 10 4 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 31 Oct 05 16:33 LAG1 6 0 59 64 +- 34 -5 +- 30 1 7941 31 Oct 05 19:49 LAG2 4 0 11 -2 +- 21 -39 +- 77 1 7941 1 Nov 05 06:23 LAG1 6 0 18 -9 +- 18 -30 +- 58 7 7941 1 Nov 05 07:53 LAG2 7 0 8 5 +- 24 0 +- 37 6 7941 1 Nov 05 15:09 LAG1 9 0 7 10 +- 27 -11 +- 21 2 7941 1 Nov 05 21:51 LAG2 3 0 4 11 +- 91 9 +- 118 0 7941 2 Nov 05 17:15 LAG1 4 0 7 0 +- 45 -11 +- 65 0 7941 2 Nov 05 20:03 LAG2 2 0 8 14 +- 50 146 +- 593 0 7941 4 Nov 05 14:39 LAG1 5 0 5 -7 +- 75 2 +- 67 1 7941 5 Nov 05 16:31 LAG1 5 0 11 32 +- 107 21 +- 54 1 7941 5 Nov 05 22:07 LAG2 11 0 3 4 +- 21 2 +- 15 2 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 3 Nov 05 15:43 LAG1 3 0 3 -12 +- 220 -7 +- 173 0 8834 3 Nov 05 19:25 LAG1 3 0 27 -26 +- 24 23 +- 105 1 8834 3 Nov 05 22:11 LAG2 2 0 3 -4 +- 129 -23 +- 385 0 8834 4 Nov 05 02:07 LAG2 7 0 10 4 +- 32 13 +- 30 2 8834 4 Nov 05 06:14 LAG2 8 0 17 -20 +- 17 8 +- 17 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 - 051102 0/ 18/ 0 0/ 17/ 0 35 1831 LVIL 050117 - 051103 0/ 90/ 0 0/ 35/ 0 125 1864 MD2LAS 050110 - 051102 0/144/ 0 0/ 70/ 0 214 1873 SIMLAS 050316 - 051027 0/ 68/ 0 0/ 23/ 0 91 1884 RIGLAS 050104 - 051103 0/111/ 0 3/ 60/ 3 177 1893 CRMLAS 050723 - 051013 0/ 17/ 0 0/ 0/ 0 17 6405 TIGO 050104 - 051105 48/ 26/ 5 41/ 52/ 5 177 6810 ZIMLAT 050101 - 051107 265/253/ 32 259/139/ 28 976 7080 MLRS25 050101 - 051106 42/ 94/ 4 30/ 86/ 10 266 7090 ML0514 050101 - 051106 191/436/ 50 166/398/ 34 1275 7105 ML0725 050108 - 051105 13/ 98/ 11 31/ 90/ 12 255 7110 ML0414 050118 - 051105 107/222/ 37 76/153/ 14 609 7124 ML0819 050118 - 051102 1/ 43/ 2 1/ 41/ 1 89 7130 TL04** 050803 - 051103 8/ 26/ 1 12/ 10/ 2 59 7237 CHALAS 050102 - 051106 0/127/ 2 0/ 99/ 0 228 7249 BEJLAS 050101 - 051106 0/105/ 0 0/ 84/ 0 189 7308 CRLLAS 050111 - 050510 7/ 5/ 1 1/ 10/ 0 24 7355 TROS02 050603 - 050906 0/ 46/ 0 0/ 7/ 0 53 7358 GMSL 050802 - 051102 1/ 13/ 0 2/ 5/ 0 21 7405 TIGO 050105 - 051105 6/ 30/ 0 3/ 16/ 0 55 7501 ML0616 050117 - 051023 51/129/ 6 41/126/ 7 360 7806 METLAS 050301 - 050301 0/ 0/ 0 0/ 1/ 0 1 7810 ZIMLAT 050101 - 051107 242/249/ 31 253/132/ 28 935 7811 POLLAS 050111 - 051104 0/117/ 0 0/ 58/ 0 175 7824 SPNLAS 050108 - 051107 11/185/ 8 10/124/ 8 346 7825 STL3 050101 - 051106 385/366/ 45 248/321/ 36 1401 7832 SALRO 050101 - 051030 132/302/ 31 179/259/ 27 930 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 - 051105 54/111/ 4 42/101/ 6 318 7839 AUSLAS 050103 - 051028 183/193/ 29 160/127/ 16 708 7840 RGOLAS 050102 - 051105 220/221/ 38 197/125/ 26 827 7841 GFZLA3 050105 - 051105 51/109/ 15 23/ 79/ 10 287 7848 FTLR06 050515 - 051027 6/ 47/ 2 4/ 19/ 3 81 7941 MLROnn 050102 - 051105 72/164/ 12 111/121/ 22 502 8834 WLRS01 050109 - 051104 214/238/ 40 213/159/ 26 890 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 051031.0 70.6 +/- 0.1 399.9 +/- 0.1 -32679.56 +/- 0.02 051101.0 70.4 +/- 0.1 399.5 +/- 0.1 -32680.65 +/- 0.03 051102.0 72.6 +/- 0.1 398.8 +/- 0.1 -32681.60 +/- 0.03 051103.0 71.5 +/- 0.2 398.9 +/- 0.1 -32682.40 +/- 0.04 051104.0 72.9 +/- 0.1 397.0 +/- 0.1 -32682.95 +/- 0.05 051105.0 72.5 +/- 0.1 396.8 +/- 0.1 -32683.32 +/- 0.05 051106.0 72.0 +/- 0.1 396.4 +/- 0.1 -32683.67 +/- 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 ******************************************************************************** |