| Date: | 2005-04-14 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 5208: Delft QL Report April 14, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-04-14 13:15:00 UTC Message No. 5208 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report April 14, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS April 14, 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, Apr 14, 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, Apr 14, 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) 050413 - 050413 - 1 1873 Simeiz, Crimea, Ukraine 050413 - 050413 - 1 1884 Riga, Latvia 050412 - 050412 - 2 6810 Zimmerwald 846, Switzerland 050413 - 050414 1 2 7080 McDonald Obs., Fort Davis, TX 050412 - 050413 2 2 7090 Yarragadee, Australia 050412 - 050413 4 4 7110 Monument Peak, California 050412 - 050413 - 2 7124 Papeete, Tahiti 050412 - 050412 1 - 7237 Changchun, China 050412 - 050412 2 3 7249 Beijing, China 050413 - 050413 - 1 7501 Hartebeesthoek, SA (MOB-6) 050413 - 050413 1 1 7810 Zimmerwald 423, Switzerland 050413 - 050414 1 2 7824 San Fernando, Spain 050413 - 050413 - 2 7825 Mount Stromlo, Australia 050412 - 050413 7 6 7832 Riyad, Saudi Arabia 050412 - 050413 2 5 7835 Grasse, France 050413 - 050413 - 2 7837 Shanghai Observatory, China 050412 - 050413 2 4 7838 Simosato Observatory, Japan 050413 - 050413 - 1 8834 Wettzell, Germany 050413 - 050414 2 3 ------ ------ --- --- TOTAL 050412 - 050414 25 44 ------------------------------------------------------------------------------ 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, Apr 6, 2005 to Thu, Apr 14, 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 19 24 Number of Passes 105/104 143/142 Number of Normal Points 1144/1139 1575/1563 Weighted RMS of Fit (mm) 13 13 ----------------------------------------------------------------------- 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 6 Apr 05 21:19 LAG1 11 0 27 19 +- 186 7 +- 139 14 1864 6 Apr 05 22:37 LAG2 10 0 23 20 +- 229 9 +- 166 16 1864 9 Apr 05 20:39 LAG1 7 0 39 -3 +- 331 23 +- 256 22 1864 9 Apr 05 21:01 LAG2 12 0 31 -20 +- 173 10 +- 166 20 1864 10 Apr 05 18:55 LAG2 12 0 14 -9 +- 187 -4 +- 142 12 1864 10 Apr 05 22:47 LAG1 12 0 36 30 +- 175 0 +- 92 19 1864 13 Apr 05 17:17 LAG2 12 0 22 -8 +- 183 -6 +- 155 18 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 9 Apr 05 21:08 LAG2 1 0 116 0 +- 0 0 +- 0 0 1873 10 Apr 05 19:14 LAG2 2 0 141 62 +-4145 37 +-1967 0 1873 10 Apr 05 23:25 LAG2 2 0 151 114 +-9705 17 +-4714 0 1873 12 Apr 05 01:36 LAG1 1 0 160 0 +- 0 0 +- 0 0 1873 13 Apr 05 21:09 LAG2 12 0 646 524 +- 174 91 +- 142 339*CHK* Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 6 Apr 05 18:27 LAG2 14 0 29 29 +- 83 -12 +- 77 3 1884 6 Apr 05 22:27 LAG2 10 0 15 6 +- 95 -8 +- 110 11 1884 10 Apr 05 22:49 LAG2 8 0 12 6 +- 107 -5 +- 57 6 1884 12 Apr 05 19:00 LAG2 16 0 24 15 +- 75 -14 +- 59 7 1884 12 Apr 05 22:59 LAG2 15 0 28 8 +- 84 -18 +- 66 8 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 13 Apr 05 20:49 LAG2 23 0 32 -33 +- 39 3 +- 21 4 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 6 Apr 05 03:23 LAG2 18 0 6 6 +- 16 -1 +- 10 2 7080 6 Apr 05 07:37 LAG2 17 0 6 3 +- 17 -4 +- 16 4 7080 6 Apr 05 12:17 LAG2 8 0 7 51 +- 231 -20 +- 101 2 7080 7 Apr 05 05:51 LAG2 5 0 10 2 +- 101 -13 +- 104 2 7080 7 Apr 05 08:35 LAG1 14 0 17 10 +- 18 11 +- 13 6 7080 7 Apr 05 09:59 LAG2 17 0 8 -2 +- 22 6 +- 16 4 7080 8 Apr 05 20:46 LAG1 4 0 13 -15 +- 425 0 +- 182 0 7080 11 Apr 05 14:27 LAG2 14 0 12 -8 +- 21 17 +- 25 2 7080 11 Apr 05 20:15 LAG1 9 0 6 -6 +- 23 -1 +- 11 2 7080 12 Apr 05 00:15 LAG2 5 0 33 32 +- 29 10 +- 90 5 7080 12 Apr 05 03:55 LAG2 12 0 11 1 +- 19 -4 +- 11 7 7080 12 Apr 05 08:36 LAG2 12 0 7 -8 +- 46 2 +- 30 4 7080 12 Apr 05 09:07 LAG1 11 0 7 3 +- 52 1 +- 25 3 7080 12 Apr 05 12:23 LAG2 9 0 23 -7 +- 22 10 +- 11 4 7080 12 Apr 05 12:37 LAG1 6 0 7 9 +- 96 -2 +- 66 1 7080 13 Apr 05 07:28 LAG1 17 0 15 2 +- 16 -11 +- 12 6 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 6 Apr 05 08:03 LAG1 15 0 9 5 +- 10 -4 +- 7 4 7090 6 Apr 05 09:59 LAG2 19 0 9 -2 +- 10 6 +- 6 2 7090 6 Apr 05 11:27 LAG1 11 0 13 -13 +- 12 -6 +- 17 1 7090 6 Apr 05 14:41 LAG1 10 0 5 6 +- 16 3 +- 17 1 7090 6 Apr 05 18:07 LAG1 18 0 19 -16 +- 10 8 +- 5 2 7090 7 Apr 05 06:43 LAG1 6 0 17 -12 +- 48 3 +- 33 1 7090 7 Apr 05 08:06 LAG2 17 0 4 2 +- 10 -2 +- 8 2 7090 7 Apr 05 10:09 LAG1 8 0 9 -6 +- 14 2 +- 13 5 7090 7 Apr 05 12:21 LAG2 13 0 13 1 +- 18 10 +- 17 1 7090 7 Apr 05 13:29 LAG1 6 0 13 -9 +- 17 13 +- 22 2 7090 7 Apr 05 16:35 LAG1 18 0 20 -3 +- 10 8 +- 4 1 7090 7 Apr 05 20:23 LAG1 6 0 3 -1 +- 32 -6 +- 50 1 7090 7 Apr 05 21:39 LAG2 16 0 15 16 +- 13 2 +- 13 2 7090 9 Apr 05 10:57 LAG1 13 0 4 -1 +- 12 5 +- 13 1 7090 9 Apr 05 12:31 LAG2 10 0 5 -1 +- 14 9 +- 26 1 7090 9 Apr 05 14:06 LAG1 6 0 9 -10 +- 56 -1 +- 44 1 7090 10 Apr 05 09:43 LAG1 7 0 7 7 +- 15 0 +- 28 2 7090 10 Apr 05 10:25 LAG2 25 0 9 5 +- 8 -5 +- 5 1 7090 10 Apr 05 13:01 LAG1 6 0 9 -9 +- 17 -2 +- 42 0 7090 10 Apr 05 16:03 LAG1 16 0 7 -4 +- 11 1 +- 6 2 7090 10 Apr 05 19:55 LAG1 13 0 8 -5 +- 17 -2 +- 15 1 7090 11 Apr 05 00:23 LAG2 4 0 8 5 +- 59 2 +- 90 3 7090 11 Apr 05 08:43 LAG2 18 0 5 -4 +- 12 0 +- 8 1 7090 11 Apr 05 11:49 LAG1 4 0 8 -10 +- 32 18 +- 52 4 7090 11 Apr 05 14:51 LAG1 13 0 14 -9 +- 12 -5 +- 7 3 7090 11 Apr 05 18:17 LAG1 16 0 10 -5 +- 11 4 +- 7 1 7090 11 Apr 05 22:04 LAG2 14 0 13 9 +- 17 15 +- 13 3 7090 12 Apr 05 06:37 LAG2 13 0 12 5 +- 14 15 +- 15 2 7090 12 Apr 05 07:01 LAG1 6 0 13 -3 +- 18 9 +- 15 1 7090 12 Apr 05 10:19 LAG1 13 0 18 19 +- 12 11 +- 12 2 7090 12 Apr 05 10:47 LAG2 18 0 6 7 +- 11 -1 +- 8 2 7090 12 Apr 05 13:51 LAG1 3 0 17 -19 +- 84 4 +- 152 0 7090 12 Apr 05 16:53 LAG1 21 0 19 -7 +- 9 10 +- 4 3 7090 13 Apr 05 00:39 LAG2 4 0 6 7 +- 64 -12 +- 62 1 7090 13 Apr 05 04:51 LAG2 2 0 35 -26 +- 37 127 +- 382 0 7090 13 Apr 05 08:47 LAG2 10 0 19 -15 +- 31 3 +- 21 3 7090 13 Apr 05 09:07 LAG1 14 0 12 3 +- 12 -10 +- 10 1 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 6 Apr 05 03:31 LAG2 15 0 2 0 +- 12 0 +- 8 2 7105 7 Apr 05 01:55 LAG2 5 0 6 0 +- 29 -11 +- 49 1 7105 12 Apr 05 00:15 LAG2 10 0 17 17 +- 13 0 +- 9 3 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 6 Apr 05 07:19 LAG2 11 1 11 8 +- 13 1 +- 12 6 7110 6 Apr 05 10:18 LAG1 4 0 11 -25 +- 88 18 +- 63 9 7110 6 Apr 05 11:39 LAG2 7 0 8 1 +- 16 -2 +- 9 7 7110 7 Apr 05 05:44 LAG2 7 0 18 -5 +- 44 -10 +- 34 3 7110 7 Apr 05 09:07 LAG1 3 0 10 10 +- 543 0 +- 250 0 7110 7 Apr 05 09:41 LAG2 15 0 5 0 +- 10 1 +- 8 4 7110 7 Apr 05 12:05 LAG1 10 0 13 12 +- 14 4 +- 8 4 7110 7 Apr 05 13:59 LAG2 11 0 12 13 +- 18 -1 +- 13 3 7110 7 Apr 05 18:55 LAG1 2 0 5 -12 +- 273 -6 +- 245 0 7110 8 Apr 05 21:03 LAG1 4 0 25 -18 +- 52 7 +- 56 0 7110 11 Apr 05 13:47 LAG1 11 0 18 -3 +- 13 -17 +- 14 3 7110 12 Apr 05 12:43 LAG2 10 0 6 -17 +- 47 7 +- 26 2 7110 13 Apr 05 06:15 LAG2 2 0 7 -2 +- 396 4 +- 328 0 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 12 Apr 05 13:17 LAG1 2 0 5 -19 +- 314 29 +- 373 0 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 6 Apr 05 17:33 LAG1 7 0 17 -15 +- 59 -2 +- 57 6 7237 6 Apr 05 19:17 LAG2 7 0 38 12 +- 173 -36 +- 127 4 7237 7 Apr 05 12:57 LAG2 14 0 20 16 +- 41 -10 +- 34 6 7237 8 Apr 05 15:19 LAG2 4 0 22 37 +- 144 -65 +- 265 9 7237 10 Apr 05 11:30 LAG2 12 0 31 0 +- 104 -17 +- 56 7 7237 10 Apr 05 19:09 LAG1 7 0 42 41 +- 57 -9 +- 47 5 7237 10 Apr 05 19:35 LAG2 8 0 27 22 +- 57 -25 +- 72 11 7237 11 Apr 05 13:16 LAG2 11 0 33 24 +- 46 -9 +- 23 6 7237 12 Apr 05 11:21 LAG2 12 0 13 -9 +- 85 -10 +- 53 9 7237 12 Apr 05 15:31 LAG2 17 0 24 10 +- 38 -16 +- 25 7 7237 12 Apr 05 16:17 LAG1 14 0 52 -51 +- 40 -8 +- 39 9 7237 12 Apr 05 19:47 LAG2 6 0 23 8 +- 63 -17 +- 51 8 7237 12 Apr 05 20:00 LAG1 6 0 37 32 +- 69 6 +- 58 9 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 9 Apr 05 17:27 LAG2 7 0 8 1 +- 118 -1 +- 96 8 7249 9 Apr 05 21:00 LAG1 1 0 4585 0 +- 0 0 +- 0 0 7249 13 Apr 05 18:05 LAG2 5 1 7 -76 +- 846 42 +- 468 1 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 6 Apr 05 12:13 LAG1 3 0 3 -2 +- 55 6 +- 126 3 7501 11 Apr 05 22:15 LAG1 14 0 28 21 +- 11 8 +- 7 4 7501 13 Apr 05 00:23 LAG1 15 0 4 -1 +- 11 0 +- 6 3 7501 13 Apr 05 04:07 LAG2 2 0 54 47 +- 87 17 +- 204 0 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 13 Apr 05 20:48 LAG2 21 0 23 -22 +- 40 4 +- 22 4 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 6 Apr 05 18:27 LAG2 5 0 26 20 +- 113 -15 +- 215 0 7811 11 Apr 05 20:50 LAG2 16 0 16 12 +- 45 6 +- 35 4 7811 12 Apr 05 01:01 LAG2 8 0 24 23 +- 67 3 +- 95 7 7811 12 Apr 05 01:17 LAG1 9 0 10 6 +- 86 -1 +- 75 8 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 7 Apr 05 20:33 LAG2 2 0 28 57 +-2077 -19 +-1366 0 7824 9 Apr 05 20:43 LAG2 9 0 26 48 +- 173 -11 +- 85 2 7824 10 Apr 05 00:39 LAG1 7 0 33 30 +- 48 19 +- 104 0 7824 10 Apr 05 00:55 LAG2 7 0 40 33 +- 204 3 +- 114 3 7824 11 Apr 05 03:21 LAG2 3 0 5 191 +-3044 -84 +-1357 2 7824 11 Apr 05 20:57 LAG2 6 0 28 31 +- 241 -2 +- 149 3 7824 12 Apr 05 01:03 LAG2 8 0 17 15 +- 108 1 +- 96 1 7824 12 Apr 05 01:39 LAG1 7 0 23 13 +- 182 5 +- 109 2 7824 13 Apr 05 02:59 LAG2 3 0 37 58 +-1033 12 +- 606 2 7824 13 Apr 05 21:13 LAG2 6 0 23 30 +- 300 -3 +- 164 0 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 6 Apr 05 01:51 LAG2 19 0 12 9 +- 9 -6 +- 9 3 7825 6 Apr 05 04:17 LAG1 20 0 7 -5 +- 9 -1 +- 5 3 7825 6 Apr 05 06:19 LAG2 15 0 7 3 +- 14 2 +- 9 2 7825 6 Apr 05 07:47 LAG1 18 0 3 0 +- 10 -2 +- 7 2 7825 6 Apr 05 10:11 LAG2 14 0 6 2 +- 11 7 +- 15 1 7825 6 Apr 05 11:09 LAG1 6 0 6 -6 +- 43 -10 +- 44 3 7825 6 Apr 05 14:23 LAG1 20 0 6 -1 +- 9 -1 +- 4 5 7825 6 Apr 05 19:59 LAG2 16 0 13 14 +- 11 -5 +- 12 2 7825 7 Apr 05 02:59 LAG1 5 0 3 -10 +- 72 -10 +- 64 0 7825 7 Apr 05 06:27 LAG1 16 0 13 12 +- 10 2 +- 7 4 7825 7 Apr 05 08:15 LAG2 18 0 4 0 +- 9 -1 +- 7 3 7825 7 Apr 05 13:15 LAG1 11 1 12 -1 +- 13 11 +- 13 4 7825 7 Apr 05 17:01 LAG1 3 0 16 -91 +- 164 81 +- 149 8 7825 8 Apr 05 06:19 LAG2 21 0 11 9 +- 9 3 +- 5 2 7825 8 Apr 05 08:35 LAG1 11 0 7 -7 +- 13 -5 +- 14 2 7825 8 Apr 05 11:59 LAG1 13 2 15 -12 +- 20 -2 +- 15 2 7825 8 Apr 05 15:11 LAG1 24 0 22 2 +- 8 -10 +- 4 8 7825 8 Apr 05 20:17 LAG2 15 0 5 -3 +- 15 -1 +- 13 2 7825 9 Apr 05 03:39 LAG1 15 0 14 -13 +- 12 -10 +- 8 3 7825 9 Apr 05 07:17 LAG1 17 0 6 5 +- 10 -3 +- 7 2 7825 9 Apr 05 08:31 LAG2 19 0 5 5 +- 10 -2 +- 7 1 7825 9 Apr 05 10:37 LAG1 13 0 17 16 +- 11 3 +- 12 1 7825 9 Apr 05 13:49 LAG1 23 0 10 3 +- 8 3 +- 4 5 7825 9 Apr 05 22:15 LAG2 3 0 5 22 +- 297 12 +- 208 2 7825 10 Apr 05 02:19 LAG2 3 0 8 -86 +- 635 -45 +- 359 5 7825 10 Apr 05 02:36 LAG1 7 0 4 2 +- 28 2 +- 32 2 7825 10 Apr 05 05:49 LAG1 18 0 6 -6 +- 10 0 +- 6 2 7825 10 Apr 05 06:35 LAG2 22 0 7 0 +- 9 4 +- 5 3 7825 10 Apr 05 09:21 LAG1 13 0 4 3 +- 11 0 +- 12 1 7825 10 Apr 05 12:33 LAG1 14 0 17 -9 +- 11 -9 +- 6 2 7825 11 Apr 05 00:18 LAG2 11 0 14 4 +- 15 -8 +- 12 4 7825 11 Apr 05 04:31 LAG1 5 0 16 -17 +- 20 -7 +- 13 1 7825 11 Apr 05 04:35 LAG2 20 0 11 -1 +- 9 -6 +- 6 4 7825 11 Apr 05 08:01 LAG1 16 0 9 -1 +- 10 -7 +- 8 1 7825 11 Apr 05 08:45 LAG2 6 0 6 12 +- 51 7 +- 50 1 7825 12 Apr 05 02:37 LAG2 14 0 4 4 +- 14 1 +- 14 1 7825 12 Apr 05 03:06 LAG1 10 0 14 -17 +- 19 -3 +- 14 2 7825 12 Apr 05 06:39 LAG1 11 0 11 14 +- 20 3 +- 14 2 7825 12 Apr 05 07:07 LAG2 10 0 4 2 +- 25 0 +- 15 3 7825 12 Apr 05 10:06 LAG1 3 0 19 17 +- 95 -1 +- 95 4 7825 13 Apr 05 00:35 LAG2 16 0 22 5 +- 12 -17 +- 11 4 7825 13 Apr 05 04:55 LAG2 15 0 5 -2 +- 11 -2 +- 10 3 7825 13 Apr 05 05:25 LAG1 13 0 5 -3 +- 11 -2 +- 9 1 7825 13 Apr 05 08:59 LAG1 8 0 21 -8 +- 27 -13 +- 26 2 7825 13 Apr 05 09:15 LAG2 8 0 9 -10 +- 44 2 +- 38 2 7825 13 Apr 05 12:01 LAG1 14 0 8 -4 +- 11 -3 +- 7 4 7825 13 Apr 05 15:25 LAG1 24 0 16 -15 +- 8 0 +- 4 5 7825 13 Apr 05 18:53 LAG2 11 0 14 -18 +- 16 20 +- 23 2 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 6 Apr 05 00:31 LAG2 11 0 14 17 +- 36 3 +- 31 2 7832 6 Apr 05 04:46 LAG2 10 0 30 30 +- 24 -2 +- 35 4 7832 6 Apr 05 18:19 LAG2 14 0 16 -9 +- 18 -9 +- 17 4 7832 9 Apr 05 16:27 LAG2 15 0 16 -11 +- 21 4 +- 15 4 7832 9 Apr 05 20:47 LAG2 12 0 14 -10 +- 19 13 +- 22 4 7832 10 Apr 05 00:23 LAG1 11 0 3 -2 +- 27 -1 +- 19 2 7832 10 Apr 05 00:59 LAG2 8 0 8 29 +- 89 18 +- 56 1 7832 10 Apr 05 14:41 LAG2 16 0 9 6 +- 16 -4 +- 14 4 7832 10 Apr 05 22:59 LAG1 6 0 15 -19 +- 169 -15 +- 77 3 7832 11 Apr 05 21:11 LAG2 11 0 11 -8 +- 24 21 +- 36 1 7832 11 Apr 05 21:43 LAG1 11 0 7 -5 +- 21 1 +- 21 4 7832 12 Apr 05 14:55 LAG2 6 0 21 12 +- 84 -7 +- 71 1 7832 12 Apr 05 18:59 LAG2 9 0 14 -15 +- 23 -9 +- 26 2 7832 12 Apr 05 20:31 LAG1 6 0 26 -31 +- 39 18 +- 84 7 7832 12 Apr 05 23:17 LAG2 11 0 6 -7 +- 34 -9 +- 32 2 7832 12 Apr 05 23:49 LAG1 12 0 24 12 +- 23 -9 +- 16 3 7832 13 Apr 05 03:35 LAG2 7 0 19 -15 +- 26 -15 +- 54 4 7832 13 Apr 05 16:57 LAG2 10 0 6 -8 +- 42 -3 +- 30 3 Station 7835 (Grasse) (position fixed, acc. 30 mm) 7835 6 Apr 05 22:01 LAG2 11 0 9 -8 +- 97 -9 +- 50 1 7835 7 Apr 05 00:57 LAG1 4 0 2 11 +- 427 7 +- 257 0 7835 13 Apr 05 02:57 LAG2 4 0 36 5 +- 611 -15 +- 292 2 7835 13 Apr 05 21:25 LAG2 3 0 9 -35 +- 981 13 +- 510 2 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 6 Apr 05 15:00 LAG2 10 0 11 6 +- 120 -7 +- 88 9 7837 6 Apr 05 17:33 LAG1 17 0 30 11 +- 37 15 +- 25 15 7837 6 Apr 05 19:07 LAG2 15 0 23 -1 +- 44 -15 +- 40 15 7837 10 Apr 05 11:25 LAG2 5 0 7 10 +- 234 -4 +- 197 5 7837 12 Apr 05 11:39 LAG2 7 0 25 -18 +- 191 -4 +- 123 7 7837 12 Apr 05 15:33 LAG2 8 0 19 12 +- 64 -11 +- 94 6 7837 12 Apr 05 16:31 LAG1 12 0 14 -13 +- 46 9 +- 48 5 7837 12 Apr 05 19:49 LAG2 6 0 10 0 +- 121 -11 +- 142 3 7837 12 Apr 05 20:03 LAG1 9 0 42 42 +- 51 2 +- 59 5 7837 13 Apr 05 13:37 LAG2 12 0 26 -6 +- 49 -21 +- 51 10 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 9 Apr 05 09:02 LAG2 21 0 12 8 +- 21 4 +- 15 6 7838 9 Apr 05 12:58 LAG2 27 0 54 50 +- 18 9 +- 11 5 7838 10 Apr 05 11:31 LAG2 6 0 50 48 +- 124 1 +- 92 4 7838 13 Apr 05 09:39 LAG2 14 0 56 42 +- 28 18 +- 23 6 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 6 Apr 05 00:07 LAG2 13 0 4 0 +- 11 2 +- 6 1 7839 6 Apr 05 02:15 LAG1 17 0 9 4 +- 10 -4 +- 5 3 7839 8 Apr 05 06:27 LAG1 18 0 8 4 +- 9 -3 +- 5 3 7839 8 Apr 05 10:14 LAG1 5 0 19 3 +- 48 -11 +- 24 0 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 6 Apr 05 18:25 LAG2 7 0 20 20 +- 25 -8 +- 56 1 7840 6 Apr 05 22:05 LAG2 14 0 6 5 +- 17 0 +- 9 2 7840 7 Apr 05 07:57 LAG1 12 0 9 0 +- 19 7 +- 15 2 7840 8 Apr 05 22:19 LAG2 13 0 8 -7 +- 18 -2 +- 10 2 7840 9 Apr 05 01:37 LAG1 19 0 12 9 +- 15 -1 +- 10 6 7840 9 Apr 05 02:27 LAG2 21 0 15 0 +- 14 -9 +- 9 3 7840 9 Apr 05 05:13 LAG1 15 0 6 5 +- 17 0 +- 9 2 7840 9 Apr 05 06:31 LAG2 13 0 10 -10 +- 18 -1 +- 22 1 7840 9 Apr 05 08:41 LAG1 14 0 6 -4 +- 17 2 +- 12 2 7840 9 Apr 05 12:07 LAG1 9 0 8 -6 +- 23 -2 +- 11 5 7840 10 Apr 05 03:53 LAG1 17 0 7 6 +- 16 0 +- 9 3 7840 10 Apr 05 04:33 LAG2 20 0 6 2 +- 14 3 +- 10 3 7840 10 Apr 05 19:03 LAG2 4 0 21 1 +- 216 -16 +- 158 1 7840 10 Apr 05 22:30 LAG2 15 0 11 -8 +- 18 -3 +- 12 2 7840 11 Apr 05 02:25 LAG1 16 0 16 0 +- 16 -7 +- 7 6 7840 11 Apr 05 02:47 LAG2 16 0 11 4 +- 18 -7 +- 11 2 7840 11 Apr 05 06:04 LAG1 16 0 12 9 +- 16 -6 +- 11 1 7840 11 Apr 05 06:51 LAG2 6 0 2 -2 +- 31 5 +- 80 0 7840 11 Apr 05 20:39 LAG2 11 0 25 -8 +- 20 10 +- 10 1 7840 12 Apr 05 04:39 LAG1 5 0 12 7 +- 29 4 +- 18 4 7840 12 Apr 05 04:51 LAG2 8 0 11 -6 +- 23 -8 +- 18 1 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 7 Apr 05 20:25 LAG2 8 2 9 -15 +- 44 -12 +- 38 7 7841 8 Apr 05 22:21 LAG2 11 1 8 -27 +- 49 -15 +- 25 3 7841 9 Apr 05 01:37 LAG1 12 1 9 10 +- 16 5 +- 10 4 7841 11 Apr 05 20:41 LAG2 17 0 12 -3 +- 10 5 +- 5 5 7841 12 Apr 05 01:02 LAG2 4 0 4 6 +- 33 13 +- 73 1 7841 12 Apr 05 04:33 LAG1 14 0 18 -1 +- 11 9 +- 6 5 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 6 Apr 05 22:17 LAG2 13 0 10 -9 +- 13 0 +- 8 3 7941 7 Apr 05 02:23 LAG2 16 0 10 1 +- 10 -6 +- 6 3 7941 8 Apr 05 00:39 LAG2 11 0 10 -4 +- 16 12 +- 16 1 7941 11 Apr 05 16:59 LAG2 6 0 12 10 +- 21 5 +- 46 2 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 6 Apr 05 13:01 LAG1 2 0 18 -230 +- 549 239 +- 608 0 8834 11 Apr 05 06:03 LAG1 15 0 15 -13 +- 11 -2 +- 7 3 8834 11 Apr 05 06:43 LAG2 11 0 7 -5 +- 13 3 +- 20 3 8834 11 Apr 05 17:07 LAG2 1 0 8 0 +- 0 0 +- 0 0 8834 12 Apr 05 08:05 LAG1 12 0 21 -9 +- 12 12 +- 9 6 8834 13 Apr 05 21:13 LAG2 10 0 28 -35 +- 18 11 +- 11 7 -------------------------------------------------------------------------------- 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 - 050404 0/ 24/ 0 0/ 31/ 0 55 1831 LVIL 040815 - 050404 0/ 27/ 0 0/ 37/ 0 64 1864 MD2LAS 040701 - 050413 0/ 95/ 0 0/ 87/ 0 182 1873 SIMLAS 040703 - 050413 0/ 26/ 0 0/ 21/ 0 47 1884 RIGLAS 040712 - 050412 0/ 46/ 1 0/ 41/ 2 90 1893 CRMLAS 040705 - 041012 0/ 45/ 0 0/ 35/ 0 80 6405 TIGO 040710 - 050323 10/ 13/ 1 7/ 19/ 1 51 6810 ZIMLAT 040805 - 050414 188/117/ 21 111/110/ 19 566 7080 MLRS25 040701 - 050413 65/ 68/ 5 59/ 89/ 7 293 7090 ML0514 040716 - 050413 147/431/ 38 132/271/ 32 1051 7105 ML0725 040701 - 050412 0/ 87/ 4 2/115/ 7 215 7110 ML0414 040701 - 050413 83/138/ 18 81/151/ 21 492 7124 ML0819 040705 - 050412 0/ 35/ 0 0/ 14/ 0 49 7231 WUHA01 040701 - 041208 0/ 8/ 0 0/ 20/ 0 28 7237 CHALAS 040702 - 050412 0/160/ 1 0/185/ 1 347 7249 BEJLAS 040701 - 050413 0/108/ 0 0/135/ 0 243 7308 CRLLAS 041201 - 050307 9/ 11/ 2 3/ 15/ 0 40 7355 TROS02 040702 - 040829 0/ 37/ 0 0/ 29/ 0 66 7405 TIGO 040710 - 050320 6/ 28/ 0 3/ 10/ 0 47 7501 ML0616 040701 - 050413 23/ 47/ 4 58/ 82/ 7 221 7604 BREF 041017 - 041021 0/ 1/ 0 0/ 2/ 0 3 7806 METLAS 040720 - 050301 0/ 16/ 0 0/ 11/ 0 27 7810 ZIMLAT 040701 - 050414 242/143/ 27 136/129/ 23 700 7811 POLLAS 040706 - 050412 0/ 58/ 0 0/ 76/ 0 134 7824 SPNLAS 040701 - 050413 0/108/ 0 0/107/ 0 215 7825 STL3 040807 - 050413 164/252/ 39 162/160/ 27 804 7832 SALRO 040702 - 050413 148/239/ 19 195/289/ 27 917 7835 GRASSE 040702 - 050413 0/ 50/ 2 0/ 45/ 2 99 7836 GFZLAS 040701 - 040701 0/ 1/ 0 0/ 0/ 0 1 7837 CHILAS 040704 - 050413 0/104/ 0 0/150/ 2 256 7838 SHOLAS 040701 - 050413 68/123/ 4 80/160/ 9 444 7839 AUSLAS 040701 - 050408 210/180/ 30 95/179/ 24 718 7840 RGOLAS 040701 - 050412 153/114/ 25 86/119/ 18 515 7841 GFZLA3 040702 - 050412 57/ 71/ 17 28/ 92/ 12 277 7845 GRASLL 040705 - 040920 11/ 14/ 0 3/ 12/ 1 41 7941 MLROnn 040701 - 050411 94/ 69/ 10 81/ 88/ 7 349 8834 WLRS01 040701 - 050414 240/151/ 30 142/169/ 23 755 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050407.0 -35.8 +/- 0.1 248.5 +/- 0.1 -32635.49 +/- 0.01 050408.0 -37.6 +/- 0.1 249.6 +/- 0.1 -32636.89 +/- 0.02 050409.0 -39.0 +/- 0.1 252.7 +/- 0.1 -32638.28 +/- 0.03 050410.0 -41.3 +/- 0.1 254.2 +/- 0.1 -32639.40 +/- 0.04 050411.0 -43.6 +/- 0.1 255.5 +/- 0.1 -32640.19 +/- 0.05 050412.0 -44.6 +/- 0.1 256.8 +/- 0.1 -32640.62 +/- 0.05 050413.0 -46.4 +/- 0.1 258.1 +/- 0.1 -32640.91 +/- 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 ******************************************************************************** |