| Date: | 2004-10-05 07:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4384: Delft QL Report October 05, 2004 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2004-10-05 07:15:00 UTC Message No. 4384 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report October 05, 2004 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS October 5, 2004 This is a weekly 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, Oct 4, 2004. 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, Oct 4, 2004. 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) 040926 - 041002 6 5 1884 Riga, Latvia 040928 - 041002 3 2 1893 Kazivili, Crimea, Ukraine 041001 - 041003 1 1 6810 Zimmerwald 846, Switzerland 040928 - 040928 1 1 7080 McDonald Obs., Fort Davis, TX 040929 - 040929 1 - 7090 Yarragadee, Australia 040927 - 041003 13 7 7105 Greenbelt, Maryland 041001 - 041001 1 2 7110 Monument Peak, California 041001 - 041001 2 2 7124 Papeete, Tahiti 040928 - 041002 6 1 7231 Wuhan, China (new) 041002 - 041002 1 1 7237 Changchun, China 040927 - 041003 6 10 7249 Beijing, China 040922 - 041003 7 12 7501 Hartebeesthoek, SA (MOB-6) 040928 - 041002 - 8 7806 Metsahovi, Finland 041001 - 041001 1 2 7810 Zimmerwald 423, Switzerland 040928 - 041004 10 8 7824 San Fernando, Spain 040927 - 041002 5 9 7825 Mount Stromlo, Australia 041002 - 041002 1 1 7832 Riyad, Saudi Arabia 040927 - 041004 16 16 7835 Grasse, France 040816 - 040930 3 3 7837 Shanghai Observatory, China 040929 - 041002 4 3 7838 Simosato Observatory, Japan 041001 - 041001 - 1 7839 Graz, Austria 040926 - 041004 14 10 8834 Wettzell, Germany 040930 - 041004 9 7 ------ ------ --- --- TOTAL 040816 - 041004 111 112 ------------------------------------------------------------------------------ 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 Sat, Sep 25, 2004 to Sun, Oct 3, 2004. 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 21 21 Number of Passes 109/106 121/120 Number of Normal Points 911/ 882 1247/1228 Weighted RMS of Fit (mm) 12 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 Sep 04 14:37 LAG1 8 0 49 5 +- 214 -19 +- 104 28 1864 26 Sep 04 16:57 LAG1 7 0 24 23 +- 227 -2 +- 194 4 1864 26 Sep 04 19:05 LAG2 3 0 25 52 +-4673 47 +-2905 0 1864 27 Sep 04 15:53 LAG1 4 0 34 -3 +-2608 -14 +-1310 11 1864 27 Sep 04 17:05 LAG2 14 0 28 -25 +- 160 3 +- 146 13 1864 28 Sep 04 17:42 LAG1 6 0 13 5 +- 250 -2 +- 140 11 1864 28 Sep 04 19:15 LAG2 6 0 23 21 +- 244 5 +- 124 4 1864 29 Sep 04 16:15 LAG1 8 0 41 35 +- 212 -7 +- 101 13 1864 29 Sep 04 17:23 LAG2 4 0 6 -33 +-2036 -27 +-1676 4 1864 30 Sep 04 14:58 LAG1 8 0 43 38 +- 215 -12 +- 121 16 1864 2 Oct 04 15:39 LAG1 8 0 21 27 +- 410 8 +- 239 13 1864 2 Oct 04 19:43 LAG2 6 0 21 12 +- 338 -3 +- 230 12 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 25 Sep 04 18:45 LAG1 9 0 22 -10 +- 175 -9 +- 125 4 1884 26 Sep 04 18:47 LAG2 14 0 11 -8 +- 80 0 +- 77 8 1884 28 Sep 04 17:57 LAG1 16 0 19 -18 +- 75 -4 +- 50 5 1884 28 Sep 04 19:01 LAG2 9 0 33 -26 +- 108 16 +- 67 15 1884 28 Sep 04 21:43 LAG1 8 0 7 -1 +- 106 -7 +- 197 5 1884 28 Sep 04 23:04 LAG2 12 0 7 1 +- 88 -6 +- 93 4 1884 2 Oct 04 19:33 LAG1 10 0 23 11 +- 161 -9 +- 116 2 Station 1893 (Kazivili) (position fixed, acc. 100 mm) 1893 1 Oct 04 17:29 LAG1 7 0 32 -20 +- 189 9 +- 184 29 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 28 Sep 04 21:21 LAG1 20 0 18 -16 +- 40 -3 +- 23 5 6810 28 Sep 04 22:51 LAG2 16 0 23 -23 +- 51 -1 +- 35 6 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 29 Sep 04 17:30 LAG1 6 0 5 2 +- 27 -3 +- 22 3 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 25 Sep 04 14:03 LAG1 2 0 7 -15 +- 98 -18 +- 229 0 7090 26 Sep 04 12:27 LAG1 11 0 5 2 +- 12 -3 +- 15 3 7090 26 Sep 04 15:53 LAG1 20 0 4 -1 +- 9 1 +- 4 2 7090 26 Sep 04 19:31 LAG1 9 0 7 -1 +- 14 10 +- 22 2 7090 26 Sep 04 19:57 LAG2 23 0 8 -4 +- 8 4 +- 5 4 7090 27 Sep 04 00:29 LAG2 9 1 18 -22 +- 31 13 +- 34 12 7090 27 Sep 04 02:22 LAG1 11 0 11 -24 +- 30 10 +- 15 3 7090 27 Sep 04 21:37 LAG1 6 0 11 18 +- 28 -17 +- 44 1 7090 27 Sep 04 22:19 LAG2 10 0 13 9 +- 13 -12 +- 14 1 7090 28 Sep 04 01:07 LAG1 8 0 18 -25 +- 71 3 +- 32 3 7090 28 Sep 04 06:47 LAG2 7 0 9 -9 +- 19 -13 +- 28 2 7090 28 Sep 04 13:19 LAG1 15 0 6 -3 +- 11 3 +- 7 2 7090 28 Sep 04 16:43 LAG1 19 0 7 5 +- 9 -2 +- 6 1 7090 28 Sep 04 20:13 LAG2 17 0 17 -14 +- 10 6 +- 6 1 7090 28 Sep 04 20:25 LAG1 4 0 5 6 +- 69 -15 +- 99 0 7090 28 Sep 04 23:43 LAG1 6 0 8 -17 +- 50 8 +- 38 4 7090 29 Sep 04 00:38 LAG2 8 0 16 -16 +- 16 0 +- 28 4 7090 29 Sep 04 12:05 LAG1 7 0 5 2 +- 17 7 +- 41 1 7090 29 Sep 04 15:19 LAG1 16 0 3 1 +- 10 -1 +- 5 1 7090 30 Sep 04 13:59 LAG1 11 0 17 -22 +- 32 -3 +- 17 1 7090 30 Sep 04 17:43 LAG1 12 0 11 -4 +- 14 -7 +- 13 2 7090 1 Oct 04 23:07 LAG2 6 0 16 -16 +- 100 0 +- 67 0 7090 1 Oct 04 23:17 LAG1 4 0 10 9 +- 212 0 +- 119 6 7090 2 Oct 04 02:47 LAG1 5 0 8 -31 +- 186 17 +- 82 2 7090 2 Oct 04 03:05 LAG2 11 0 3 -2 +- 13 2 +- 17 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 1 Oct 04 02:07 LAG1 15 0 8 -6 +- 11 -1 +- 5 2 7105 1 Oct 04 02:59 LAG2 7 0 7 0 +- 33 -3 +- 17 2 7105 1 Oct 04 06:41 LAG2 20 0 15 -15 +- 10 -4 +- 6 3 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 1 Oct 04 02:35 LAG1 8 0 8 -24 +- 51 11 +- 29 3 7110 1 Oct 04 02:51 LAG2 5 0 4 56 +- 313 -26 +- 154 2 7110 1 Oct 04 05:39 LAG1 7 0 14 0 +- 19 8 +- 13 5 7110 1 Oct 04 06:29 LAG2 16 0 19 -14 +- 10 -9 +- 7 4 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 28 Sep 04 09:27 LAG1 6 0 6 -20 +- 77 -8 +- 41 2 7124 29 Sep 04 08:01 LAG1 6 0 15 53 +- 152 15 +- 63 2 7124 29 Sep 04 11:43 LAG1 4 0 19 -21 +- 28 -12 +- 84 3 7124 30 Sep 04 10:17 LAG1 4 0 7 -11 +- 88 -3 +- 59 3 7124 30 Sep 04 13:09 LAG2 6 0 7 7 +- 25 -1 +- 40 2 7124 2 Oct 04 07:28 LAG1 6 0 3 17 +- 115 6 +- 53 2 7124 2 Oct 04 11:05 LAG1 4 0 4 -2 +- 101 1 +- 96 1 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 2 Oct 04 15:43 LAG1 6 0 14 -22 +- 128 26 +- 153 8 7231 2 Oct 04 16:03 LAG2 2 0 5 403 +-9799 225 +-5440 0 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 26 Sep 04 11:29 LAG2 4 0 11 16 +- 171 -17 +- 168 8 7237 26 Sep 04 13:17 LAG1 4 0 10 11 +- 79 8 +- 133 1 7237 26 Sep 04 15:36 LAG2 6 0 9 8 +- 87 -8 +- 96 7 7237 26 Sep 04 19:44 LAG2 2 0 55 88 +-1106 -43 +-1463 0 7237 27 Sep 04 11:43 LAG1 16 0 25 22 +- 38 -3 +- 23 8 7237 27 Sep 04 13:17 LAG2 20 0 24 16 +- 37 -15 +- 23 5 7237 28 Sep 04 10:21 LAG1 21 4 996 996 +- 37 0 +- 23 4*CHK* 7237 28 Sep 04 11:26 LAG2 8 4 1012 1008 +- 147 -3 +- 133 13*CHK* 7237 28 Sep 04 13:59 LAG1 4 0 963 658 +- 358 -236 +- 274 34*CHK* 7237 29 Sep 04 12:31 LAG1 13 0 42 44 +- 45 10 +- 32 7 7237 29 Sep 04 13:41 LAG2 12 0 44 40 +- 44 -15 +- 33 12 7237 29 Sep 04 17:59 LAG2 3 0 74 77 +- 107 -39 +- 545 10 7237 1 Oct 04 10:19 LAG2 2 0 24 6 +-5879 -14 +-2695 0 7237 1 Oct 04 14:15 LAG2 11 0 9 -9 +- 149 9 +- 90 6 7237 1 Oct 04 17:57 LAG2 11 0 28 25 +- 50 -3 +- 45 4 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 25 Sep 04 11:00 LAG1 12 0 10 2 +- 44 0 +- 33 10 7249 25 Sep 04 13:01 LAG2 16 0 22 -19 +- 39 -7 +- 31 10 7249 25 Sep 04 14:33 LAG1 10 0 39 -31 +- 50 -30 +- 49 13 7249 25 Sep 04 17:09 LAG2 20 0 7 -4 +- 34 0 +- 23 6 7249 27 Sep 04 13:27 LAG2 12 0 15 6 +- 48 -3 +- 52 14 7249 27 Sep 04 17:49 LAG2 5 0 17 28 +- 214 -21 +- 228 14 7249 30 Sep 04 19:53 LAG2 14 0 33 26 +- 42 -23 +- 43 14 7249 1 Oct 04 13:15 LAG1 11 0 25 -12 +- 86 7 +- 51 8 7249 1 Oct 04 13:49 LAG2 12 0 14 7 +- 49 14 +- 45 3 7249 1 Oct 04 17:09 LAG1 8 0 22 -17 +- 58 8 +- 169 15 7249 1 Oct 04 18:05 LAG2 13 0 10 0 +- 51 -1 +- 37 10 7249 2 Oct 04 11:49 LAG2 16 0 10 6 +- 38 -3 +- 35 7 7249 2 Oct 04 12:13 LAG1 10 0 7 -3 +- 86 4 +- 51 4 7249 2 Oct 04 15:33 LAG1 13 0 26 19 +- 44 -9 +- 43 11 7249 2 Oct 04 15:59 LAG2 20 0 20 15 +- 34 8 +- 25 7 7249 2 Oct 04 20:09 LAG2 10 0 31 -15 +- 49 -30 +- 96 20 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 26 Sep 04 09:51 LAG2 19 0 7 2 +- 9 3 +- 7 4 7501 26 Sep 04 13:59 LAG2 10 0 6 10 +- 22 6 +- 19 1 7501 26 Sep 04 23:47 LAG2 2 0 27 83 +- 283 143 +- 708 0 7501 27 Sep 04 03:43 LAG2 7 0 7 3 +- 21 12 +- 31 2 7501 27 Sep 04 08:05 LAG2 3 0 26 30 +- 71 11 +- 205 0 7501 28 Sep 04 01:41 LAG2 12 0 15 9 +- 12 -9 +- 9 1 7501 28 Sep 04 10:06 LAG2 8 0 24 45 +- 54 16 +- 35 10 7501 29 Sep 04 00:13 LAG2 2 0 2 -39 +- 491 52 +- 655 0 7501 30 Sep 04 06:05 LAG2 7 1 9 29 +- 57 26 +- 58 2 7501 1 Oct 04 00:15 LAG2 6 0 13 -9 +- 18 36 +- 54 2 7501 1 Oct 04 04:03 LAG2 4 0 59 -31 +- 239 16 +- 145 3 7501 1 Oct 04 08:31 LAG2 2 0 1 18 +- 478 18 +- 483 0 7501 2 Oct 04 02:17 LAG2 11 0 7 -7 +- 15 5 +- 11 2 Station 7806 (Metsahovi) (position fixed, acc. 30 mm) 7806 1 Oct 04 17:27 LAG2 3 0 12 44 +- 198 61 +- 287 1 7806 1 Oct 04 17:47 LAG1 5 0 8 -5 +- 262 5 +- 135 6 7806 1 Oct 04 21:22 LAG2 8 0 9 9 +- 49 7 +- 57 7 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 28 Sep 04 21:21 LAG1 21 0 8 -4 +- 39 -3 +- 22 4 7810 28 Sep 04 22:51 LAG2 16 0 6 -6 +- 53 -2 +- 37 2 7810 1 Oct 04 03:19 LAG2 4 0 7 5 +- 142 -7 +- 453 1 7810 1 Oct 04 10:28 LAG1 4 0 37 -6 +- 92 25 +- 64 1 7810 1 Oct 04 14:01 LAG1 10 0 12 4 +- 63 9 +- 44 2 7810 1 Oct 04 17:08 LAG2 10 0 13 10 +- 64 4 +- 55 3 7810 1 Oct 04 17:21 LAG1 9 0 14 9 +- 61 7 +- 37 3 7810 1 Oct 04 20:49 LAG1 7 0 4 1 +- 80 -1 +- 49 2 7810 1 Oct 04 21:15 LAG2 16 0 7 -3 +- 48 -3 +- 33 3 7810 2 Oct 04 01:14 LAG2 22 0 23 -12 +- 39 -13 +- 28 2 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 26 Sep 04 22:31 LAG2 24 0 56 57 +- 25 -6 +- 19 5 7824 27 Sep 04 00:34 LAG1 4 0 51 27 +- 366 22 +- 341 7 7824 27 Sep 04 02:41 LAG2 8 0 67 90 +- 198 13 +- 115 8 7824 27 Sep 04 19:29 LAG1 4 0 80 66 +- 92 -38 +- 203 0 7824 27 Sep 04 20:55 LAG2 14 0 33 59 +- 78 -21 +- 52 2 7824 27 Sep 04 22:50 LAG1 2 0 101 290 +-1570 105 +- 868 0 7824 28 Sep 04 00:55 LAG2 11 0 62 68 +- 41 -26 +- 22 7 7824 28 Sep 04 19:09 LAG2 1 0 82 0 +- 0 0 +- 0 0 7824 28 Sep 04 23:21 LAG2 8 0 37 60 +- 234 -13 +- 135 3 7824 29 Sep 04 20:13 LAG1 1 0 73 0 +- 0 0 +- 0 0 7824 29 Sep 04 20:49 LAG2 9 0 62 54 +- 92 -7 +- 76 3 7824 30 Sep 04 18:59 LAG1 2 0 29 25 +- 173 -20 +- 801 0 7824 30 Sep 04 19:27 LAG2 3 0 47 177 +-2086 -64 +-1033 1 7824 30 Sep 04 22:15 LAG1 3 0 111 117 +- 741 2 +- 384 5 7824 1 Oct 04 03:13 LAG2 7 0 70 80 +- 145 8 +- 120 2 7824 1 Oct 04 21:06 LAG2 1 0 52 0 +- 0 0 +- 0 0 7824 2 Oct 04 01:53 LAG2 6 0 31 41 +- 555 -5 +- 252 9 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 25 Sep 04 17:11 LAG1 1 0 23 0 +- 0 0 +- 0 0 7825 25 Sep 04 18:02 LAG2 12 0 5 -3 +- 29 -1 +- 17 4 7825 2 Oct 04 14:49 LAG1 11 0 3 0 +- 13 -1 +- 12 3 7825 2 Oct 04 16:53 LAG2 12 0 4 -1 +- 14 -3 +- 10 2 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 25 Sep 04 08:20 LAG1 8 0 1 0 +- 34 0 +- 20 1 7832 25 Sep 04 12:33 LAG2 6 0 6 -2 +- 62 -4 +- 69 5 7832 25 Sep 04 15:00 LAG1 5 0 11 16 +- 48 -19 +- 90 4 7832 25 Sep 04 16:31 LAG2 8 0 15 -17 +- 35 -20 +- 31 2 7832 25 Sep 04 18:03 LAG1 10 0 27 -29 +- 65 -25 +- 31 3 7832 25 Sep 04 20:51 LAG2 11 0 12 -18 +- 59 -20 +- 43 2 7832 26 Sep 04 01:01 LAG2 8 0 17 -33 +- 72 -36 +- 58 2 7832 26 Sep 04 06:55 LAG1 9 0 5 -1 +- 22 -3 +- 21 2 7832 26 Sep 04 10:33 LAG1 6 0 11 -1 +- 64 12 +- 63 3 7832 26 Sep 04 14:49 LAG2 11 0 12 -14 +- 31 4 +- 27 5 7832 26 Sep 04 16:50 LAG1 8 0 4 -2 +- 42 1 +- 35 2 7832 26 Sep 04 18:55 LAG2 9 0 20 -22 +- 46 -2 +- 58 1 7832 26 Sep 04 20:21 LAG1 11 0 4 1 +- 23 4 +- 24 2 7832 26 Sep 04 23:03 LAG2 12 0 8 -14 +- 45 -6 +- 29 4 7832 27 Sep 04 12:57 LAG2 7 0 4 6 +- 46 -9 +- 48 1 7832 27 Sep 04 15:45 LAG1 8 0 23 28 +- 39 -11 +- 40 10 7832 27 Sep 04 16:43 LAG2 11 0 16 -36 +- 51 -22 +- 42 3 7832 27 Sep 04 18:53 LAG1 5 0 53 -31 +- 278 -37 +- 121 2 7832 27 Sep 04 21:17 LAG2 11 0 18 -20 +- 22 -6 +- 29 2 7832 28 Sep 04 01:15 LAG2 9 0 12 -28 +- 51 -28 +- 50 2 7832 28 Sep 04 07:37 LAG1 8 0 10 -8 +- 25 -4 +- 13 4 7832 28 Sep 04 14:47 LAG2 21 0 16 3 +- 14 11 +- 10 1 7832 28 Sep 04 17:35 LAG1 9 0 4 -9 +- 46 -5 +- 30 1 7832 28 Sep 04 19:09 LAG2 12 0 6 -9 +- 31 -7 +- 36 3 7832 28 Sep 04 21:19 LAG1 8 0 17 15 +- 27 7 +- 53 2 7832 28 Sep 04 23:23 LAG2 7 0 4 0 +- 25 -2 +- 13 2 7832 29 Sep 04 06:13 LAG1 7 0 7 -14 +- 87 -13 +- 55 2 7832 29 Sep 04 09:53 LAG1 9 0 4 0 +- 24 -3 +- 28 2 7832 29 Sep 04 12:55 LAG2 15 0 6 -4 +- 17 -2 +- 14 3 7832 29 Sep 04 16:37 LAG1 7 0 23 15 +- 93 4 +- 54 1 7832 29 Sep 04 17:03 LAG2 6 0 6 -28 +- 146 -20 +- 122 1 7832 1 Oct 04 21:37 LAG2 8 0 8 -31 +- 109 -15 +- 66 2 7832 2 Oct 04 05:49 LAG1 6 0 3 -2 +- 29 1 +- 23 3 7832 2 Oct 04 09:23 LAG1 5 0 11 11 +- 32 -1 +- 65 1 7832 2 Oct 04 19:23 LAG1 9 0 5 3 +- 28 0 +- 27 4 7832 2 Oct 04 19:41 LAG2 11 0 2 2 +- 37 0 +- 39 1 7832 2 Oct 04 23:51 LAG2 5 0 18 -10 +- 148 -21 +- 113 0 Station 7835 (Grasse) (position fixed, acc. 30 mm) 7835 28 Sep 04 00:39 LAG2 17 0 35 -4 +- 30 -23 +- 19 4 7835 28 Sep 04 17:59 LAG1 16 0 4 0 +- 24 0 +- 17 4 7835 28 Sep 04 18:47 LAG2 15 0 6 6 +- 26 2 +- 23 1 7835 29 Sep 04 20:52 LAG2 15 0 15 -16 +- 32 -13 +- 22 3 7835 29 Sep 04 23:57 LAG1 5 0 8 11 +- 72 -9 +- 178 0 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 25 Sep 04 11:03 LAG1 11 0 9 0 +- 52 -2 +- 51 8 7837 25 Sep 04 13:11 LAG2 19 0 25 -11 +- 39 -4 +- 37 20 7837 25 Sep 04 14:39 LAG1 8 0 34 42 +- 118 -47 +- 89 13 7837 25 Sep 04 17:23 LAG2 8 0 10 -7 +- 134 1 +- 112 3 7837 26 Sep 04 11:01 LAG2 19 0 17 8 +- 35 -10 +- 28 7 7837 29 Sep 04 12:26 LAG1 12 0 19 20 +- 52 1 +- 39 4 7837 30 Sep 04 11:11 LAG1 9 0 8 -5 +- 61 -2 +- 65 7 7837 30 Sep 04 11:45 LAG2 13 0 15 -13 +- 52 9 +- 58 11 7837 30 Sep 04 14:47 LAG1 9 0 17 12 +- 56 8 +- 71 6 7837 2 Oct 04 12:11 LAG2 3 0 37 -84 +- 387 86 +- 663 4 7837 2 Oct 04 12:17 LAG1 6 0 22 -72 +- 336 26 +- 166 7 7837 2 Oct 04 16:09 LAG2 7 0 13 23 +- 180 24 +- 144 6 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 25 Sep 04 13:07 LAG2 26 0 22 20 +- 18 -3 +- 14 5 7838 25 Sep 04 17:23 LAG2 22 0 21 20 +- 20 2 +- 14 6 7838 1 Oct 04 09:39 LAG2 13 0 41 41 +- 27 -2 +- 14 7 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 26 Sep 04 17:09 LAG1 19 0 16 -14 +- 10 7 +- 5 2 7839 26 Sep 04 18:35 LAG2 22 0 9 -6 +- 9 4 +- 5 3 7839 26 Sep 04 20:45 LAG1 18 0 7 -1 +- 12 4 +- 7 1 7839 26 Sep 04 22:39 LAG2 27 0 3 -2 +- 8 0 +- 4 1 7839 27 Sep 04 00:33 LAG1 9 0 7 -8 +- 16 16 +- 45 1 7839 27 Sep 04 02:55 LAG2 16 0 1 0 +- 14 -1 +- 13 0 7839 27 Sep 04 08:56 LAG1 5 0 2 2 +- 21 1 +- 19 1 7839 27 Sep 04 16:43 LAG2 6 0 6 -17 +- 53 -9 +- 36 0 7839 28 Sep 04 11:09 LAG1 6 0 10 -17 +- 35 -7 +- 30 0 7839 28 Sep 04 18:19 LAG1 5 0 2 13 +- 124 -7 +- 62 0 7839 28 Sep 04 19:19 LAG2 10 0 2 6 +- 70 -2 +- 34 0 7839 29 Sep 04 09:35 LAG1 16 0 14 -10 +- 11 3 +- 5 3 7839 29 Sep 04 12:59 LAG2 10 0 4 3 +- 13 -2 +- 11 1 7839 29 Sep 04 13:27 LAG1 5 0 14 -11 +- 29 -2 +- 27 0 7839 29 Sep 04 17:07 LAG1 4 0 3 24 +- 420 -8 +- 168 0 7839 29 Sep 04 17:17 LAG2 11 0 4 -10 +- 36 3 +- 19 0 7839 30 Sep 04 15:41 LAG1 6 0 8 17 +- 84 -4 +- 40 1 7839 30 Sep 04 15:43 LAG2 4 0 10 46 +- 648 -15 +- 268 0 7839 30 Sep 04 18:35 LAG1 10 0 7 -6 +- 38 -6 +- 18 1 7839 30 Sep 04 18:59 LAG2 2 0 4 5 +-2662 4 +-1156 0 7839 2 Oct 04 19:13 LAG2 10 0 7 11 +- 28 9 +- 16 1 7839 2 Oct 04 19:27 LAG1 7 0 5 1 +- 38 -2 +- 20 0 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 25 Sep 04 15:23 LAG1 2 0 44 -28 +- 121 -21 +- 164 0 8834 30 Sep 04 08:13 LAG1 7 0 12 -11 +- 19 -10 +- 14 3 8834 30 Sep 04 15:19 LAG2 4 0 22 -23 +- 26 2 +- 79 2 8834 30 Sep 04 15:41 LAG1 5 0 14 -14 +- 103 0 +- 56 2 8834 30 Sep 04 18:39 LAG1 4 0 8 -58 +- 291 -20 +- 116 1 8834 30 Sep 04 18:57 LAG2 13 0 17 -13 +- 14 3 +- 8 2 8834 2 Oct 04 01:27 LAG2 5 0 26 -37 +- 32 -30 +- 66 1 8834 2 Oct 04 12:47 LAG1 6 0 7 6 +- 17 0 +- 23 4 8834 2 Oct 04 15:31 LAG2 6 0 6 -7 +- 22 11 +- 41 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 040314 - 040920 0/ 20/ 0 0/ 9/ 0 29 1831 LVIL 040815 - 040918 0/ 13/ 0 0/ 16/ 0 29 1863 MDNLAS 040103 - 040117 0/ 2/ 0 0/ 4/ 0 6 1864 MD2LAS 040102 - 041002 0/146/ 0 0/ 72/ 0 218 1868 KOMLAS 040315 - 040614 0/ 15/ 0 0/ 3/ 0 18 1873 SIMLAS 040118 - 040813 0/ 33/ 0 0/ 15/ 0 48 1884 RIGLAS 040310 - 041002 0/ 70/ 1 0/ 14/ 0 85 1893 CRMLAS 040331 - 041003 0/ 56/ 0 0/ 36/ 0 92 6405 TIGO 040103 - 040924 2/ 15/ 2 3/ 4/ 0 26 6810 ZIMLAT 040107 - 040928 157/201/ 27 134/127/ 16 662 7080 MLRS25 040104 - 040929 55/ 88/ 12 64/ 82/ 6 307 7090 ML0514 040101 - 041003 206/263/ 44 173/284/ 34 1004 7105 ML0725 040104 - 041001 20/ 96/ 8 5/ 90/ 9 228 7110 ML0414 040102 - 041001 103/215/ 19 112/144/ 21 614 7124 ML0819 040315 - 041002 0/ 33/ 0 0/ 16/ 0 49 7210 HOLLAS 040105 - 040607 33/ 49/ 3 50/ 52/ 6 193 7231 WUHA01 040408 - 041002 0/ 4/ 0 0/ 12/ 0 16 7237 CHALAS 040101 - 041003 0/309/ 6 0/196/ 2 513 7249 BEJLAS 040101 - 041003 0/202/ 1 0/164/ 0 367 7308 CRLLAS 040106 - 040311 5/ 47/ 0 0/ 38/ 2 92 7355 TROS02 040509 - 040829 0/ 82/ 0 0/ 34/ 0 116 7358 GMSL 040901 - 040901 0/ 1/ 0 0/ 1/ 0 2 7405 TIGO 040103 - 040823 0/ 12/ 2 0/ 4/ 0 18 7501 ML0616 040106 - 041002 53/ 50/ 18 85/138/ 14 358 7806 METLAS 040720 - 041001 0/ 5/ 0 0/ 6/ 0 11 7810 ZIMLAT 040507 - 041004 171/117/ 24 118/ 74/ 17 521 7811 POLLAS 040105 - 040921 0/111/ 0 0/ 63/ 0 174 7823 FTLR** 040612 - 040626 0/ 9/ 0 1/ 1/ 1 12 7824 SPNLAS 040109 - 041002 0/127/ 0 0/ 88/ 1 216 7825 STL3 040807 - 041002 17/ 8/ 3 31/ 5/ 3 67 7830 FTLR** 030903 - 030903 0/ 0/ 0 0/ 1/ 0 1 7832 SALRO 040102 - 041004 120/291/ 24 185/274/ 36 930 7835 GRASSE 040301 - 040930 1/ 67/ 3 0/ 36/ 1 108 7836 GFZLAS 040105 - 040701 0/ 38/ 0 0/ 21/ 1 60 7837 CHILAS 040102 - 041002 0/ 72/ 0 0/ 85/ 1 158 7838 SHOLAS 040105 - 041001 23/189/ 2 46/150/ 8 418 7839 AUSLAS 040107 - 041004 117/195/ 29 72/144/ 16 573 7840 RGOLAS 040102 - 040912 132/221/ 39 111/126/ 19 648 7841 GFZLA3 040112 - 040914 25/100/ 16 15/ 68/ 10 234 7845 GRASLL 040318 - 040920 13/ 27/ 0 11/ 14/ 1 66 7941 MLROnn 040111 - 040802 102/141/ 22 102/102/ 9 478 8834 WLRS01 040108 - 041004 203/195/ 40 168/141/ 19 766 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 040926.0 196.1 +/- 0.2 442.8 +/- 0.2 -32507.45 +/- 0.02 040927.0 196.0 +/- 0.1 441.0 +/- 0.1 -32508.01 +/- 0.03 040928.0 197.4 +/- 0.1 439.7 +/- 0.1 -32508.72 +/- 0.05 040929.0 197.9 +/- 0.1 436.5 +/- 0.1 -32509.62 +/- 0.06 040930.0 198.0 +/- 0.2 435.2 +/- 0.1 -32510.37 +/- 0.07 041001.0 197.4 +/- 0.1 431.6 +/- 0.1 -32511.00 +/- 0.07 041002.0 198.8 +/- 0.2 430.4 +/- 0.2 -32511.34 +/- 0.08 -------------------------------------------------------------- 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, 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 system 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 ******************************************************************************** |