| Date: | 2005-07-23 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 5691: Delft QL Report July 23, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-07-23 13:15:00 UTC Message No. 5691 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report July 23, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS July 23, 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 Sat, Jul 23, 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 Sat, Jul 23, 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 ------------------------------------------------------------------------------ 7090 Yarragadee, Australia 050722 - 050722 - 1 7105 Greenbelt, Maryland 050721 - 050721 1 - 7110 Monument Peak, California 050721 - 050721 2 - 7237 Changchun, China 050722 - 050722 1 - 7355 Urumqi, China (TROS) 050721 - 050721 1 - 7824 San Fernando, Spain 050721 - 050722 3 1 7825 Mount Stromlo, Australia 050721 - 050722 10 6 7832 Riyad, Saudi Arabia 050723 - 050723 1 - 7838 Simosato Observatory, Japan 050721 - 050722 2 - 7839 Graz, Austria 050721 - 050722 3 3 7840 Herstmonceux, United Kingdom 050718 - 050722 12 6 7941 Matera, Italy (MLRO 532) 050721 - 050722 2 2 ------ ------ --- --- TOTAL 050718 - 050723 38 19 ------------------------------------------------------------------------------ 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 Fri, Jul 15, 2005 to Sat, Jul 23, 2005. The measurement and dynamic models used in this analysis are close to the IERS Standard. The overall model is referred to as QLDACMOD11. The details of this model can be obtained on request. The terrestrial reference frame is provided by the ITRF2000 station coordinates solution (extended with coordinates of new stations, where necessary). The general statistics and results of this week´s analysis are thus: ----------------------------------------------------------------------- Satellite LAGEOS-1 LAGEOS-2 Number of Stations 23 16 Number of Passes 230/230 149/147 Number of Normal Points 2628/2607 1876/1830 Weighted RMS of Fit (mm) 14 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 1831 (Lviv) (position fixed, acc. 400 mm) 1831 18 Jul 05 22:03 LAG1 7 0 58 -51 +- 455 36 +- 613 17 Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 15 Jul 05 18:56 LAG1 11 0 22 0 +- 197 -7 +- 135 19 1864 15 Jul 05 22:28 LAG1 2 0 62 -67 +- 466 -106 +-2775 0 1864 17 Jul 05 19:37 LAG1 11 0 29 4 +- 185 -8 +- 119 26 1864 18 Jul 05 18:15 LAG1 12 0 27 19 +- 174 -6 +- 94 17 1864 19 Jul 05 16:53 LAG1 9 0 18 11 +- 223 5 +- 158 14 1864 19 Jul 05 20:27 LAG1 12 0 21 3 +- 173 -6 +- 131 19 1864 20 Jul 05 19:03 LAG1 13 0 26 -18 +- 168 0 +- 103 19 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 15 Jul 05 22:35 LAG1 13 0 28 -34 +- 118 5 +- 71 3 1884 20 Jul 05 22:49 LAG1 11 0 13 4 +- 119 6 +- 85 4 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 15 Jul 05 00:01 LAG1 16 0 30 -31 +- 57 0 +- 30 3 6810 15 Jul 05 03:15 LAG1 21 0 32 -31 +- 39 4 +- 23 5 6810 15 Jul 05 06:37 LAG1 21 0 19 -17 +- 40 0 +- 18 7 6810 15 Jul 05 09:13 LAG2 19 0 28 -26 +- 41 -4 +- 21 4 6810 15 Jul 05 10:13 LAG1 14 0 26 -23 +- 50 -2 +- 38 7 6810 15 Jul 05 13:31 LAG2 17 0 20 -20 +- 53 0 +- 34 3 6810 15 Jul 05 17:33 LAG2 15 0 6 -4 +- 47 -1 +- 35 3 6810 15 Jul 05 18:53 LAG1 9 0 19 -18 +- 64 -7 +- 87 9 6810 15 Jul 05 22:25 LAG1 19 0 9 -5 +- 42 -3 +- 20 3 6810 16 Jul 05 01:55 LAG1 17 0 21 -16 +- 44 6 +- 27 3 6810 16 Jul 05 11:34 LAG2 11 0 16 -14 +- 63 -2 +- 46 3 6810 16 Jul 05 19:33 LAG2 11 0 17 -15 +- 55 -6 +- 46 2 6810 16 Jul 05 20:57 LAG1 19 0 13 -9 +- 44 -2 +- 23 9 6810 17 Jul 05 07:35 LAG1 14 0 6 -5 +- 59 0 +- 27 4 6810 17 Jul 05 09:59 LAG2 3 0 31 -16 +- 411 -9 +- 272 0 6810 17 Jul 05 13:39 LAG2 17 0 21 -21 +- 44 -1 +- 28 2 6810 17 Jul 05 17:47 LAG2 12 0 6 -1 +- 55 -5 +- 54 3 6810 17 Jul 05 19:36 LAG1 24 0 18 -17 +- 37 1 +- 25 5 6810 17 Jul 05 23:23 LAG1 14 0 8 0 +- 53 -3 +- 31 5 6810 18 Jul 05 02:41 LAG1 20 0 12 -3 +- 40 6 +- 23 4 6810 18 Jul 05 06:05 LAG1 25 0 15 -13 +- 36 -1 +- 17 6 6810 18 Jul 05 07:39 LAG2 12 0 20 -2 +- 57 -12 +- 33 3 6810 18 Jul 05 09:37 LAG1 21 0 9 -2 +- 39 -4 +- 26 5 6810 18 Jul 05 12:05 LAG2 10 0 20 -12 +- 184 -4 +- 103 3 6810 19 Jul 05 09:41 LAG2 6 0 17 18 +- 470 15 +- 208 1 6810 19 Jul 05 13:48 LAG2 5 0 25 1 +-1054 12 +- 472 1 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 15 Jul 05 21:13 LAG2 3 0 14 -31 +- 221 22 +- 292 0 7080 17 Jul 05 03:19 LAG2 8 0 7 1 +- 23 -12 +- 41 1 7080 17 Jul 05 05:10 LAG1 8 0 12 38 +- 90 -19 +- 40 3 7080 18 Jul 05 04:01 LAG1 2 0 19 286 +-2827 -129 +-1202 0 7080 18 Jul 05 07:13 LAG1 11 0 16 28 +- 40 -11 +- 23 7 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 15 Jul 05 19:31 LAG2 2 0 4 3 +- 390 -14 +- 726 0 7090 15 Jul 05 23:26 LAG2 16 0 12 -14 +- 13 6 +- 9 5 7090 16 Jul 05 04:14 LAG1 10 0 17 -13 +- 14 -2 +- 10 12 7090 16 Jul 05 10:51 LAG1 17 0 18 -10 +- 11 11 +- 6 2 7090 16 Jul 05 12:45 LAG2 26 0 3 -3 +- 8 0 +- 5 1 7090 16 Jul 05 14:17 LAG1 21 0 11 -3 +- 9 5 +- 4 2 7090 16 Jul 05 17:03 LAG2 25 0 9 5 +- 8 -8 +- 7 1 7090 16 Jul 05 21:17 LAG2 24 0 13 0 +- 8 8 +- 5 1 7090 17 Jul 05 03:10 LAG1 9 0 42 -54 +- 28 9 +- 17 2 7090 17 Jul 05 09:43 LAG1 7 0 11 5 +- 17 10 +- 22 1 7090 17 Jul 05 11:15 LAG2 15 0 23 -35 +- 17 16 +- 14 4 7090 17 Jul 05 12:59 LAG1 19 0 16 -1 +- 10 8 +- 5 2 7090 17 Jul 05 14:53 LAG2 24 0 9 8 +- 8 -1 +- 5 2 7090 17 Jul 05 19:14 LAG2 24 0 6 -1 +- 8 4 +- 6 2 7090 17 Jul 05 23:39 LAG2 17 0 15 -14 +- 11 0 +- 8 3 7090 18 Jul 05 01:39 LAG1 6 0 33 -38 +- 30 -7 +- 35 3 7090 18 Jul 05 05:19 LAG1 6 0 13 -5 +- 37 -3 +- 26 8 7090 18 Jul 05 08:29 LAG1 7 0 7 2 +- 17 5 +- 36 6 7090 18 Jul 05 11:31 LAG1 18 0 21 -16 +- 9 6 +- 6 6 7090 18 Jul 05 12:59 LAG2 26 0 9 6 +- 8 -5 +- 4 2 7090 18 Jul 05 15:07 LAG1 18 0 6 -5 +- 10 3 +- 6 2 7090 18 Jul 05 17:11 LAG2 29 0 7 2 +- 7 -5 +- 6 2 7090 18 Jul 05 21:29 LAG2 27 0 13 0 +- 8 8 +- 4 1 7090 19 Jul 05 00:17 LAG1 7 0 3 1 +- 18 -2 +- 34 2 7090 19 Jul 05 03:49 LAG1 15 0 32 -32 +- 12 0 +- 8 5 7090 19 Jul 05 10:17 LAG1 20 0 21 -1 +- 9 14 +- 6 1 7090 19 Jul 05 11:27 LAG2 10 0 16 -15 +- 16 16 +- 13 1 7090 19 Jul 05 13:37 LAG1 20 0 30 2 +- 9 14 +- 4 1 7090 19 Jul 05 15:09 LAG2 30 0 14 10 +- 7 -6 +- 5 4 7090 19 Jul 05 19:33 LAG2 11 0 13 1 +- 12 7 +- 8 5 7090 22 Jul 05 00:11 LAG2 2 0 9 37 +- 153 57 +- 293 0 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 18 Jul 05 06:51 LAG1 2 0 27 27 +- 638 0 +- 538 0 7105 18 Jul 05 23:51 LAG2 2 0 10 -8 +- 303 16 +- 271 0 7105 19 Jul 05 05:29 LAG1 8 0 7 7 +- 15 -1 +- 8 1 7105 19 Jul 05 08:47 LAG1 14 0 6 4 +- 11 4 +- 10 2 7105 20 Jul 05 04:09 LAG1 4 0 10 21 +- 103 7 +- 70 1 7105 20 Jul 05 07:41 LAG1 8 0 4 3 +- 17 1 +- 22 1 7105 20 Jul 05 23:51 LAG2 8 1 29 -13 +- 18 21 +- 13 13 7105 21 Jul 05 02:37 LAG1 23 0 8 5 +- 8 -2 +- 4 5 7105 21 Jul 05 06:15 LAG1 17 0 14 -1 +- 10 -9 +- 7 2 7105 21 Jul 05 09:33 LAG1 8 0 17 -25 +- 30 -8 +- 25 0 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 15 Jul 05 03:29 LAG2 2 0 3 -165 +-3733 72 +-1600 0 7110 15 Jul 05 04:26 LAG1 5 0 12 9 +- 120 -13 +- 70 1 7110 15 Jul 05 07:39 LAG1 11 0 9 1 +- 13 -7 +- 9 1 7110 16 Jul 05 05:03 LAG2 6 0 2 -2 +- 32 -7 +- 57 1 7110 16 Jul 05 06:13 LAG1 1 0 29 0 +- 0 0 +- 0 0 7110 16 Jul 05 09:49 LAG1 7 0 4 3 +- 16 2 +- 29 1 7110 16 Jul 05 16:29 LAG1 5 1 4 -5 +- 39 -2 +- 57 0 7110 17 Jul 05 21:13 LAG2 7 0 19 -21 +- 21 5 +- 35 2 7110 18 Jul 05 01:11 LAG2 12 0 5 2 +- 17 -2 +- 13 2 7110 18 Jul 05 03:37 LAG1 11 0 9 5 +- 15 -12 +- 18 2 7110 18 Jul 05 15:13 LAG2 4 0 3 0 +- 27 -6 +- 78 1 7110 18 Jul 05 17:10 LAG1 2 0 10 -64 +- 725 -26 +- 352 0 7110 18 Jul 05 19:14 LAG2 2 0 34 -29 +- 29 147 +- 288 0 7110 18 Jul 05 23:16 LAG2 5 0 45 -22 +- 38 19 +- 30 2 7110 19 Jul 05 03:15 LAG2 12 0 5 -2 +- 14 1 +- 10 3 7110 19 Jul 05 09:13 LAG1 9 0 12 10 +- 16 1 +- 12 4 7110 19 Jul 05 12:47 LAG1 3 0 27 -44 +- 221 14 +- 172 7 7110 20 Jul 05 04:25 LAG1 15 0 14 18 +- 14 -6 +- 9 3 7110 20 Jul 05 07:49 LAG1 10 0 14 11 +- 17 -3 +- 14 1 7110 21 Jul 05 10:05 LAG1 5 0 5 6 +- 25 -9 +- 52 1 7110 21 Jul 05 16:39 LAG1 15 0 10 -9 +- 11 -1 +- 7 2 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 22 Jul 05 12:37 LAG1 11 0 35 -30 +- 49 -4 +- 35 9 Station 7355 (Urumqi) (position solved, acc. 10 mm) 7355 17 Jul 05 16:03 LAG1 3 0 107 -44 +- 25 -104 +- 24 28 7355 17 Jul 05 19:39 LAG1 8 1 12 1 +- 20 -4 +- 24 11 7355 18 Jul 05 18:15 LAG1 7 3 14 -16 +- 26 -29 +- 47 2 7355 19 Jul 05 20:23 LAG1 10 0 19 6 +- 14 -16 +- 14 12 7355 21 Jul 05 17:39 LAG1 14 1 20 -1 +- 11 11 +- 8 14 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 15 Jul 05 04:39 LAG2 13 0 5 8 +- 28 2 +- 17 2 7501 15 Jul 05 16:13 LAG1 11 0 22 21 +- 12 7 +- 15 0 7501 15 Jul 05 18:17 LAG2 11 0 11 15 +- 21 4 +- 18 1 7501 15 Jul 05 19:29 LAG1 18 0 12 9 +- 9 -3 +- 5 1 7501 16 Jul 05 18:17 LAG1 17 0 12 13 +- 11 -2 +- 6 3 7501 16 Jul 05 20:19 LAG2 15 0 18 -9 +- 12 8 +- 10 5 7501 17 Jul 05 17:02 LAG1 5 0 28 29 +- 19 5 +- 45 0 7501 17 Jul 05 18:38 LAG2 16 0 9 5 +- 11 5 +- 9 1 7501 17 Jul 05 20:29 LAG1 12 0 10 -1 +- 13 -6 +- 9 1 7501 17 Jul 05 22:38 LAG2 24 0 29 -19 +- 8 23 +- 8 4 7501 19 Jul 05 18:11 LAG1 4 0 20 32 +- 495 -4 +- 188 1 7501 19 Jul 05 22:57 LAG2 22 0 45 -36 +- 9 33 +- 9 6 7501 20 Jul 05 03:13 LAG2 11 0 21 1 +- 19 17 +- 15 4 7501 20 Jul 05 10:05 LAG1 3 0 31 5 +- 137 28 +- 150 2 7501 20 Jul 05 16:36 LAG1 5 0 35 30 +- 45 4 +- 33 4 7501 20 Jul 05 19:47 LAG1 21 0 14 12 +- 9 1 +- 5 3 7501 20 Jul 05 20:51 LAG2 10 0 19 -5 +- 13 12 +- 8 4 7501 21 Jul 05 01:53 LAG2 5 0 61 7 +- 197 32 +- 119 1 7501 21 Jul 05 05:25 LAG2 13 0 17 9 +- 16 19 +- 13 4 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 15 Jul 05 00:01 LAG1 15 0 6 -6 +- 57 0 +- 32 2 7810 15 Jul 05 03:15 LAG1 20 0 10 -5 +- 40 4 +- 25 4 7810 15 Jul 05 06:45 LAG1 16 0 6 3 +- 46 -1 +- 23 5 7810 15 Jul 05 09:17 LAG2 15 0 8 -4 +- 47 -3 +- 25 5 7810 15 Jul 05 10:18 LAG1 11 0 4 0 +- 57 1 +- 58 4 7810 15 Jul 05 13:31 LAG2 18 0 7 -6 +- 53 0 +- 33 3 7810 15 Jul 05 17:33 LAG2 12 0 7 6 +- 54 0 +- 49 2 7810 15 Jul 05 18:58 LAG1 4 0 13 -16 +- 199 -11 +- 288 9 7810 15 Jul 05 22:25 LAG1 17 0 6 -2 +- 44 -2 +- 20 3 7810 16 Jul 05 01:55 LAG1 18 0 12 -6 +- 43 5 +- 26 3 7810 16 Jul 05 11:43 LAG2 10 0 11 2 +- 80 -9 +- 60 2 7810 16 Jul 05 19:33 LAG2 2 0 10 66 +-4143 31 +-2332 0 7810 16 Jul 05 20:57 LAG1 18 0 6 -2 +- 48 0 +- 26 6 7810 17 Jul 05 07:34 LAG1 10 0 6 2 +- 65 0 +- 32 5 7810 17 Jul 05 09:59 LAG2 3 0 23 31 +- 782 -42 +- 610 1 7810 17 Jul 05 13:39 LAG2 14 0 14 -15 +- 54 -3 +- 38 3 7810 17 Jul 05 17:47 LAG2 11 0 11 7 +- 64 -5 +- 63 2 7810 17 Jul 05 19:36 LAG1 20 0 17 -15 +- 42 3 +- 32 3 7810 17 Jul 05 23:31 LAG1 12 0 4 1 +- 71 -3 +- 43 2 7810 18 Jul 05 02:41 LAG1 20 0 12 -1 +- 41 7 +- 25 2 7810 18 Jul 05 06:10 LAG1 13 0 10 -6 +- 51 0 +- 36 8 7810 18 Jul 05 07:43 LAG2 7 0 26 -6 +- 71 -15 +- 43 10 7810 18 Jul 05 09:37 LAG1 15 0 13 -3 +- 48 2 +- 33 13 7810 18 Jul 05 12:07 LAG2 9 0 18 -7 +- 230 -6 +- 123 4 7810 19 Jul 05 09:43 LAG2 4 0 17 -57 +-1728 -17 +- 742 1 7810 19 Jul 05 13:48 LAG2 4 0 22 -26 +-1526 -1 +- 666 2 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 15 Jul 05 00:01 LAG1 10 0 14 15 +- 78 -3 +- 59 6 7811 19 Jul 05 20:37 LAG1 8 0 14 0 +- 68 -8 +- 88 12 7811 20 Jul 05 00:21 LAG1 5 0 24 23 +- 226 0 +- 182 7 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 18 Jul 05 22:31 LAG1 5 0 62 103 +- 360 -20 +- 177 1 7824 19 Jul 05 20:57 LAG1 1 0 46 0 +- 0 0 +- 0 0 7824 20 Jul 05 00:25 LAG1 5 0 83 86 +- 79 7 +- 123 2 7824 20 Jul 05 20:19 LAG2 2 0 79 76 +- 167 -72 +-3435 0 7824 20 Jul 05 23:17 LAG1 7 0 63 95 +- 219 -15 +- 103 4 7824 21 Jul 05 09:35 LAG1 3 0 63 102 +-1118 -17 +- 500 1 7824 22 Jul 05 01:17 LAG1 2 0 76 75 +- 95 -34 +- 884 0 7824 22 Jul 05 07:49 LAG1 5 0 66 76 +- 203 6 +- 139 3 7824 22 Jul 05 08:01 LAG2 12 0 88 94 +- 43 10 +- 40 7*CHK* Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 15 Jul 05 02:21 LAG1 6 0 20 -114 +- 138 54 +- 60 9 7825 15 Jul 05 08:33 LAG1 14 0 4 0 +- 11 0 +- 6 4 7825 15 Jul 05 10:53 LAG2 24 0 4 3 +- 8 1 +- 5 3 7825 15 Jul 05 11:59 LAG1 19 0 12 -5 +- 9 5 +- 5 4 7825 16 Jul 05 00:51 LAG1 7 0 9 -15 +- 41 5 +- 27 2 7825 16 Jul 05 07:22 LAG1 13 0 18 -1 +- 12 -7 +- 10 15 7825 16 Jul 05 21:25 LAG2 21 0 16 -6 +- 9 9 +- 7 3 7825 16 Jul 05 23:07 LAG1 15 0 10 -11 +- 12 -1 +- 9 1 7825 17 Jul 05 09:27 LAG1 15 0 3 -2 +- 11 0 +- 7 2 7825 17 Jul 05 11:17 LAG2 16 0 11 2 +- 10 7 +- 8 3 7825 17 Jul 05 12:55 LAG1 13 0 4 2 +- 11 -2 +- 10 3 7825 17 Jul 05 15:16 LAG2 25 0 6 3 +- 8 -3 +- 6 2 7825 17 Jul 05 19:29 LAG2 27 0 9 6 +- 8 4 +- 4 2 7825 18 Jul 05 01:17 LAG1 17 0 16 0 +- 10 -9 +- 6 6 7825 18 Jul 05 04:49 LAG1 11 0 14 7 +- 12 -12 +- 12 3 7825 18 Jul 05 08:01 LAG1 13 0 17 -1 +- 11 -9 +- 6 4 7825 18 Jul 05 09:17 LAG2 17 2 7 0 +- 11 -5 +- 8 2 7825 18 Jul 05 11:24 LAG1 16 0 13 -11 +- 10 1 +- 5 8 7825 18 Jul 05 13:17 LAG2 23 0 13 3 +- 8 -8 +- 5 4 7825 18 Jul 05 17:43 LAG2 21 0 6 6 +- 10 -2 +- 7 1 7825 18 Jul 05 21:53 LAG2 17 0 7 -4 +- 11 2 +- 10 6 7825 19 Jul 05 00:07 LAG1 9 0 3 0 +- 14 0 +- 11 3 7825 19 Jul 05 03:37 LAG1 12 0 22 -17 +- 15 -5 +- 13 1 7825 19 Jul 05 06:55 LAG1 8 0 8 -4 +- 15 -9 +- 24 1 7825 19 Jul 05 10:05 LAG1 23 0 15 -5 +- 8 7 +- 4 4 7825 19 Jul 05 11:19 LAG2 24 0 16 0 +- 8 8 +- 5 5 7825 19 Jul 05 13:53 LAG1 9 0 13 10 +- 14 10 +- 29 5 7825 19 Jul 05 15:33 LAG2 23 0 14 10 +- 9 -5 +- 7 2 7825 19 Jul 05 19:43 LAG2 26 0 11 9 +- 8 2 +- 4 3 7825 19 Jul 05 22:33 LAG1 13 1 16 12 +- 16 -2 +- 14 6 7825 20 Jul 05 02:03 LAG1 15 0 10 3 +- 10 -2 +- 5 8 7825 20 Jul 05 05:41 LAG1 9 0 11 -1 +- 20 -11 +- 22 1 7825 20 Jul 05 08:43 LAG1 18 0 16 -9 +- 10 -5 +- 5 6 7825 20 Jul 05 09:29 LAG2 22 0 19 3 +- 8 -12 +- 6 4 7825 20 Jul 05 12:17 LAG1 18 0 14 -5 +- 9 8 +- 6 3 7825 20 Jul 05 13:32 LAG2 24 0 20 1 +- 8 -13 +- 5 3 7825 20 Jul 05 17:47 LAG2 16 0 19 5 +- 10 -9 +- 5 1 7825 20 Jul 05 21:21 LAG1 4 0 19 31 +- 43 42 +- 109 6 7825 20 Jul 05 22:01 LAG2 18 0 7 2 +- 10 2 +- 9 6 7825 21 Jul 05 00:41 LAG1 17 0 15 4 +- 10 -7 +- 5 3 7825 21 Jul 05 04:33 LAG1 5 0 18 15 +- 78 -24 +- 59 3 7825 21 Jul 05 07:35 LAG1 12 0 26 -23 +- 12 -9 +- 12 2 7825 21 Jul 05 10:49 LAG1 21 0 13 -6 +- 9 3 +- 5 8 7825 21 Jul 05 11:35 LAG2 24 0 19 8 +- 8 8 +- 4 8 7825 21 Jul 05 15:47 LAG2 21 0 4 1 +- 9 0 +- 6 3 7825 21 Jul 05 19:55 LAG2 28 0 15 12 +- 7 6 +- 4 4 7825 21 Jul 05 23:21 LAG1 21 0 10 -8 +- 9 -2 +- 5 3 7825 22 Jul 05 02:55 LAG1 16 1 21 1 +- 11 -9 +- 9 18 7825 22 Jul 05 06:16 LAG1 8 1 8 4 +- 16 -9 +- 30 1 7825 22 Jul 05 09:35 LAG1 13 0 12 -12 +- 12 2 +- 5 3 7825 22 Jul 05 09:43 LAG2 18 0 9 -6 +- 10 -3 +- 5 2 7825 22 Jul 05 13:13 LAG1 15 0 3 -2 +- 11 2 +- 12 2 7825 22 Jul 05 13:45 LAG2 25 0 10 -8 +- 8 -5 +- 6 2 7825 22 Jul 05 18:03 LAG2 27 0 9 8 +- 8 -2 +- 5 2 7825 22 Jul 05 22:04 LAG1 4 0 18 49 +- 114 28 +- 100 4 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 16 Jul 05 07:45 LAG2 6 0 7 0 +- 30 -8 +- 57 5 7832 16 Jul 05 15:57 LAG2 16 0 7 0 +- 19 -5 +- 14 2 7832 16 Jul 05 17:37 LAG1 2 0 2 -35 +-2011 -15 +- 909 0 7832 16 Jul 05 21:15 LAG1 11 0 5 -2 +- 19 -4 +- 20 1 7832 17 Jul 05 07:33 LAG1 5 0 25 8 +- 125 12 +- 91 1 7832 17 Jul 05 16:25 LAG1 9 0 7 6 +- 22 6 +- 40 2 7832 17 Jul 05 18:11 LAG2 6 0 14 -4 +- 47 -25 +- 73 5 7832 17 Jul 05 19:43 LAG1 16 0 7 -7 +- 20 -4 +- 11 3 7832 18 Jul 05 07:51 LAG2 11 0 15 -2 +- 20 -20 +- 26 1 7832 18 Jul 05 16:11 LAG2 11 0 8 6 +- 41 0 +- 28 4 7832 18 Jul 05 18:31 LAG1 9 0 11 -11 +- 30 -2 +- 25 4 7832 18 Jul 05 21:59 LAG1 12 0 8 -4 +- 19 -8 +- 20 2 7832 19 Jul 05 05:59 LAG2 3 0 4 -6 +- 169 -2 +- 190 1 7832 19 Jul 05 14:29 LAG2 7 1 14 -14 +- 43 12 +- 24 1 7832 19 Jul 05 17:02 LAG1 13 0 11 5 +- 18 -2 +- 11 8 7832 19 Jul 05 20:45 LAG1 11 0 12 -11 +- 21 -2 +- 20 2 7832 20 Jul 05 16:35 LAG2 9 0 9 8 +- 22 0 +- 33 3 7832 20 Jul 05 19:35 LAG1 9 0 8 -9 +- 67 0 +- 34 4 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 15 Jul 05 06:25 LAG2 7 0 70 59 +- 49 13 +- 58 17 7838 15 Jul 05 10:26 LAG2 7 0 41 42 +- 38 18 +- 63 9 7838 15 Jul 05 11:29 LAG1 13 0 36 31 +- 27 -2 +- 23 16 7838 15 Jul 05 15:09 LAG1 10 0 22 21 +- 30 -6 +- 30 4 7838 16 Jul 05 13:35 LAG1 17 0 35 30 +- 25 -2 +- 13 13 7838 16 Jul 05 17:09 LAG1 12 0 49 45 +- 28 -10 +- 26 5 7838 17 Jul 05 12:25 LAG1 13 0 39 38 +- 27 -3 +- 21 10 7838 20 Jul 05 11:53 LAG1 12 0 22 21 +- 29 -2 +- 26 10 7838 20 Jul 05 15:14 LAG1 15 0 24 23 +- 24 0 +- 18 6 7838 21 Jul 05 14:03 LAG1 15 0 13 12 +- 29 -1 +- 17 7 7838 22 Jul 05 00:09 LAG1 13 0 15 13 +- 26 4 +- 21 6 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 15 Jul 05 00:01 LAG1 16 0 7 -8 +- 14 1 +- 8 1 7839 15 Jul 05 03:11 LAG1 16 0 12 -3 +- 10 6 +- 5 1 7839 15 Jul 05 07:01 LAG1 7 0 6 4 +- 39 -3 +- 16 2 7839 15 Jul 05 09:23 LAG2 21 0 7 -6 +- 9 0 +- 5 2 7839 15 Jul 05 10:31 LAG1 10 0 4 4 +- 16 0 +- 23 1 7839 15 Jul 05 13:25 LAG2 14 0 9 -9 +- 11 1 +- 7 1 7839 15 Jul 05 17:41 LAG2 13 0 5 5 +- 12 -4 +- 11 0 7839 15 Jul 05 18:59 LAG1 14 0 3 -1 +- 12 -2 +- 11 1 7839 17 Jul 05 19:43 LAG1 13 0 9 -9 +- 13 0 +- 12 1 7839 17 Jul 05 23:17 LAG1 22 0 6 1 +- 9 -3 +- 4 2 7839 18 Jul 05 02:41 LAG1 18 0 11 4 +- 9 6 +- 6 1 7839 18 Jul 05 06:23 LAG1 12 0 7 -9 +- 21 1 +- 12 1 7839 18 Jul 05 07:37 LAG2 17 0 21 4 +- 10 -11 +- 5 2 7839 18 Jul 05 09:45 LAG1 17 0 6 4 +- 10 -3 +- 9 1 7839 18 Jul 05 12:07 LAG2 11 0 8 -14 +- 33 3 +- 19 0 7839 19 Jul 05 13:57 LAG2 18 0 10 -4 +- 9 5 +- 5 1 7839 19 Jul 05 18:13 LAG2 11 0 2 3 +- 21 -2 +- 18 0 7839 19 Jul 05 20:27 LAG1 12 0 9 -9 +- 12 -1 +- 6 3 7839 20 Jul 05 00:05 LAG1 13 0 12 9 +- 11 -3 +- 6 2 7839 20 Jul 05 03:23 LAG1 22 0 14 10 +- 8 4 +- 5 4 7839 20 Jul 05 06:56 LAG1 23 0 9 -6 +- 9 -1 +- 4 3 7839 20 Jul 05 07:53 LAG2 18 0 13 1 +- 9 -8 +- 5 1 7839 20 Jul 05 11:56 LAG2 19 0 4 0 +- 9 1 +- 5 4 7839 20 Jul 05 16:05 LAG2 17 0 4 -2 +- 10 -2 +- 5 0 7839 21 Jul 05 09:57 LAG2 19 0 5 -2 +- 10 2 +- 6 0 7839 21 Jul 05 14:09 LAG2 22 0 9 0 +- 9 5 +- 4 2 7839 21 Jul 05 18:13 LAG2 11 0 4 1 +- 13 -3 +- 8 1 7839 21 Jul 05 21:17 LAG1 4 0 12 -62 +- 402 -19 +- 157 0 7839 22 Jul 05 00:49 LAG1 8 0 8 8 +- 16 3 +- 8 0 7839 22 Jul 05 04:09 LAG1 21 0 14 10 +- 9 5 +- 5 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 15 Jul 05 00:01 LAG1 16 0 5 0 +- 19 -2 +- 11 3 7840 15 Jul 05 10:31 LAG1 11 0 3 1 +- 20 2 +- 24 1 7840 15 Jul 05 13:35 LAG2 15 0 3 2 +- 25 0 +- 16 2 7840 15 Jul 05 17:39 LAG2 14 0 7 8 +- 26 -7 +- 17 2 7840 15 Jul 05 22:31 LAG1 17 0 11 3 +- 16 -5 +- 8 3 7840 16 Jul 05 01:59 LAG1 16 0 6 0 +- 16 2 +- 9 4 7840 16 Jul 05 05:29 LAG1 17 0 4 -1 +- 16 1 +- 10 3 7840 16 Jul 05 08:57 LAG1 19 0 8 6 +- 15 -3 +- 9 4 7840 16 Jul 05 11:23 LAG2 6 0 5 23 +- 142 12 +- 67 2 7840 16 Jul 05 15:33 LAG2 10 0 6 1 +- 21 -3 +- 13 3 7840 16 Jul 05 19:37 LAG2 9 0 15 -8 +- 22 -10 +- 21 2 7840 16 Jul 05 21:09 LAG1 14 0 12 3 +- 18 -8 +- 13 5 7840 17 Jul 05 00:37 LAG1 17 0 9 2 +- 16 3 +- 7 6 7840 17 Jul 05 04:17 LAG1 12 0 10 3 +- 22 6 +- 17 2 7840 17 Jul 05 07:35 LAG1 15 0 7 5 +- 17 1 +- 8 2 7840 17 Jul 05 09:58 LAG2 7 0 2 -4 +- 106 1 +- 60 1 7840 17 Jul 05 13:37 LAG2 18 0 4 -3 +- 15 0 +- 9 3 7840 17 Jul 05 17:38 LAG2 14 0 10 4 +- 19 -6 +- 14 2 7840 17 Jul 05 19:51 LAG1 7 0 1 0 +- 25 0 +- 59 1 7840 17 Jul 05 23:15 LAG1 19 0 11 -1 +- 15 -5 +- 8 6 7840 18 Jul 05 02:47 LAG1 8 0 13 16 +- 28 5 +- 18 1 7840 18 Jul 05 21:56 LAG1 9 0 5 3 +- 43 0 +- 29 3 7840 19 Jul 05 01:29 LAG1 13 0 6 5 +- 18 0 +- 11 3 7840 19 Jul 05 08:25 LAG1 16 0 7 4 +- 16 3 +- 10 4 7840 19 Jul 05 13:51 LAG2 13 0 9 3 +- 18 6 +- 14 3 7840 20 Jul 05 16:05 LAG2 9 0 4 0 +- 22 -2 +- 15 2 7840 20 Jul 05 22:43 LAG1 16 0 8 -5 +- 17 -5 +- 11 3 7840 21 Jul 05 02:17 LAG1 10 0 7 1 +- 21 -3 +- 12 2 7840 21 Jul 05 05:49 LAG1 12 0 16 -5 +- 20 -10 +- 16 1 7840 21 Jul 05 09:21 LAG1 12 0 22 20 +- 20 -16 +- 17 2 7840 21 Jul 05 10:01 LAG2 13 0 23 17 +- 18 10 +- 13 3 7840 21 Jul 05 14:07 LAG2 14 0 1112 7 +- 17 860 +- 13 2*CHK* 7840 21 Jul 05 18:13 LAG2 9 0 8 0 +- 23 -6 +- 19 1 7840 21 Jul 05 21:21 LAG1 8 0 20 -26 +- 71 -4 +- 45 2 7840 22 Jul 05 00:55 LAG1 15 0 5 3 +- 17 1 +- 9 3 7840 22 Jul 05 04:31 LAG1 10 0 23 22 +- 23 2 +- 22 2 7840 22 Jul 05 07:53 LAG1 11 0 10 7 +- 20 -3 +- 16 3 7840 22 Jul 05 08:17 LAG2 5 0 5 9 +- 72 6 +- 86 3 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 16 Jul 05 21:11 LAG1 12 0 11 -1 +- 13 -6 +- 10 3 7841 17 Jul 05 19:45 LAG1 12 0 3 -1 +- 12 0 +- 13 3 7841 20 Jul 05 08:01 LAG2 6 0 15 16 +- 51 0 +- 35 1 Station 7848 (Ajaccio) (position solved, acc. 30 mm) 7848 15 Jul 05 22:48 LAG1 1 0 3 0 +- 0 0 +- 0 0 7848 17 Jul 05 23:37 LAG1 1 0 2 0 +- 0 0 +- 0 0 7848 19 Jul 05 20:45 LAG1 4 0 1 0 +- 77 0 +- 93 1 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 15 Jul 05 00:11 LAG1 10 0 9 -13 +- 34 2 +- 18 1 7941 15 Jul 05 07:09 LAG1 4 0 14 25 +- 307 -4 +- 123 1 7941 15 Jul 05 13:49 LAG2 13 0 10 -12 +- 26 1 +- 16 2 7941 15 Jul 05 17:57 LAG2 11 0 6 13 +- 39 -9 +- 22 2 7941 15 Jul 05 19:01 LAG1 14 0 2 0 +- 11 -2 +- 12 1 7941 15 Jul 05 22:29 LAG1 8 0 10 1 +- 55 -4 +- 26 2 7941 16 Jul 05 01:59 LAG1 14 0 6 -2 +- 11 4 +- 9 2 7941 16 Jul 05 05:43 LAG1 2 0 6 14 +- 755 -14 +- 499 0 7941 16 Jul 05 07:31 LAG2 2 0 19 13 +- 753 -3 +- 432 0 7941 16 Jul 05 09:07 LAG1 2 0 13 12 +- 88 1 +- 284 0 7941 16 Jul 05 16:11 LAG2 6 0 5 -5 +- 140 0 +- 68 1 7941 16 Jul 05 21:07 LAG1 2 0 14 -76 +-1765 -34 +- 673 0 7941 17 Jul 05 00:39 LAG1 17 0 9 -2 +- 10 6 +- 7 1 7941 17 Jul 05 04:23 LAG1 2 0 7 -52 +- 441 36 +- 355 0 7941 17 Jul 05 07:47 LAG1 10 0 5 8 +- 42 -1 +- 20 2 7941 17 Jul 05 14:03 LAG2 4 0 11 -7 +- 41 -7 +- 73 0 7941 17 Jul 05 19:46 LAG1 10 0 4 0 +- 13 -2 +- 8 1 7941 17 Jul 05 23:39 LAG1 10 0 8 10 +- 38 -8 +- 19 2 7941 18 Jul 05 06:27 LAG1 5 0 3 -5 +- 79 0 +- 48 0 7941 18 Jul 05 18:27 LAG1 8 0 6 0 +- 20 7 +- 33 3 7941 18 Jul 05 21:59 LAG1 7 0 3 -4 +- 51 -4 +- 29 1 7941 19 Jul 05 01:39 LAG1 4 0 9 9 +- 27 -1 +- 63 3 7941 19 Jul 05 18:19 LAG2 8 0 9 12 +- 27 -11 +- 25 7 7941 19 Jul 05 20:33 LAG1 9 0 4 -9 +- 42 -3 +- 23 2 7941 20 Jul 05 00:07 LAG1 18 0 12 9 +- 10 -6 +- 6 4 7941 20 Jul 05 07:19 LAG1 6 0 15 59 +- 128 -31 +- 55 4 7941 20 Jul 05 07:59 LAG2 2 0 22 -25 +-1305 -29 +- 788 0 7941 20 Jul 05 16:31 LAG2 8 0 7 15 +- 38 -6 +- 19 1 7941 20 Jul 05 23:05 LAG1 6 0 11 0 +- 52 -7 +- 35 1 7941 21 Jul 05 14:45 LAG2 5 0 15 19 +- 204 -2 +- 98 3 7941 21 Jul 05 21:23 LAG1 4 0 16 -36 +- 279 -8 +- 119 0 7941 22 Jul 05 16:57 LAG2 5 0 3 17 +- 301 -6 +- 128 2 7941 22 Jul 05 20:03 LAG1 4 0 11 -31 +- 185 -24 +- 104 0 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 15 Jul 05 09:21 LAG2 11 0 22 -22 +- 13 0 +- 7 3 8834 15 Jul 05 13:53 LAG2 8 0 3 -7 +- 66 5 +- 34 1 8834 16 Jul 05 11:23 LAG2 8 0 11 -20 +- 113 -4 +- 49 7 8834 17 Jul 05 13:37 LAG2 3 0 15 35 +- 728 21 +- 307 0 8834 17 Jul 05 17:45 LAG2 9 0 15 19 +- 26 6 +- 22 8 8834 17 Jul 05 19:53 LAG1 4 0 2 0 +- 33 5 +- 82 1 8834 17 Jul 05 23:25 LAG1 9 0 6 5 +- 14 -1 +- 12 2 8834 18 Jul 05 06:19 LAG1 10 0 15 -15 +- 13 3 +- 13 3 8834 18 Jul 05 07:41 LAG2 10 0 11 -17 +- 30 -15 +- 20 3 8834 18 Jul 05 09:49 LAG1 10 0 11 8 +- 14 12 +- 16 3 8834 18 Jul 05 11:34 LAG2 9 0 17 -19 +- 21 -1 +- 9 3 8834 19 Jul 05 18:03 LAG2 12 0 8 0 +- 12 4 +- 12 7 8834 19 Jul 05 20:47 LAG1 2 0 11 -5 +- 44 73 +- 466 0 8834 20 Jul 05 00:11 LAG1 3 0 27 41 +- 199 11 +- 144 4 8834 20 Jul 05 07:17 LAG1 2 0 19 -43 +- 175 33 +- 236 0 8834 20 Jul 05 07:49 LAG2 9 0 11 -8 +- 88 -8 +- 41 4 8834 20 Jul 05 16:08 LAG2 10 0 14 -14 +- 16 -1 +- 16 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 050112 - 050404 0/ 9/ 0 0/ 14/ 0 23 1831 LVIL 050117 - 050718 0/ 27/ 0 0/ 20/ 0 47 1864 MD2LAS 050110 - 050720 0/ 59/ 0 0/ 46/ 0 105 1873 SIMLAS 050316 - 050711 0/ 23/ 0 0/ 14/ 0 37 1884 RIGLAS 050104 - 050720 0/ 36/ 0 3/ 42/ 3 84 6405 TIGO 050104 - 050706 7/ 18/ 2 8/ 21/ 2 58 6810 ZIMLAT 050101 - 050719 191/111/ 20 147/ 70/ 17 556 7080 MLRS25 050101 - 050718 36/ 61/ 4 25/ 67/ 8 201 7090 ML0514 050101 - 050722 108/341/ 27 105/235/ 21 837 7105 ML0725 050108 - 050721 1/ 34/ 2 13/ 54/ 5 109 7110 ML0414 050118 - 050721 77/103/ 15 39/103/ 9 346 7124 ML0819 050118 - 050622 0/ 29/ 0 0/ 9/ 0 38 7237 CHALAS 050102 - 050722 0/ 58/ 1 0/ 71/ 0 130 7249 BEJLAS 050101 - 050705 0/ 55/ 0 0/ 69/ 0 124 7308 CRLLAS 050111 - 050510 7/ 5/ 1 1/ 10/ 0 24 7355 TROS02 050603 - 050721 0/ 29/ 0 0/ 7/ 0 36 7405 TIGO 050105 - 050705 5/ 26/ 0 3/ 7/ 0 41 7501 ML0616 050117 - 050721 40/110/ 3 40/ 87/ 7 287 7806 METLAS 050301 - 050301 0/ 0/ 0 0/ 1/ 0 1 7810 ZIMLAT 050101 - 050719 169/110/ 18 140/ 64/ 16 517 7811 POLLAS 050111 - 050720 0/ 43/ 0 0/ 39/ 0 82 7824 SPNLAS 050108 - 050722 3/ 88/ 0 1/ 92/ 3 187 7825 STL3 050101 - 050722 203/301/ 30 176/193/ 21 924 7832 SALRO 050101 - 050723 71/161/ 11 98/173/ 17 531 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 - 050722 46/ 58/ 1 24/ 76/ 4 209 7839 AUSLAS 050103 - 050722 148/ 98/ 12 87/ 90/ 13 448 7840 RGOLAS 050102 - 050722 170/ 97/ 19 115/ 90/ 20 511 7841 GFZLA3 050105 - 050720 43/ 38/ 10 17/ 61/ 8 177 7848 FTLR06 050515 - 050719 4/ 30/ 0 3/ 10/ 0 47 7941 MLROnn 050102 - 050722 48/ 84/ 5 69/ 92/ 18 316 8834 WLRS01 050109 - 050720 154/104/ 17 126/103/ 18 522 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 050716.0 -21.8 +/- 0.1 413.9 +/- 0.1 -32663.63 +/- 0.01 050717.0 -20.7 +/- 0.1 414.9 +/- 0.1 -32663.22 +/- 0.02 050718.0 -19.7 +/- 0.1 415.1 +/- 0.1 -32662.57 +/- 0.02 050719.0 -19.1 +/- 0.1 415.2 +/- 0.1 -32661.73 +/- 0.03 050720.0 -17.8 +/- 0.1 415.0 +/- 0.1 -32660.84 +/- 0.03 050721.0 -16.9 +/- 0.1 415.9 +/- 0.1 -32659.97 +/- 0.03 050722.0 -14.5 +/- 0.1 416.0 +/- 0.1 -32659.28 +/- 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 ******************************************************************************** |