| Date: | 2005-08-26 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 5882: Delft QL Report August 26, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-08-26 13:15:00 UTC Message No. 5882 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report August 26, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS August 26, 2005 This is a daily report, presenting the results of a continuing analysis of the most recent global LAGEOS-1 and LAGEOS-2 quick-look laser ranging data. The report consists of (A) a pass summary, (B) an overview of the analysis results, detailed statistics of the analysed measurements, and an accumulative pass overview and (C) the earth rotation parameter solutions submitted to IERS. The report is based on all quick-look data as received until Fri, Aug 26, 2005. Questions and comments should be addressed to: R. Noomen Delft University of Technology Faculty of Aerospace Engineering Delft Institute for Earth-Oriented Space Research Kluyverweg 1 2629 HS Delft The Netherlands Telephone: +31-15-2785377 Telefax : +31-15-2785322 E-mail : ron.noomen@deos.tudelft.nl A. PASS SUMMARY The table below gives an overview of the ranging data both on LAGEOS-1 and LAGEOS-2, as received by the Quick-Look Data Analysis Center (QLDAC) on Fri, Aug 26, 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 ------------------------------------------------------------------------------ 1831 Lviv, Ukraine 050820 - 050821 2 - 1864 Maidanak, Uzbekistan (site 2) 050819 - 050824 6 - 1873 Simeiz, Crimea, Ukraine 050821 - 050825 8 - 1884 Riga, Latvia 050820 - 050825 7 - 6810 Zimmerwald 846, Switzerland 050824 - 050824 3 2 7090 Yarragadee, Australia 050824 - 050825 2 3 7105 Greenbelt, Maryland 050824 - 050825 3 2 7110 Monument Peak, California 050824 - 050825 5 1 7124 Papeete, Tahiti 050824 - 050824 - 1 7231 Wuhan, China (new) 050825 - 050825 1 - 7249 Beijing, China 050820 - 050820 2 - 7355 Urumqi, China (TROS) 050821 - 050821 3 - 7501 Hartebeesthoek, SA (MOB-6) 050824 - 050825 1 3 7810 Zimmerwald 423, Switzerland 050823 - 050824 3 3 7824 San Fernando, Spain 050822 - 050825 5 - 7825 Mount Stromlo, Australia 050820 - 050825 20 18 7832 Riyad, Saudi Arabia 050820 - 050824 15 8 7839 Graz, Austria 050823 - 050825 3 3 7840 Herstmonceux, United Kingdom 050821 - 050826 11 7 7841 Potsdam, Germany 050822 - 050825 3 - 7848 Ajaccio, Corsica (FTLRS) 050823 - 050823 1 1 7941 Matera, Italy (MLRO 532) 050821 - 050826 6 9 8834 Wettzell, Germany 050821 - 050825 2 2 ------ ------ --- --- TOTAL 050819 - 050826 112 63 ------------------------------------------------------------------------------ B. ANALYSIS RESULTS The analysis is based on two orbit solutions using global quick-look normal points that cover a period of 8 days which are computed simultaneously. This week´s data interval runs from Thu, Aug 18, 2005 to Fri, Aug 26, 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 27 18 Number of Passes 221/218 142/141 Number of Normal Points 2298/2257 1747/1724 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 1831 (Lviv) (position fixed, acc. 400 mm) 1831 20 Aug 05 19:16 LAG1 7 0 35 41 +- 578 22 +- 665 13 1831 20 Aug 05 22:57 LAG1 6 0 247 -247 +- 883 0 +- 701 11 1831 21 Aug 05 21:33 LAG1 7 0 150 -147 +- 552 -4 +- 636 9 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 18 Aug 05 18:18 LAG1 8 0 28 -24 +- 212 1 +- 141 14 1864 19 Aug 05 17:00 LAG1 3 0 88 -79 +-2983 0 +-1812 37 1864 20 Aug 05 15:45 LAG1 7 0 15 1 +- 286 -8 +- 213 12 1864 20 Aug 05 19:08 LAG1 7 0 34 -17 +- 284 -34 +- 295 22 1864 21 Aug 05 17:55 LAG1 3 0 19 -17 +- 628 4 +-1264 1 1864 22 Aug 05 16:22 LAG1 7 0 133 21 +- 308 21 +- 201 131 1864 24 Aug 05 17:11 LAG1 11 0 19 4 +- 181 -5 +- 108 15 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 21 Aug 05 21:38 LAG1 7 0 148 256 +- 680 -71 +- 400 17 1873 22 Aug 05 00:57 LAG1 5 0 205 215 +- 413 -25 +- 653 29 1873 22 Aug 05 20:05 LAG1 9 0 224 223 +- 207 19 +- 214 47 1873 22 Aug 05 23:37 LAG1 5 0 148 150 +- 289 -8 +- 634 6 1873 23 Aug 05 18:51 LAG1 7 0 155 241 +- 494 -54 +- 251 18 1873 23 Aug 05 22:11 LAG1 6 0 144 141 +- 333 6 +- 393 40 1873 25 Aug 05 19:23 LAG1 12 0 205 200 +- 173 0 +- 82 45 1873 25 Aug 05 23:11 LAG1 6 0 145 267 +- 762 -87 +- 485 11 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 18 Aug 05 22:01 LAG1 11 0 15 12 +- 101 3 +- 81 1 1884 19 Aug 05 01:33 LAG1 11 0 12 4 +- 132 5 +- 89 4 1884 19 Aug 05 20:44 LAG1 10 0 21 -10 +- 180 18 +- 109 3 1884 20 Aug 05 00:03 LAG1 16 0 17 8 +- 76 7 +- 49 7 1884 20 Aug 05 22:54 LAG1 10 0 12 1 +- 184 6 +- 109 3 1884 22 Aug 05 19:53 LAG1 14 0 27 23 +- 80 -6 +- 39 6 1884 22 Aug 05 23:31 LAG1 13 0 24 21 +- 83 7 +- 64 5 1884 23 Aug 05 18:43 LAG1 10 0 27 28 +- 123 -1 +- 111 3 1884 23 Aug 05 22:07 LAG1 11 0 8 8 +- 110 3 +- 83 4 1884 25 Aug 05 00:19 LAG1 13 0 14 2 +- 85 10 +- 65 2 1884 25 Aug 05 22:53 LAG1 16 0 9 -6 +- 75 3 +- 49 3 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 18 Aug 05 02:43 LAG1 13 0 9 1 +- 50 3 +- 31 7 6810 18 Aug 05 05:08 LAG2 23 0 11 -6 +- 39 -3 +- 24 5 6810 18 Aug 05 06:02 LAG1 26 0 14 -10 +- 35 -3 +- 16 5 6810 18 Aug 05 09:07 LAG2 18 0 19 -11 +- 43 -8 +- 25 3 6810 18 Aug 05 10:00 LAG1 11 0 8 8 +- 63 -12 +- 96 2 6810 19 Aug 05 04:43 LAG1 25 0 36 -24 +- 36 -12 +- 17 3 6810 19 Aug 05 07:18 LAG2 19 0 12 -4 +- 44 7 +- 26 2 6810 19 Aug 05 08:17 LAG1 23 0 29 2 +- 38 -18 +- 24 3 6810 24 Aug 05 08:32 LAG1 9 0 26 -27 +- 89 0 +- 63 3 6810 24 Aug 05 09:47 LAG2 9 0 84 -45 +- 61 28 +- 41 62 6810 24 Aug 05 14:05 LAG2 12 0 48 -5 +- 66 -26 +- 38 3 6810 24 Aug 05 17:19 LAG1 3 0 12 -11 +- 107 0 +- 111 1 6810 24 Aug 05 20:51 LAG1 15 0 11 -10 +- 47 1 +- 27 3 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 19 Aug 05 02:06 LAG1 7 0 33 28 +- 25 -7 +- 15 10 7080 19 Aug 05 05:51 LAG1 12 0 24 7 +- 32 -17 +- 20 5 7080 19 Aug 05 10:45 LAG2 8 0 18 5 +- 23 26 +- 38 2 7080 19 Aug 05 12:39 LAG1 3 0 4 -17 +- 288 12 +- 185 2 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 18 Aug 05 10:39 LAG2 24 0 13 -8 +- 9 -4 +- 6 2 7090 18 Aug 05 11:29 LAG1 24 0 20 -13 +- 8 6 +- 4 5 7090 18 Aug 05 14:59 LAG2 13 0 7 5 +- 12 -8 +- 13 1 7090 18 Aug 05 18:59 LAG2 21 0 10 10 +- 9 0 +- 4 3 7090 19 Aug 05 00:21 LAG1 5 0 9 -13 +- 29 -9 +- 41 1 7090 19 Aug 05 08:42 LAG2 11 1 38 -22 +- 13 23 +- 8 7 7090 19 Aug 05 10:14 LAG1 19 0 21 -18 +- 9 5 +- 5 3 7090 19 Aug 05 12:55 LAG2 18 0 18 0 +- 11 15 +- 9 1 7090 19 Aug 05 14:17 LAG1 6 0 34 -11 +- 152 25 +- 81 0 7090 19 Aug 05 17:01 LAG2 25 0 15 10 +- 8 7 +- 5 3 7090 19 Aug 05 21:09 LAG2 23 0 12 10 +- 8 -5 +- 7 3 7090 20 Aug 05 09:07 LAG1 10 0 12 10 +- 14 2 +- 16 4 7090 20 Aug 05 10:49 LAG2 26 0 19 -10 +- 8 -7 +- 5 2 7090 20 Aug 05 12:17 LAG1 15 0 11 -10 +- 11 1 +- 5 6 7090 20 Aug 05 15:01 LAG2 18 0 10 4 +- 9 -5 +- 7 5 7090 20 Aug 05 19:13 LAG2 19 0 5 4 +- 9 -1 +- 5 2 7090 21 Aug 05 09:19 LAG2 8 0 10 -28 +- 58 20 +- 34 2 7090 21 Aug 05 10:59 LAG1 25 0 28 -11 +- 8 -11 +- 4 4 7090 21 Aug 05 13:03 LAG2 18 0 19 -8 +- 9 14 +- 8 4 7090 21 Aug 05 21:27 LAG2 19 0 7 6 +- 9 3 +- 10 2 7090 21 Aug 05 23:49 LAG1 9 0 14 -15 +- 15 6 +- 18 1 7090 22 Aug 05 09:41 LAG1 14 0 14 11 +- 12 9 +- 8 3 7090 22 Aug 05 11:01 LAG2 15 0 16 -7 +- 10 -8 +- 6 3 7090 22 Aug 05 13:25 LAG1 12 0 7 -8 +- 18 6 +- 11 1 7090 22 Aug 05 15:53 LAG2 5 0 24 -24 +- 118 0 +- 90 4 7090 22 Aug 05 19:49 LAG2 13 0 9 4 +- 23 -7 +- 13 2 7090 23 Aug 05 09:09 LAG2 8 0 27 -34 +- 40 -6 +- 29 3 7090 24 Aug 05 11:15 LAG2 19 0 18 2 +- 9 -13 +- 7 2 7090 24 Aug 05 14:19 LAG1 10 0 12 -19 +- 26 8 +- 25 3 7090 24 Aug 05 15:33 LAG2 6 0 5 -17 +- 168 -7 +- 101 0 7090 25 Aug 05 09:29 LAG1 6 0 4 1 +- 35 1 +- 22 2 7090 25 Aug 05 09:45 LAG2 9 0 7 -11 +- 50 10 +- 30 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 18 Aug 05 00:00 LAG1 1 0 20 0 +- 0 0 +- 0 0 7105 18 Aug 05 06:47 LAG1 8 0 3 1 +- 15 -1 +- 14 2 7105 18 Aug 05 08:40 LAG2 22 0 6 -6 +- 9 2 +- 7 2 7105 18 Aug 05 10:05 LAG1 14 0 11 -8 +- 12 -2 +- 8 5 7105 22 Aug 05 01:29 LAG1 17 0 16 10 +- 12 4 +- 7 2 7105 22 Aug 05 04:49 LAG1 17 0 11 10 +- 10 3 +- 7 3 7105 22 Aug 05 08:10 LAG1 21 0 11 6 +- 9 -1 +- 5 10 7105 22 Aug 05 09:11 LAG2 11 0 6 6 +- 14 0 +- 16 1 7105 22 Aug 05 11:41 LAG1 8 0 9 -4 +- 14 0 +- 7 8 7105 23 Aug 05 10:11 LAG1 21 0 14 -9 +- 9 -5 +- 5 2 7105 23 Aug 05 11:19 LAG2 16 0 8 7 +- 11 0 +- 7 4 7105 24 Aug 05 05:43 LAG1 4 0 8 22 +- 78 15 +- 75 1 7105 24 Aug 05 08:57 LAG1 12 0 16 -5 +- 14 10 +- 12 2 7105 24 Aug 05 09:22 LAG2 18 0 13 -7 +- 10 -7 +- 7 3 7105 25 Aug 05 04:11 LAG1 24 0 7 4 +- 8 -1 +- 4 4 7105 25 Aug 05 07:25 LAG2 19 0 11 -5 +- 10 7 +- 9 2 7105 25 Aug 05 08:01 LAG1 5 0 4 12 +- 86 -10 +- 59 0 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 18 Aug 05 04:07 LAG1 2 0 5 379 +-3524 -143 +-1322 0 7110 18 Aug 05 07:07 LAG1 12 0 17 15 +- 13 -10 +- 8 2 7110 18 Aug 05 10:31 LAG1 4 0 5 4 +- 23 11 +- 86 4 7110 18 Aug 05 12:19 LAG2 8 0 10 -13 +- 21 -5 +- 13 3 7110 18 Aug 05 13:43 LAG1 15 0 13 -12 +- 10 3 +- 7 2 7110 18 Aug 05 16:55 LAG2 4 0 30 29 +- 137 -45 +- 106 1 7110 18 Aug 05 20:51 LAG2 4 0 15 -19 +- 107 -3 +- 92 1 7110 19 Aug 05 02:35 LAG1 2 0 5 43 +- 665 -25 +- 444 0 7110 19 Aug 05 05:45 LAG1 3 0 31 18 +- 232 -8 +- 147 0 7110 19 Aug 05 09:11 LAG1 9 0 8 2 +- 14 -10 +- 20 2 7110 19 Aug 05 10:49 LAG2 8 0 14 -4 +- 23 25 +- 34 4 7110 19 Aug 05 12:39 LAG1 5 0 6 -3 +- 54 -2 +- 53 3 7110 19 Aug 05 14:55 LAG2 8 0 5 14 +- 59 -6 +- 34 1 7110 19 Aug 05 22:57 LAG2 5 0 4 5 +- 84 2 +- 59 4 7110 20 Aug 05 04:13 LAG1 11 0 14 13 +- 12 0 +- 6 5 7110 20 Aug 05 12:53 LAG2 7 0 10 2 +- 24 -15 +- 29 1 7110 20 Aug 05 14:39 LAG1 3 0 9 5 +- 55 -7 +- 111 2 7110 22 Aug 05 12:05 LAG1 5 0 2 -4 +- 40 5 +- 49 0 7110 23 Aug 05 03:57 LAG1 10 0 14 15 +- 18 -15 +- 14 2 7110 23 Aug 05 10:41 LAG1 8 0 10 8 +- 15 -7 +- 21 5 7110 23 Aug 05 11:21 LAG2 6 0 14 21 +- 60 -7 +- 51 2 7110 23 Aug 05 14:05 LAG1 6 0 10 4 +- 29 -7 +- 16 2 7110 24 Aug 05 05:55 LAG1 3 0 3 11 +- 266 7 +- 131 1 7110 24 Aug 05 09:25 LAG1 3 0 7 0 +- 69 16 +- 128 0 7110 24 Aug 05 12:41 LAG1 3 0 17 -42 +- 168 -22 +- 151 1 7110 24 Aug 05 13:17 LAG2 3 0 13 -19 +- 79 -70 +- 186 2 7110 24 Aug 05 16:25 LAG1 6 1 8 1 +- 82 -7 +- 56 2 7110 25 Aug 05 04:27 LAG1 14 0 13 8 +- 16 -3 +- 9 1 7110 25 Aug 05 08:01 LAG1 8 0 12 9 +- 14 -2 +- 12 7 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 18 Aug 05 03:01 LAG2 8 0 16 33 +- 31 19 +- 26 1 7124 18 Aug 05 04:17 LAG1 14 0 38 52 +- 15 -26 +- 10 3 7124 19 Aug 05 09:36 LAG2 4 0 68 -57 +- 226 9 +- 196 3 7124 19 Aug 05 19:13 LAG1 9 0 17 21 +- 18 -13 +- 14 4 7124 20 Aug 05 07:39 LAG2 9 0 10 -10 +- 14 5 +- 43 2 7124 21 Aug 05 07:31 LAG1 6 0 71 21 +- 147 -43 +- 68 2 7124 22 Aug 05 03:27 LAG2 23 0 20 15 +- 9 5 +- 6 2 7124 22 Aug 05 07:47 LAG2 3 0 26 -26 +- 377 0 +- 401 2 7124 24 Aug 05 06:37 LAG1 17 0 9 5 +- 13 -7 +- 7 2 7124 24 Aug 05 08:17 LAG2 10 0 4 -3 +- 15 7 +- 38 2 7124 24 Aug 05 12:13 LAG2 22 0 29 22 +- 9 -7 +- 4 7 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 25 Aug 05 12:15 LAG1 11 0 17302-11970 +- 46 12867 +- 44 281*CHK* Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 18 Aug 05 14:35 LAG1 15 0 18 13 +- 39 -6 +- 24 8 7249 18 Aug 05 18:11 LAG1 8 0 9 5 +- 82 -11 +- 87 5 7249 18 Aug 05 19:49 LAG2 11 0 24 -12 +- 47 -4 +- 48 21 7249 19 Aug 05 13:15 LAG1 16 0 13 10 +- 40 -6 +- 24 6 7249 19 Aug 05 16:47 LAG1 9 0 26 -25 +- 52 1 +- 45 6 7249 19 Aug 05 20:21 LAG1 4 0 16 11 +- 368 -22 +- 298 2 7249 20 Aug 05 12:14 LAG1 3 0 16 13 +- 762 -16 +- 425 0 7249 20 Aug 05 15:39 LAG1 4 0 23 -50 +- 245 56 +- 215 6 Station 7355 (Urumqi) (position solved, acc. 10 mm) 7355 21 Aug 05 14:26 LAG1 5 2 68 -411 +- 157 252 +- 104 6*CHK* 7355 21 Aug 05 17:43 LAG1 13 1 168 38 +- 13 -101 +- 10 122 7355 21 Aug 05 21:11 LAG1 4 0 524 -515 +- 21 -178 +- 64 5*CHK* Station 7358 (Tanegashima) (position solved, acc. 10 mm) 7358 21 Aug 05 14:05 LAG1 5 0 1 0 +- 45 0 +- 43 1 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 18 Aug 05 19:29 LAG1 2 0 25 -29 +-1168 30 +- 653 0 7501 18 Aug 05 22:51 LAG2 7 0 17 6 +- 19 31 +- 50 1 7501 19 Aug 05 03:03 LAG2 7 0 42 3 +- 52 32 +- 43 1 7501 19 Aug 05 20:27 LAG2 17 0 16 18 +- 12 6 +- 14 3 7501 20 Aug 05 16:23 LAG1 10 0 11 14 +- 17 -3 +- 8 1 7501 20 Aug 05 18:23 LAG2 10 0 20 29 +- 22 11 +- 20 1 7501 20 Aug 05 19:53 LAG1 6 0 15 15 +- 17 2 +- 16 2 7501 21 Aug 05 16:56 LAG2 3 0 29 -16 +- 335 28 +- 210 0 7501 21 Aug 05 18:51 LAG1 7 0 24 18 +- 82 2 +- 40 0 7501 21 Aug 05 20:45 LAG2 13 0 17 18 +- 12 10 +- 13 3 7501 22 Aug 05 01:01 LAG2 5 0 22 -15 +- 140 4 +- 82 1 7501 22 Aug 05 07:07 LAG1 8 0 11 -1 +- 29 7 +- 21 2 7501 23 Aug 05 16:07 LAG1 8 0 6 3 +- 62 -4 +- 31 2 7501 23 Aug 05 19:25 LAG1 8 0 7 -2 +- 18 -3 +- 12 2 7501 23 Aug 05 21:09 LAG2 14 0 15 8 +- 11 12 +- 12 2 7501 24 Aug 05 08:21 LAG1 3 0 22 158 +- 478 -63 +- 221 7 7501 24 Aug 05 19:00 LAG2 8 0 30 -18 +- 15 21 +- 17 2 7501 24 Aug 05 23:21 LAG2 6 0 6 11 +- 76 4 +- 56 2 7501 25 Aug 05 03:25 LAG2 4 0 12 -9 +- 111 3 +- 124 0 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 18 Aug 05 02:43 LAG1 13 0 10 -4 +- 50 4 +- 31 5 7810 18 Aug 05 05:03 LAG2 23 0 13 -10 +- 38 -4 +- 23 3 7810 18 Aug 05 06:11 LAG1 21 0 18 -15 +- 41 -3 +- 20 4 7810 18 Aug 05 09:07 LAG2 16 0 19 -14 +- 45 -8 +- 28 2 7810 18 Aug 05 09:56 LAG1 12 0 7 2 +- 60 -9 +- 79 3 7810 19 Aug 05 04:44 LAG1 24 0 36 -21 +- 37 -14 +- 18 2 7810 19 Aug 05 07:19 LAG2 21 0 10 -6 +- 42 6 +- 25 2 7810 19 Aug 05 08:17 LAG1 22 0 28 -1 +- 40 -18 +- 26 3 7810 23 Aug 05 16:25 LAG2 2 0 35 -175 +-5216 76 +-2858 0 7810 24 Aug 05 08:33 LAG1 7 0 23 20 +- 198 22 +- 110 5 7810 24 Aug 05 10:04 LAG2 10 0 40 -20 +- 92 -11 +- 55 14 7810 24 Aug 05 14:05 LAG2 11 0 44 -5 +- 66 -24 +- 39 3 7810 24 Aug 05 17:19 LAG1 3 0 13 -13 +- 107 0 +- 110 0 7810 24 Aug 05 20:51 LAG1 16 0 16 -15 +- 45 0 +- 25 2 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 18 Aug 05 21:57 LAG1 16 0 14 13 +- 45 -3 +- 29 5 7811 19 Aug 05 01:33 LAG1 10 0 9 9 +- 68 -1 +- 61 5 7811 19 Aug 05 20:45 LAG1 10 0 16 9 +- 75 3 +- 58 9 7811 20 Aug 05 00:04 LAG1 14 0 21 16 +- 49 10 +- 36 6 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 18 Aug 05 22:09 LAG1 4 0 90 258 +- 574 83 +- 277 11 7824 20 Aug 05 19:45 LAG1 7 0 46 89 +- 177 -29 +- 109 1 7824 22 Aug 05 20:20 LAG1 7 0 68 70 +- 48 -14 +- 36 6 7824 23 Aug 05 00:01 LAG1 8 0 66 78 +- 123 -8 +- 75 3 7824 23 Aug 05 22:29 LAG1 13 0 77 75 +- 37 1 +- 24 7 7824 25 Aug 05 19:45 LAG1 14 0 64 69 +- 39 -8 +- 27 5 7824 25 Aug 05 23:11 LAG1 12 0 85 83 +- 38 2 +- 25 8 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 18 Aug 05 01:27 LAG1 15 0 19 -19 +- 12 1 +- 8 3 7825 18 Aug 05 04:46 LAG1 10 1 13 -5 +- 14 -15 +- 20 4 7825 18 Aug 05 07:05 LAG2 15 0 14 6 +- 20 3 +- 13 8 7825 18 Aug 05 08:03 LAG1 10 0 21 -3 +- 19 -16 +- 14 10 7825 18 Aug 05 10:49 LAG2 20 0 9 1 +- 10 -6 +- 8 5 7825 18 Aug 05 11:37 LAG1 8 0 9 5 +- 17 3 +- 11 2 7825 18 Aug 05 15:01 LAG2 13 0 7 0 +- 12 -3 +- 5 2 7825 18 Aug 05 19:22 LAG2 7 3 37 33 +- 21 -19 +- 43 13 7825 20 Aug 05 08:44 LAG1 14 1 7 5 +- 13 0 +- 7 4 7825 20 Aug 05 11:02 LAG2 21 0 15 2 +- 9 -10 +- 6 3 7825 20 Aug 05 15:15 LAG2 18 0 12 4 +- 9 -5 +- 5 5 7825 20 Aug 05 19:33 LAG2 4 0 11 10 +- 22 6 +- 28 5 7825 21 Aug 05 23:45 LAG1 11 2 17 1 +- 48 6 +- 22 7 7825 22 Aug 05 02:53 LAG1 10 0 7 3 +- 14 -4 +- 13 5 7825 22 Aug 05 06:15 LAG1 3 0 17 -22 +- 204 -30 +- 159 0 7825 22 Aug 05 07:09 LAG2 24 0 8 1 +- 8 2 +- 4 6 7825 22 Aug 05 09:35 LAG1 20 0 16 -7 +- 9 7 +- 5 7 7825 22 Aug 05 11:33 LAG2 16 0 32 -10 +- 12 -18 +- 9 14 7825 22 Aug 05 15:29 LAG2 23 0 22 0 +- 8 -11 +- 4 3 7825 22 Aug 05 19:49 LAG2 5 0 20 24 +- 25 35 +- 99 4 7825 22 Aug 05 22:11 LAG1 15 0 9 7 +- 11 1 +- 8 2 7825 23 Aug 05 01:35 LAG1 14 1 7 0 +- 11 3 +- 10 6 7825 23 Aug 05 05:09 LAG1 4 0 38 77 +- 53 -84 +- 90 12 7825 23 Aug 05 05:34 LAG2 14 1 6 -1 +- 17 3 +- 14 6 7825 23 Aug 05 08:11 LAG1 23 0 24 -5 +- 8 -11 +- 4 6 7825 23 Aug 05 09:19 LAG2 20 0 11 -10 +- 9 0 +- 5 4 7825 23 Aug 05 11:57 LAG1 13 0 9 0 +- 12 -11 +- 15 2 7825 23 Aug 05 13:33 LAG2 25 0 19 -10 +- 8 10 +- 5 5 7825 23 Aug 05 17:41 LAG2 20 0 25 -9 +- 9 15 +- 7 3 7825 23 Aug 05 20:39 LAG1 11 0 10 2 +- 15 -7 +- 12 2 7825 24 Aug 05 00:08 LAG1 18 0 8 -7 +- 9 0 +- 5 3 7825 24 Aug 05 03:53 LAG1 7 0 11 9 +- 36 0 +- 35 5 7825 24 Aug 05 07:01 LAG1 14 0 21 20 +- 11 2 +- 9 3 7825 24 Aug 05 07:27 LAG2 21 0 8 6 +- 9 -1 +- 6 4 7825 24 Aug 05 10:23 LAG1 18 0 23 -6 +- 9 13 +- 5 2 7825 24 Aug 05 11:33 LAG2 16 0 21 -7 +- 12 -17 +- 9 2 7825 24 Aug 05 15:43 LAG2 22 0 7 0 +- 8 -3 +- 4 1 7825 24 Aug 05 22:47 LAG1 20 1 16 8 +- 9 6 +- 4 6 7825 25 Aug 05 02:21 LAG1 12 1 13 -2 +- 15 7 +- 15 11 7825 25 Aug 05 05:33 LAG2 14 0 10 7 +- 11 2 +- 6 5 7825 25 Aug 05 06:01 LAG1 4 0 3 1 +- 134 1 +- 89 1 7825 25 Aug 05 09:09 LAG1 18 0 8 -1 +- 11 -3 +- 6 3 7825 25 Aug 05 09:43 LAG2 22 0 6 1 +- 9 3 +- 7 3 7825 25 Aug 05 13:51 LAG2 27 0 2 0 +- 8 0 +- 5 2 7825 25 Aug 05 17:55 LAG2 16 0 13 10 +- 13 14 +- 11 3 7825 25 Aug 05 21:37 LAG1 17 0 10 0 +- 12 -5 +- 7 6 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 18 Aug 05 01:14 LAG2 2 0 23 11 +- 595 22 +- 390 0 7832 20 Aug 05 01:19 LAG2 14 0 11 11 +- 18 4 +- 13 3 7832 20 Aug 05 03:23 LAG1 10 0 30 19 +- 33 8 +- 23 3 7832 20 Aug 05 16:01 LAG1 8 0 6 4 +- 43 -5 +- 40 5 7832 20 Aug 05 19:21 LAG1 10 0 16 -8 +- 20 -10 +- 17 2 7832 20 Aug 05 23:35 LAG2 10 0 5 4 +- 20 0 +- 24 3 7832 21 Aug 05 01:57 LAG1 10 0 12 -2 +- 22 -9 +- 19 3 7832 21 Aug 05 03:31 LAG2 11 0 18 12 +- 37 21 +- 28 2 7832 21 Aug 05 05:31 LAG1 12 0 27 -5 +- 30 -15 +- 19 3 7832 21 Aug 05 17:51 LAG1 9 0 13 -12 +- 79 -10 +- 37 7 7832 21 Aug 05 21:31 LAG1 6 0 24 -23 +- 27 0 +- 68 5 7832 22 Aug 05 00:43 LAG1 7 0 13 -11 +- 25 15 +- 53 2 7832 22 Aug 05 01:31 LAG2 13 0 10 5 +- 19 6 +- 13 5 7832 22 Aug 05 04:09 LAG1 10 0 15 -4 +- 35 11 +- 22 4 7832 22 Aug 05 14:33 LAG2 3 0 24 36 +- 341 -61 +- 347 1 7832 22 Aug 05 16:27 LAG1 6 0 23 -4 +- 98 -12 +- 46 6 7832 22 Aug 05 20:11 LAG1 10 0 4 -1 +- 22 -3 +- 25 2 7832 22 Aug 05 23:49 LAG2 9 0 11 -15 +- 33 -7 +- 41 1 7832 23 Aug 05 02:35 LAG1 11 0 9 -6 +- 29 2 +- 22 2 7832 23 Aug 05 03:49 LAG2 11 0 10 12 +- 26 6 +- 27 3 7832 23 Aug 05 06:21 LAG1 10 0 19 24 +- 36 -5 +- 31 3 7832 23 Aug 05 15:23 LAG1 9 0 9 1 +- 27 -11 +- 35 4 7832 23 Aug 05 18:43 LAG1 9 0 11 -6 +- 44 -9 +- 29 6 7832 24 Aug 05 01:19 LAG1 11 0 27 -20 +- 23 10 +- 24 2 7832 24 Aug 05 01:43 LAG2 13 0 19 -9 +- 44 -15 +- 25 2 7832 24 Aug 05 04:41 LAG1 9 0 4 4 +- 61 1 +- 33 3 7832 24 Aug 05 06:28 LAG2 5 0 12 0 +- 133 -12 +- 128 4 7832 24 Aug 05 17:17 LAG1 12 0 14 -14 +- 22 -6 +- 12 7 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 18 Aug 05 02:21 LAG2 6 0 81 55 +- 152 21 +- 123 6 7838 18 Aug 05 06:10 LAG2 11 0 40 44 +- 35 -6 +- 28 5 7838 18 Aug 05 19:43 LAG2 18 0 38 33 +- 23 7 +- 16 3 7838 19 Aug 05 00:13 LAG2 10 0 78 50 +- 53 29 +- 49 7 7838 19 Aug 05 04:15 LAG2 13 0 51 48 +- 26 14 +- 23 7 7838 19 Aug 05 09:37 LAG1 13 0 21 9 +- 28 -14 +- 30 8 7838 19 Aug 05 13:07 LAG1 11 0 25 23 +- 44 0 +- 27 8 7838 19 Aug 05 16:39 LAG1 11 0 15 12 +- 30 3 +- 36 7 7838 19 Aug 05 17:59 LAG2 17 0 67 66 +- 23 0 +- 22 10 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 18 Aug 05 06:27 LAG1 14 0 6 1 +- 25 -3 +- 12 2 7839 18 Aug 05 09:23 LAG2 8 0 8 -9 +- 17 -7 +- 18 0 7839 19 Aug 05 07:24 LAG2 12 0 12 -2 +- 16 8 +- 10 1 7839 19 Aug 05 08:29 LAG1 9 0 29 5 +- 23 -20 +- 14 2 7839 19 Aug 05 11:33 LAG2 10 0 18 5 +- 15 8 +- 8 1 7839 23 Aug 05 06:26 LAG1 14 0 11 0 +- 12 -6 +- 6 2 7839 23 Aug 05 07:36 LAG2 17 0 10 1 +- 13 6 +- 8 3 7839 24 Aug 05 20:57 LAG1 6 0 6 -5 +- 27 1 +- 28 1 7839 25 Aug 05 07:09 LAG1 17 0 5 -2 +- 11 -4 +- 7 1 7839 25 Aug 05 08:05 LAG2 15 0 8 -7 +- 10 2 +- 9 0 7839 25 Aug 05 11:59 LAG2 23 1 8 -1 +- 8 -1 +- 4 7 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 18 Aug 05 02:49 LAG1 17 0 23 21 +- 16 3 +- 10 6 7840 18 Aug 05 05:15 LAG2 14 0 2 1 +- 17 0 +- 14 1 7840 18 Aug 05 06:15 LAG1 15 0 8 0 +- 17 -3 +- 8 5 7840 18 Aug 05 09:15 LAG2 13 0 8 4 +- 18 -4 +- 12 2 7840 18 Aug 05 10:10 LAG1 4 0 12 11 +- 65 1 +- 145 2 7840 18 Aug 05 13:15 LAG2 16 0 13 0 +- 16 -10 +- 12 2 7840 18 Aug 05 18:33 LAG1 2 0 14 129 +- 587 298 +-1469 0 7840 21 Aug 05 11:39 LAG2 12 0 14 13 +- 19 5 +- 18 3 7840 21 Aug 05 21:21 LAG1 16 0 11 -11 +- 16 1 +- 8 2 7840 22 Aug 05 00:53 LAG1 13 0 14 -5 +- 18 7 +- 11 3 7840 22 Aug 05 05:35 LAG2 19 0 15 8 +- 15 8 +- 10 4 7840 23 Aug 05 06:35 LAG1 16 0 12 5 +- 17 -7 +- 11 3 7840 23 Aug 05 07:41 LAG2 13 0 11 1 +- 19 5 +- 10 5 7840 23 Aug 05 11:47 LAG2 15 0 13 2 +- 17 -6 +- 9 4 7840 23 Aug 05 19:03 LAG1 2 0 3 -25 +- 670 16 +- 509 0 7840 23 Aug 05 22:09 LAG1 20 0 5 -3 +- 14 0 +- 7 4 7840 24 Aug 05 01:43 LAG1 17 0 9 -4 +- 16 5 +- 10 1 7840 24 Aug 05 05:25 LAG1 8 0 14 10 +- 49 2 +- 29 2 7840 24 Aug 05 05:50 LAG2 5 0 8 18 +- 104 7 +- 67 2 7840 25 Aug 05 07:17 LAG1 16 0 6 2 +- 17 -3 +- 11 3 7840 25 Aug 05 07:57 LAG2 17 0 9 4 +- 16 4 +- 9 3 7840 25 Aug 05 12:01 LAG2 11 0 8 0 +- 20 -5 +- 13 2 7840 25 Aug 05 19:27 LAG1 16 0 14 5 +- 16 -9 +- 13 3 7840 25 Aug 05 22:57 LAG1 17 0 7 4 +- 17 -1 +- 10 3 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 18 Aug 05 02:53 LAG1 13 0 20 10 +- 14 8 +- 10 5 7841 18 Aug 05 05:15 LAG2 17 0 8 6 +- 10 -3 +- 7 1 7841 18 Aug 05 06:19 LAG1 14 0 8 4 +- 11 -5 +- 8 2 7841 18 Aug 05 09:21 LAG2 8 0 7 6 +- 24 7 +- 24 6 7841 18 Aug 05 18:23 LAG1 10 0 3 0 +- 16 -2 +- 19 2 7841 18 Aug 05 21:58 LAG1 14 0 5 -3 +- 11 -1 +- 8 2 7841 22 Aug 05 20:05 LAG1 15 0 15 -1 +- 11 -9 +- 7 3 7841 22 Aug 05 23:32 LAG1 11 0 13 -10 +- 14 3 +- 12 4 7841 25 Aug 05 00:23 LAG1 8 0 15 -8 +- 19 8 +- 20 5 Station 7848 (Ajaccio) (position solved, acc. 30 mm) 7848 23 Aug 05 03:55 LAG2 2 0 4 3 +- 80 11 +- 172 0 7848 23 Aug 05 22:27 LAG1 4 0 2 1 +- 54 8 +- 138 0 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 18 Aug 05 05:09 LAG2 13 0 2 0 +- 14 -1 +- 11 1 7941 18 Aug 05 06:15 LAG1 11 0 2 -1 +- 13 0 +- 11 1 7941 18 Aug 05 09:23 LAG2 7 0 6 -9 +- 23 -8 +- 26 2 7941 18 Aug 05 21:59 LAG1 14 0 5 4 +- 12 0 +- 8 2 7941 19 Aug 05 05:01 LAG1 2 0 7 -7 +- 38 1 +- 293 0 7941 19 Aug 05 20:39 LAG1 19 0 11 -8 +- 9 5 +- 5 1 7941 20 Aug 05 00:18 LAG1 10 0 2 1 +- 23 0 +- 17 1 7941 20 Aug 05 03:29 LAG1 8 0 20 29 +- 25 11 +- 22 1 7941 20 Aug 05 14:09 LAG2 5 0 48 28 +- 226 -35 +- 105 3 7941 21 Aug 05 07:41 LAG2 10 0 5 1 +- 13 6 +- 17 2 7941 21 Aug 05 21:24 LAG1 11 0 16 -15 +- 12 5 +- 7 3 7941 22 Aug 05 00:55 LAG1 13 0 12 -8 +- 11 9 +- 11 4 7941 22 Aug 05 04:26 LAG1 9 0 7 2 +- 22 2 +- 14 4 7941 22 Aug 05 05:41 LAG2 12 0 14 14 +- 12 6 +- 12 2 7941 22 Aug 05 09:52 LAG2 4 0 14 2 +- 89 -9 +- 75 3 7941 23 Aug 05 02:57 LAG1 3 0 7 31 +- 212 24 +- 139 0 7941 23 Aug 05 03:41 LAG2 5 0 28 30 +- 178 30 +- 91 2 7941 23 Aug 05 06:19 LAG1 22 0 9 4 +- 9 -3 +- 4 6 7941 23 Aug 05 07:41 LAG2 17 0 8 6 +- 13 6 +- 9 3 7941 24 Aug 05 06:01 LAG2 5 0 7 6 +- 33 0 +- 50 3 7941 25 Aug 05 08:05 LAG2 12 0 1 0 +- 14 0 +- 14 1 7941 25 Aug 05 22:59 LAG1 12 0 8 -4 +- 14 4 +- 12 1 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 18 Aug 05 02:54 LAG1 8 0 15 2 +- 17 14 +- 18 3 8834 18 Aug 05 05:07 LAG2 18 0 7 0 +- 12 2 +- 8 6 8834 18 Aug 05 06:21 LAG1 6 0 9 6 +- 17 3 +- 20 6 8834 18 Aug 05 09:25 LAG2 5 0 1 -1 +- 37 -2 +- 49 1 8834 18 Aug 05 13:29 LAG2 12 0 10 -2 +- 13 -6 +- 12 6 8834 18 Aug 05 18:31 LAG1 2 0 8 -21 +- 235 -35 +- 288 0 8834 18 Aug 05 21:55 LAG1 12 0 14 -6 +- 13 5 +- 8 5 8834 19 Aug 05 01:38 LAG1 3 0 15 -11 +- 37 -3 +- 29 0 8834 19 Aug 05 03:44 LAG2 2 0 7 2 +- 179 6 +- 236 0 8834 19 Aug 05 04:54 LAG1 5 0 5 -6 +- 34 -2 +- 28 3 8834 19 Aug 05 08:31 LAG1 5 0 15 6 +- 45 -9 +- 48 3 8834 19 Aug 05 11:51 LAG2 2 0 29 -101 +- 451 99 +- 343 0 8834 19 Aug 05 15:51 LAG2 2 0 32 -63 +-1008 23 +- 753 0 8834 19 Aug 05 20:43 LAG1 2 0 33 -24 +-1182 6 +- 836 0 8834 21 Aug 05 07:57 LAG2 3 0 4 -26 +- 154 22 +- 134 1 8834 21 Aug 05 11:41 LAG2 4 0 16 -12 +- 181 1 +- 100 4 8834 24 Aug 05 20:57 LAG1 5 0 12 -4 +- 21 7 +- 19 6 8834 25 Aug 05 00:23 LAG1 3 0 29 -21 +- 95 6 +- 76 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 - 050404 0/ 9/ 0 0/ 14/ 0 23 1831 LVIL 050117 - 050821 0/ 33/ 0 0/ 20/ 0 53 1864 MD2LAS 050110 - 050824 0/ 89/ 0 0/ 46/ 0 135 1873 SIMLAS 050316 - 050825 0/ 33/ 0 0/ 14/ 0 47 1884 RIGLAS 050104 - 050825 0/ 52/ 0 3/ 42/ 3 100 1893 CRMLAS 050723 - 050814 0/ 12/ 0 0/ 0/ 0 12 6405 TIGO 050104 - 050706 7/ 18/ 2 8/ 21/ 2 58 6810 ZIMLAT 050101 - 050824 222/137/ 24 194/ 71/ 18 666 7080 MLRS25 050101 - 050819 39/ 71/ 4 27/ 68/ 10 219 7090 ML0514 050101 - 050825 124/382/ 32 110/309/ 28 985 7105 ML0725 050108 - 050825 3/ 61/ 7 16/ 58/ 6 151 7110 ML0414 050118 - 050825 89/134/ 23 55/109/ 13 423 7124 ML0819 050118 - 050824 1/ 32/ 0 1/ 14/ 1 49 7231 WUHA01 050825 - 050825 0/ 1/ 0 0/ 0/ 0 1 7237 CHALAS 050102 - 050807 0/ 62/ 1 0/ 71/ 0 134 7249 BEJLAS 050101 - 050820 0/ 71/ 0 0/ 70/ 0 141 7308 CRLLAS 050111 - 050510 7/ 5/ 1 1/ 10/ 0 24 7355 TROS02 050603 - 050821 0/ 43/ 0 0/ 7/ 0 50 7358 GMSL 050802 - 050821 0/ 4/ 0 2/ 0/ 0 6 7405 TIGO 050105 - 050705 5/ 26/ 0 3/ 7/ 0 41 7501 ML0616 050117 - 050825 42/115/ 4 40/ 98/ 7 306 7806 METLAS 050301 - 050301 0/ 0/ 0 0/ 1/ 0 1 7810 ZIMLAT 050101 - 050824 199/136/ 23 188/ 65/ 17 628 7811 POLLAS 050111 - 050820 0/ 59/ 0 0/ 39/ 0 98 7824 SPNLAS 050108 - 050825 5/115/ 1 2/ 92/ 3 218 7825 STL3 050101 - 050825 274/342/ 33 183/270/ 29 1131 7832 SALRO 050101 - 050824 91/203/ 17 129/186/ 22 648 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 - 050819 48/ 81/ 2 35/ 79/ 6 251 7839 AUSLAS 050103 - 050825 165/120/ 18 119/ 91/ 13 526 7840 RGOLAS 050102 - 050826 195/132/ 28 151/ 90/ 20 616 7841 GFZLA3 050105 - 050825 47/ 56/ 12 20/ 61/ 8 204 7848 FTLR06 050515 - 050823 4/ 31/ 0 3/ 11/ 0 49 7941 MLROnn 050102 - 050826 59/113/ 7 92/ 93/ 19 383 8834 WLRS01 050109 - 050825 165/135/ 22 155/103/ 20 600 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050819.0 28.2 +/- 0.1 429.6 +/- 0.1 -32648.37 +/- 0.01 050820.0 30.2 +/- 0.1 429.8 +/- 0.1 -32648.52 +/- 0.02 050821.0 30.8 +/- 0.1 429.5 +/- 0.1 -32649.02 +/- 0.03 050822.0 33.0 +/- 0.1 429.7 +/- 0.1 -32649.69 +/- 0.03 050823.0 34.0 +/- 0.1 429.1 +/- 0.1 -32650.44 +/- 0.04 050824.0 35.5 +/- 0.1 429.1 +/- 0.1 -32650.91 +/- 0.04 050825.0 36.7 +/- 0.1 428.4 +/- 0.1 -32651.12 +/- 0.04 -------------------------------------------------------------- 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 ******************************************************************************** |