| Date: | 2005-12-13 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6502: Delft QL Report December 13, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-12-13 13:15:00 UTC Message No. 6502 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report December 13, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS December 13, 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 Tue, Dec 13, 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 Tue, Dec 13, 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) 051209 - 051210 3 1 1884 Riga, Latvia 051212 - 051212 2 2 6810 Zimmerwald 846, Switzerland 051211 - 051212 7 4 7090 Yarragadee, Australia 051211 - 051212 3 3 7105 Greenbelt, Maryland 051212 - 051212 1 - 7237 Changchun, China 051211 - 051212 5 5 7501 Hartebeesthoek, SA (MOB-6) 051212 - 051212 1 - 7810 Zimmerwald 423, Switzerland 051211 - 051212 7 4 7824 San Fernando, Spain 051211 - 051212 2 2 7825 Mount Stromlo, Australia 051211 - 051212 2 1 7832 Riyad, Saudi Arabia 051211 - 051213 5 8 7838 Simosato Observatory, Japan 051212 - 051212 1 1 7839 Graz, Austria 051208 - 051212 5 5 7840 Herstmonceux, United Kingdom 051211 - 051212 5 4 7841 Potsdam, Germany 051212 - 051213 2 2 7941 Matera, Italy (MLRO 532) 051212 - 051212 2 1 8834 Wettzell, Germany 051211 - 051212 5 5 ------ ------ --- --- TOTAL 051208 - 051213 58 48 ------------------------------------------------------------------------------ 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 Mon, Dec 5, 2005 to Tue, Dec 13, 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 21 20 Number of Passes 194/193 181/181 Number of Normal Points 2202/2180 2198/2196 Weighted RMS of Fit (mm) 15 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 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 5 Dec 05 17:49 LAG2 8 0 66 -62 +- 337 3 +- 256 7 1864 5 Dec 05 20:53 LAG1 7 0 41 -16 +- 508 11 +- 278 18 1864 5 Dec 05 22:09 LAG2 5 0 77 -64 +- 319 24 +- 399 12 1864 6 Dec 05 15:49 LAG2 9 0 50 -36 +- 269 12 +- 200 6 1864 6 Dec 05 16:25 LAG1 4 0 13 -12 +- 475 3 +-1119 3 1864 8 Dec 05 13:37 LAG1 7 0 67 -64 +- 228 4 +- 133 12 1864 8 Dec 05 16:03 LAG2 11 0 79 -70 +- 190 10 +- 138 21 1864 8 Dec 05 17:09 LAG1 3 0 62 -32 +-1130 52 +-1918 0 1864 8 Dec 05 20:15 LAG2 7 0 57 -24 +- 242 22 +- 128 11 1864 8 Dec 05 20:31 LAG1 4 0 36 -5 +- 640 42 +- 924 10 1864 9 Dec 05 15:49 LAG1 6 0 61 -59 +- 254 6 +- 317 9 1864 10 Dec 05 14:27 LAG1 3 0 15 -7 +-4133 -9 +-2563 12 1864 10 Dec 05 16:19 LAG2 8 0 63 -54 +- 396 1 +- 284 28 1864 10 Dec 05 17:53 LAG1 4 0 49 -39 +- 704 12 +-1103 15 Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 10 Dec 05 02:41 LAG1 2 0 106 152 +-3339 -38 +-2715 0 Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 12 Dec 05 15:13 LAG1 19 0 13 4 +- 68 -5 +- 39 7 1884 12 Dec 05 16:39 LAG2 11 0 5 2 +- 125 -4 +- 115 4 1884 12 Dec 05 18:51 LAG1 15 0 13 -11 +- 80 6 +- 53 5 1884 12 Dec 05 20:31 LAG2 16 0 7 6 +- 77 -3 +- 60 3 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 6 Dec 05 13:13 LAG1 2 0 21 -19 +-1052 -6 +-2728 0 6810 10 Dec 05 14:37 LAG1 18 0 20 18 +- 44 -3 +- 29 10 6810 10 Dec 05 15:53 LAG2 5 0 19 48 +-1216 13 +- 567 3 6810 10 Dec 05 19:55 LAG2 21 0 6 -5 +- 40 -1 +- 21 3 6810 10 Dec 05 21:31 LAG1 2 0 20 90 +-4645 50 +-2122 0 6810 11 Dec 05 00:02 LAG2 25 0 8 5 +- 36 -2 +- 18 4 6810 11 Dec 05 00:57 LAG1 12 0 16 0 +- 52 -8 +- 26 2 6810 11 Dec 05 04:12 LAG2 12 0 8 5 +- 55 1 +- 49 6 6810 11 Dec 05 04:44 LAG1 8 0 10 4 +- 84 -9 +- 73 5 6810 11 Dec 05 13:07 LAG1 19 0 15 14 +- 42 2 +- 32 4 6810 11 Dec 05 14:13 LAG2 13 0 6 7 +- 67 3 +- 81 2 6810 11 Dec 05 16:35 LAG1 15 0 33 0 +- 48 13 +- 19 5 6810 11 Dec 05 17:57 LAG2 22 0 7 3 +- 39 2 +- 21 4 6810 11 Dec 05 20:09 LAG1 18 0 25 -11 +- 43 12 +- 25 3 6810 11 Dec 05 23:33 LAG1 9 0 22 -7 +- 207 7 +- 101 4 6810 12 Dec 05 15:56 LAG1 5 0 22 31 +-1402 -19 +- 511 5 6810 12 Dec 05 16:05 LAG2 25 0 13 -5 +- 36 -6 +- 21 4 6810 12 Dec 05 18:47 LAG1 17 0 21 -18 +- 45 3 +- 23 4 6810 12 Dec 05 20:15 LAG2 20 0 13 -6 +- 41 -6 +- 25 3 6810 12 Dec 05 22:18 LAG1 13 0 23 -20 +- 53 -3 +- 31 3 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 6 Dec 05 23:03 LAG2 17 0 14 14 +- 16 -5 +- 24 3 7080 7 Dec 05 00:15 LAG1 17 0 17 -5 +- 17 -7 +- 10 5 7080 8 Dec 05 05:13 LAG2 6 0 22 -20 +- 28 -3 +- 20 12 7080 8 Dec 05 09:01 LAG1 13 0 6 -4 +- 18 -3 +- 14 2 7080 8 Dec 05 09:44 LAG2 10 0 13 -5 +- 54 9 +- 31 4 7080 9 Dec 05 03:37 LAG2 7 0 18 -4 +- 118 -8 +- 75 2 7080 9 Dec 05 07:45 LAG2 7 0 10 -12 +- 41 4 +- 53 2 7080 9 Dec 05 07:57 LAG1 4 0 8 17 +- 164 -16 +- 112 1 7080 9 Dec 05 11:13 LAG1 10 0 8 -3 +- 20 -8 +- 24 3 7080 9 Dec 05 11:35 LAG2 12 0 15 14 +- 19 6 +- 23 6 7080 10 Dec 05 05:39 LAG2 16 0 23 -15 +- 22 -7 +- 18 4 7080 10 Dec 05 06:27 LAG1 4 0 18 -18 +- 59 -1 +- 125 3 7080 10 Dec 05 09:35 LAG2 9 0 7 0 +- 36 3 +- 24 5 7080 10 Dec 05 09:57 LAG1 10 0 17 5 +- 33 -14 +- 23 2 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 5 Dec 05 05:25 LAG2 14 0 7 -8 +- 15 2 +- 14 2 7090 5 Dec 05 07:33 LAG1 14 0 14 -9 +- 11 6 +- 6 3 7090 5 Dec 05 09:26 LAG2 7 0 9 7 +- 17 -7 +- 14 2 7090 6 Dec 05 03:01 LAG1 5 0 24 23 +- 18 4 +- 55 6 7090 6 Dec 05 03:21 LAG2 13 0 7 7 +- 13 -9 +- 18 2 7090 6 Dec 05 06:23 LAG1 2 0 19 -6 +- 127 24 +- 239 0 7090 6 Dec 05 19:05 LAG1 10 0 14 -10 +- 40 -2 +- 22 1 7090 6 Dec 05 21:19 LAG2 5 0 9 -11 +- 42 3 +- 54 1 7090 7 Dec 05 01:18 LAG2 5 0 8 -8 +- 18 -4 +- 54 3 7090 7 Dec 05 05:04 LAG1 10 0 8 -12 +- 22 4 +- 17 1 7090 7 Dec 05 05:27 LAG2 23 0 7 1 +- 8 -5 +- 6 4 7090 7 Dec 05 08:27 LAG1 15 0 10 -4 +- 12 7 +- 7 1 7090 7 Dec 05 09:37 LAG2 17 0 18 -4 +- 11 -15 +- 11 2 7090 7 Dec 05 17:33 LAG1 7 0 5 -6 +- 17 3 +- 42 1 7090 7 Dec 05 19:16 LAG2 12 0 5 1 +- 13 2 +- 12 3 7090 7 Dec 05 20:52 LAG1 20 0 11 -9 +- 9 -1 +- 5 3 7090 7 Dec 05 23:13 LAG2 6 0 13 -19 +- 47 -6 +- 43 2 7090 8 Dec 05 00:20 LAG1 11 0 5 3 +- 13 0 +- 14 3 7090 8 Dec 05 03:30 LAG2 13 0 5 0 +- 11 4 +- 15 4 7090 8 Dec 05 06:55 LAG1 15 0 20 -8 +- 10 9 +- 5 4 7090 8 Dec 05 07:35 LAG2 20 0 8 -8 +- 9 0 +- 7 1 7090 8 Dec 05 19:35 LAG1 21 0 14 -15 +- 10 5 +- 5 4 7090 8 Dec 05 21:19 LAG2 12 0 7 -4 +- 12 3 +- 12 3 7090 8 Dec 05 23:01 LAG1 8 0 5 2 +- 16 0 +- 12 4 7090 9 Dec 05 01:31 LAG2 16 0 7 2 +- 12 -5 +- 12 5 7090 9 Dec 05 05:45 LAG2 15 0 14 -7 +- 11 -5 +- 6 3 7090 9 Dec 05 06:03 LAG1 7 0 7 -15 +- 102 9 +- 44 2 7090 9 Dec 05 09:11 LAG1 9 0 14 -11 +- 22 3 +- 23 1 7090 9 Dec 05 09:56 LAG2 13 0 8 8 +- 17 -14 +- 19 2 7090 9 Dec 05 18:11 LAG1 16 0 3 -2 +- 10 0 +- 9 2 7090 9 Dec 05 19:23 LAG2 14 0 19 -10 +- 11 12 +- 9 1 7090 9 Dec 05 21:39 LAG1 17 0 7 -4 +- 10 -3 +- 5 2 7090 9 Dec 05 23:31 LAG2 10 0 6 -3 +- 13 5 +- 17 3 7090 10 Dec 05 01:13 LAG1 5 0 21 20 +- 19 -6 +- 56 3 7090 10 Dec 05 03:55 LAG2 14 0 7 5 +- 15 -5 +- 15 5 7090 10 Dec 05 04:33 LAG1 11 0 5 0 +- 23 4 +- 16 3 7090 11 Dec 05 06:27 LAG2 5 0 4 -4 +- 169 0 +- 92 2 7090 11 Dec 05 06:37 LAG1 3 0 8 -8 +- 34 -3 +- 112 1 7090 11 Dec 05 22:45 LAG1 10 0 6 3 +- 29 0 +- 19 3 7090 11 Dec 05 23:49 LAG2 12 0 5 -6 +- 15 5 +- 16 2 7090 12 Dec 05 03:59 LAG2 15 0 4 1 +- 10 1 +- 10 3 7090 12 Dec 05 05:13 LAG1 14 0 5 0 +- 14 3 +- 9 2 7090 12 Dec 05 08:27 LAG2 6 0 12 -10 +- 60 -1 +- 52 1 7090 12 Dec 05 08:39 LAG1 5 0 8 -14 +- 65 -5 +- 58 0 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 10 Dec 05 01:19 LAG2 17 0 3 -1 +- 10 0 +- 5 1 7105 10 Dec 05 02:47 LAG1 13 0 23 -6 +- 13 -13 +- 8 4 7105 10 Dec 05 05:29 LAG2 20 0 17 -15 +- 9 -3 +- 5 3 7105 10 Dec 05 06:25 LAG1 11 0 33 -6 +- 24 -13 +- 12 3 7105 12 Dec 05 07:27 LAG1 3 0 56 37 +- 451 -38 +- 185 0 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 7 Dec 05 07:01 LAG1 14 0 22 -20 +- 11 -3 +- 10 1 7110 7 Dec 05 07:27 LAG2 4 0 31 -30 +- 77 0 +- 94 2 7110 7 Dec 05 10:16 LAG1 10 0 6 -16 +- 35 -6 +- 18 2 7110 7 Dec 05 11:13 LAG2 13 0 16 -12 +- 11 6 +- 6 3 7110 7 Dec 05 23:03 LAG1 13 0 9 6 +- 18 -8 +- 11 2 7110 8 Dec 05 01:27 LAG2 7 0 12 0 +- 139 -5 +- 64 0 7110 8 Dec 05 08:57 LAG1 12 0 14 -14 +- 12 0 +- 5 2 7110 8 Dec 05 09:37 LAG2 8 0 9 -16 +- 30 8 +- 25 3 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 5 Dec 05 10:03 LAG2 12 0 30 7 +- 59 -19 +- 46 4 7237 5 Dec 05 10:28 LAG1 6 0 24 17 +- 65 -9 +- 57 4 7237 5 Dec 05 17:15 LAG1 16 0 8 4 +- 39 2 +- 24 6 7237 5 Dec 05 18:31 LAG2 11 0 37 -4 +- 66 -22 +- 45 7 7237 6 Dec 05 09:05 LAG1 12 0 57 56 +- 44 -2 +- 31 4 7237 6 Dec 05 12:09 LAG2 14 0 70 43 +- 43 -29 +- 31 6 7237 6 Dec 05 12:35 LAG1 3 0 65 75 +- 414 10 +- 426 1 7237 6 Dec 05 15:57 LAG1 11 0 22 22 +- 52 -3 +- 36 7 7237 6 Dec 05 16:27 LAG2 14 0 18 11 +- 47 -11 +- 29 8 7237 6 Dec 05 19:27 LAG1 16 0 47 49 +- 41 -7 +- 28 5 7237 6 Dec 05 20:36 LAG2 4 0 41 44 +- 88 -27 +- 270 8 7237 7 Dec 05 10:15 LAG2 18 0 37 12 +- 36 -22 +- 24 4 7237 7 Dec 05 11:13 LAG1 12 0 32 30 +- 44 -6 +- 39 6 7237 7 Dec 05 14:37 LAG2 3 0 30 -3 +- 268 -51 +- 428 6 7237 7 Dec 05 14:43 LAG1 6 0 17 10 +- 74 5 +- 65 8 7237 7 Dec 05 17:55 LAG1 15 0 13 14 +- 48 2 +- 29 5 7237 7 Dec 05 18:45 LAG2 10 0 12 4 +- 75 -11 +- 64 7 7237 8 Dec 05 16:31 LAG2 8 0 48 8 +- 55 -18 +- 23 9 7237 8 Dec 05 16:39 LAG1 23 0 18 11 +- 31 8 +- 22 7 7237 8 Dec 05 20:11 LAG1 9 0 14 14 +- 57 5 +- 48 7 7237 10 Dec 05 16:45 LAG2 10 0 59 23 +- 48 -25 +- 23 9 7237 10 Dec 05 17:29 LAG1 16 0 13 10 +- 40 2 +- 23 4 7237 10 Dec 05 20:59 LAG2 5 0 47 46 +- 68 -34 +- 236 10 7237 10 Dec 05 21:09 LAG1 3 0 22 44 +- 554 29 +- 723 2 7237 11 Dec 05 12:53 LAG1 8 0 27 29 +- 75 -6 +- 69 9 7237 11 Dec 05 14:53 LAG2 14 0 29 20 +- 40 -12 +- 26 8 7237 11 Dec 05 16:02 LAG1 15 0 13 11 +- 40 0 +- 25 7 7237 11 Dec 05 19:08 LAG2 5 0 40 32 +- 69 -24 +- 163 19 7237 12 Dec 05 08:55 LAG2 16 0 33 31 +- 42 1 +- 31 9 7237 12 Dec 05 11:21 LAG1 9 0 79 41 +- 53 -31 +- 31 9 7237 12 Dec 05 12:55 LAG2 9 0 25 20 +- 51 -9 +- 36 9 7237 12 Dec 05 14:46 LAG1 6 0 17 16 +- 69 -9 +- 50 5 7237 12 Dec 05 17:01 LAG2 6 0 59 14 +- 67 -24 +- 31 3 7237 12 Dec 05 18:21 LAG1 8 0 28 26 +- 54 -4 +- 59 6 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 5 Dec 05 10:05 LAG2 12 0 9 8 +- 49 -3 +- 41 5 7249 5 Dec 05 10:35 LAG1 10 0 18 -1 +- 54 -6 +- 39 16 7249 5 Dec 05 14:11 LAG2 11 0 19 -2 +- 46 -13 +- 52 15 7249 5 Dec 05 17:24 LAG1 11 0 22 18 +- 72 1 +- 43 10 7249 5 Dec 05 18:35 LAG2 12 0 23 -1 +- 112 11 +- 62 12 7249 5 Dec 05 20:45 LAG1 17 0 20 -1 +- 37 12 +- 30 13 7249 5 Dec 05 22:16 LAG2 7 0 55 -58 +- 106 -109 +- 153 36 7249 6 Dec 05 12:11 LAG2 13 0 24 -22 +- 43 -16 +- 44 5 7249 6 Dec 05 12:37 LAG1 12 0 14 -6 +- 44 7 +- 38 11 7249 6 Dec 05 15:55 LAG1 12 0 14 -2 +- 44 -9 +- 37 8 7249 6 Dec 05 16:22 LAG2 11 0 19 -13 +- 46 8 +- 30 7 7249 6 Dec 05 19:19 LAG1 18 0 9 1 +- 36 -2 +- 21 8 7249 6 Dec 05 20:29 LAG2 13 0 10 0 +- 45 -3 +- 37 9 7249 7 Dec 05 10:25 LAG2 12 0 15 1 +- 61 -8 +- 42 11 7249 7 Dec 05 11:19 LAG1 11 0 15 12 +- 46 0 +- 46 8 7249 7 Dec 05 14:19 LAG2 10 0 9 -3 +- 81 -5 +- 65 7 7249 7 Dec 05 18:06 LAG1 11 0 16 -3 +- 49 9 +- 31 8 7249 7 Dec 05 18:46 LAG2 6 0 20 -3 +- 112 17 +- 121 14 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 7 Dec 05 00:49 LAG2 7 0 7 -10 +- 25 8 +- 47 1 7501 7 Dec 05 04:43 LAG2 8 0 7 0 +- 16 6 +- 15 3 7501 8 Dec 05 00:49 LAG1 12 0 2 0 +- 14 0 +- 10 2 7501 8 Dec 05 03:09 LAG2 5 0 23 1 +- 277 10 +- 136 2 7501 12 Dec 05 02:21 LAG1 7 0 12 12 +- 46 11 +- 21 2 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 6 Dec 05 13:13 LAG1 3 0 13 -20 +- 300 10 +- 426 0 7810 10 Dec 05 14:39 LAG1 14 0 4 1 +- 49 0 +- 41 4 7810 10 Dec 05 15:54 LAG2 4 0 16 173 +-1382 77 +- 658 5 7810 10 Dec 05 20:02 LAG2 17 0 15 -13 +- 44 -4 +- 26 4 7810 10 Dec 05 21:31 LAG1 3 0 31 -3 +-2018 12 +- 954 3 7810 11 Dec 05 00:04 LAG2 20 0 14 -11 +- 41 -3 +- 22 5 7810 11 Dec 05 00:57 LAG1 11 0 20 -14 +- 55 -8 +- 29 4 7810 11 Dec 05 04:13 LAG2 8 0 10 -6 +- 65 -2 +- 66 8 7810 11 Dec 05 04:45 LAG1 6 0 25 -14 +- 85 -15 +- 90 4 7810 11 Dec 05 13:05 LAG1 17 0 9 -5 +- 46 4 +- 38 4 7810 11 Dec 05 14:15 LAG2 9 0 16 -13 +- 100 -12 +- 130 13 7810 11 Dec 05 16:37 LAG1 13 0 30 -19 +- 52 12 +- 21 4 7810 11 Dec 05 18:01 LAG2 18 0 15 -14 +- 43 2 +- 27 2 7810 11 Dec 05 20:09 LAG1 19 0 34 -28 +- 42 11 +- 23 4 7810 11 Dec 05 23:31 LAG1 9 0 18 -1 +- 253 7 +- 113 1 7810 12 Dec 05 15:57 LAG1 2 0 23 -228 +-7825 80 +-3048 0 7810 12 Dec 05 16:19 LAG2 17 0 23 -9 +- 53 -12 +- 38 4 7810 12 Dec 05 18:49 LAG1 16 0 30 -29 +- 47 1 +- 26 2 7810 12 Dec 05 20:17 LAG2 18 0 24 -20 +- 43 -6 +- 29 4 7810 12 Dec 05 22:18 LAG1 7 0 38 -37 +- 83 0 +- 45 6 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 8 Dec 05 01:27 LAG1 6 0 76 83 +- 289 3 +- 125 1 7824 8 Dec 05 02:27 LAG2 3 0 67 137 +-1374 -28 +- 570 0 7824 8 Dec 05 20:01 LAG2 7 0 81 95 +- 139 -12 +- 114 5 7824 8 Dec 05 23:49 LAG2 15 0 65 70 +- 47 5 +- 35 3 7824 9 Dec 05 20:01 LAG1 4 0 70 73 +- 506 -1 +- 268 5 7824 9 Dec 05 21:47 LAG2 18 0 67 69 +- 30 8 +- 25 7 7824 9 Dec 05 23:01 LAG1 6 0 54 54 +- 78 0 +- 103 5 7824 10 Dec 05 02:05 LAG2 4 0 61 69 +- 780 4 +- 389 2 7824 10 Dec 05 02:21 LAG1 4 0 107 132 +- 464 13 +- 244 0 7824 10 Dec 05 19:59 LAG2 15 0 79 79 +- 31 -5 +- 30 4 7824 11 Dec 05 01:05 LAG1 5 0 78 69 +- 118 -9 +- 118 5 7824 11 Dec 05 18:33 LAG2 3 0 62 103 +-1482 -19 +- 701 2 7824 11 Dec 05 20:29 LAG1 5 0 36 46 +- 88 26 +- 153 8 7824 12 Dec 05 19:07 LAG1 8 0 81 83 +- 47 48 +- 43 23 7824 12 Dec 05 20:13 LAG2 19 0 46 50 +- 30 -14 +- 22 7 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 5 Dec 05 03:55 LAG1 12 0 8 -1 +- 12 -3 +- 7 6 7825 5 Dec 05 05:37 LAG2 17 0 8 11 +- 15 -6 +- 10 5 7825 5 Dec 05 16:17 LAG1 21 0 3 -2 +- 9 0 +- 6 2 7825 5 Dec 05 19:09 LAG2 11 0 15 -8 +- 12 8 +- 9 2 7825 5 Dec 05 20:09 LAG1 12 0 8 -11 +- 22 3 +- 13 3 7825 6 Dec 05 17:39 LAG2 7 0 24 32 +- 55 -8 +- 48 4 7825 6 Dec 05 18:25 LAG1 12 0 10 2 +- 13 -4 +- 5 5 7825 7 Dec 05 04:45 LAG1 19 0 13 3 +- 10 2 +- 5 11 7825 7 Dec 05 17:05 LAG1 15 0 12 -10 +- 13 0 +- 7 6 7825 7 Dec 05 19:13 LAG2 23 0 3 0 +- 9 0 +- 5 3 7825 7 Dec 05 20:43 LAG1 18 0 5 -3 +- 10 2 +- 6 4 7825 7 Dec 05 23:23 LAG2 18 0 11 6 +- 10 -3 +- 7 7 7825 8 Dec 05 03:25 LAG1 9 1 7 0 +- 15 1 +- 8 7 7825 8 Dec 05 03:35 LAG2 19 3 11 7 +- 10 -1 +- 5 8 7825 8 Dec 05 15:47 LAG1 18 0 8 -1 +- 9 6 +- 9 4 7825 8 Dec 05 17:29 LAG2 16 0 9 8 +- 10 0 +- 8 4 7825 8 Dec 05 19:13 LAG1 19 0 15 -11 +- 9 4 +- 4 5 7825 8 Dec 05 21:21 LAG2 14 0 5 -9 +- 24 -4 +- 14 2 7825 8 Dec 05 22:49 LAG1 11 0 17 -1 +- 12 -2 +- 12 17 7825 9 Dec 05 05:35 LAG1 8 0 7 2 +- 15 4 +- 9 1 7825 9 Dec 05 06:13 LAG2 11 0 6 7 +- 39 -1 +- 25 3 7825 9 Dec 05 18:16 LAG1 11 0 12 -26 +- 31 14 +- 15 4 7825 9 Dec 05 19:33 LAG2 14 0 14 0 +- 11 7 +- 7 6 7825 9 Dec 05 21:26 LAG1 17 2 4 0 +- 11 1 +- 9 4 7825 10 Dec 05 01:03 LAG1 6 2 12 -4 +- 85 15 +- 81 1 7825 10 Dec 05 04:11 LAG1 13 0 6 2 +- 11 -1 +- 5 4 7825 10 Dec 05 04:37 LAG2 2 0 14 -99 +-2583 50 +-1149 0 7825 10 Dec 05 21:37 LAG2 25 0 8 4 +- 8 -3 +- 5 5 7825 10 Dec 05 23:31 LAG1 11 1 36 -18 +- 13 -16 +- 16 30 7825 11 Dec 05 02:46 LAG1 17 5 10 8 +- 12 -2 +- 9 6 7825 11 Dec 05 22:13 LAG1 15 0 12 5 +- 10 10 +- 10 4 7825 11 Dec 05 23:57 LAG2 11 0 6 -4 +- 25 -3 +- 22 5 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 5 Dec 05 00:00 LAG2 6 0 5 4 +- 61 0 +- 57 1 7832 5 Dec 05 01:47 LAG1 8 0 8 -14 +- 53 -13 +- 43 4 7832 5 Dec 05 11:07 LAG1 5 0 29 30 +- 49 -1 +- 67 4 7832 5 Dec 05 13:45 LAG2 6 0 16 -12 +- 39 -8 +- 64 1 7832 5 Dec 05 14:41 LAG1 7 0 6 -13 +- 62 9 +- 42 3 7832 5 Dec 05 17:37 LAG2 11 0 6 -6 +- 29 -1 +- 33 4 7832 5 Dec 05 21:03 LAG1 13 0 8 7 +- 18 0 +- 18 2 7832 5 Dec 05 21:57 LAG2 10 0 6 -11 +- 46 -5 +- 36 3 7832 6 Dec 05 00:21 LAG1 11 0 7 7 +- 38 2 +- 22 5 7832 6 Dec 05 02:04 LAG2 11 0 23 15 +- 22 -12 +- 25 4 7832 7 Dec 05 13:55 LAG2 7 0 16 -13 +- 28 -3 +- 33 4 7832 7 Dec 05 15:13 LAG1 7 0 7 4 +- 48 8 +- 45 5 7832 7 Dec 05 17:51 LAG2 9 0 8 -12 +- 55 -5 +- 52 3 7832 10 Dec 05 02:09 LAG1 6 0 28 20 +- 37 -18 +- 74 3 7832 10 Dec 05 02:37 LAG2 6 0 32 33 +- 33 1 +- 77 2 7832 10 Dec 05 11:17 LAG1 9 0 13 15 +- 26 -16 +- 30 1 7832 10 Dec 05 12:21 LAG2 8 0 20 7 +- 46 15 +- 50 1 7832 10 Dec 05 14:49 LAG1 9 0 14 -4 +- 31 -9 +- 28 4 7832 10 Dec 05 16:07 LAG2 7 0 6 -2 +- 84 2 +- 70 4 7832 10 Dec 05 20:35 LAG2 14 0 7 5 +- 18 1 +- 21 3 7832 10 Dec 05 21:13 LAG1 13 0 5 2 +- 18 4 +- 17 2 7832 11 Dec 05 00:35 LAG2 7 0 16 8 +- 97 -5 +- 60 1 7832 11 Dec 05 13:25 LAG1 6 0 10 -8 +- 27 -1 +- 22 6 7832 11 Dec 05 14:07 LAG2 6 0 25 5 +- 173 17 +- 97 2 7832 11 Dec 05 18:21 LAG2 2 0 13 -194 +-2043 -115 +-1298 0 7832 11 Dec 05 22:37 LAG2 10 0 9 27 +- 65 16 +- 37 2 7832 11 Dec 05 23:13 LAG1 11 0 7 -3 +- 39 1 +- 22 3 7832 12 Dec 05 02:53 LAG2 6 0 1 0 +- 27 0 +- 93 1 7832 12 Dec 05 12:05 LAG1 10 0 22 -3 +- 28 -10 +- 15 4 7832 12 Dec 05 12:35 LAG2 6 0 9 0 +- 60 11 +- 70 1 7832 12 Dec 05 16:15 LAG2 11 0 16 -24 +- 32 -14 +- 24 6 7832 12 Dec 05 20:57 LAG2 11 0 5 -3 +- 26 -1 +- 29 3 7832 12 Dec 05 21:55 LAG1 9 0 8 -15 +- 49 -8 +- 32 3 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 5 Dec 05 06:47 LAG1 20 0 36 30 +- 21 -8 +- 10 6 7838 5 Dec 05 09:57 LAG2 21 0 40 39 +- 21 10 +- 13 6 7838 5 Dec 05 14:14 LAG2 15 0 36 36 +- 25 3 +- 24 5 7838 5 Dec 05 17:02 LAG1 16 0 49 50 +- 24 7 +- 15 2 7838 6 Dec 05 05:29 LAG1 10 0 37 50 +- 63 12 +- 45 10 7838 6 Dec 05 08:19 LAG2 14 0 50 56 +- 31 -10 +- 26 4 7838 6 Dec 05 09:03 LAG1 17 0 29 28 +- 23 1 +- 15 3 7838 6 Dec 05 12:19 LAG2 16 0 29 28 +- 24 5 +- 24 4 7838 6 Dec 05 15:47 LAG1 15 0 70 71 +- 25 -3 +- 16 8 7838 6 Dec 05 16:27 LAG2 17 0 44 47 +- 24 11 +- 17 6 7838 6 Dec 05 19:17 LAG1 18 0 15 12 +- 23 4 +- 17 3 7838 7 Dec 05 07:38 LAG1 22 0 36 32 +- 20 -10 +- 10 5 7838 7 Dec 05 10:07 LAG2 18 0 39 42 +- 25 5 +- 17 5 7838 7 Dec 05 14:39 LAG2 13 0 51 49 +- 26 6 +- 26 5 7838 7 Dec 05 17:46 LAG1 18 0 31 32 +- 23 8 +- 14 2 7838 7 Dec 05 18:36 LAG2 17 0 16 16 +- 23 0 +- 17 5 7838 8 Dec 05 06:17 LAG1 22 0 34 34 +- 20 -4 +- 11 6 7838 8 Dec 05 08:18 LAG2 21 0 49 44 +- 20 12 +- 13 7 7838 8 Dec 05 09:47 LAG1 19 0 32 29 +- 22 -9 +- 14 6 7838 8 Dec 05 12:33 LAG2 13 0 41 41 +- 26 10 +- 30 8 7838 8 Dec 05 16:39 LAG2 18 0 44 44 +- 23 8 +- 14 4 7838 8 Dec 05 20:07 LAG1 12 0 24 -8 +- 27 22 +- 30 8 7838 9 Dec 05 04:57 LAG1 16 0 40 38 +- 24 -9 +- 22 4 7838 9 Dec 05 14:46 LAG2 13 0 49 49 +- 36 0 +- 31 8 7838 9 Dec 05 15:19 LAG1 10 0 51 50 +- 32 3 +- 32 4 7838 9 Dec 05 18:45 LAG1 8 0 18 24 +- 45 14 +- 49 1 7838 10 Dec 05 07:05 LAG1 15 0 51 37 +- 25 -13 +- 14 6 7838 12 Dec 05 07:58 LAG1 14 0 35 22 +- 25 -19 +- 18 5 7838 12 Dec 05 08:45 LAG2 6 0 16 51 +- 131 30 +- 76 4 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 8 Dec 05 19:55 LAG2 13 0 7 0 +- 11 5 +- 8 1 7839 8 Dec 05 20:51 LAG1 10 0 6 1 +- 15 4 +- 11 1 7839 10 Dec 05 19:59 LAG2 24 0 2 0 +- 8 -1 +- 4 1 7839 10 Dec 05 21:33 LAG1 12 0 4 -3 +- 13 1 +- 7 2 7839 11 Dec 05 00:07 LAG2 24 0 5 0 +- 8 -2 +- 4 0 7839 11 Dec 05 00:51 LAG1 15 0 11 -4 +- 10 -6 +- 5 1 7839 11 Dec 05 20:07 LAG1 14 0 27 -14 +- 11 12 +- 6 1 7839 11 Dec 05 22:09 LAG2 22 0 12 2 +- 8 6 +- 4 1 7839 11 Dec 05 23:27 LAG1 27 0 11 -3 +- 8 5 +- 3 2 7839 12 Dec 05 02:17 LAG2 18 0 5 4 +- 10 0 +- 5 2 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 6 Dec 05 23:35 LAG1 11 0 18 3 +- 22 -11 +- 14 2 7840 6 Dec 05 23:41 LAG2 17 0 11 0 +- 17 -6 +- 10 3 7840 7 Dec 05 02:55 LAG1 18 0 21 7 +- 15 -11 +- 9 4 7840 8 Dec 05 16:09 LAG2 5 0 3 4 +- 47 -5 +- 101 1 7840 8 Dec 05 17:15 LAG1 6 0 17 22 +- 84 16 +- 37 2 7840 8 Dec 05 19:49 LAG2 19 0 10 4 +- 15 5 +- 10 4 7840 8 Dec 05 20:51 LAG1 17 0 7 4 +- 16 3 +- 10 3 7840 8 Dec 05 23:53 LAG2 19 0 6 4 +- 15 0 +- 8 4 7840 9 Dec 05 00:15 LAG1 11 0 6 3 +- 21 -2 +- 10 4 7840 9 Dec 05 03:47 LAG1 12 0 8 -2 +- 19 -6 +- 13 2 7840 9 Dec 05 03:55 LAG2 10 0 4 -3 +- 20 -1 +- 17 1 7840 9 Dec 05 17:57 LAG2 11 0 7 6 +- 20 0 +- 15 3 7840 9 Dec 05 19:43 LAG1 9 0 2 -3 +- 37 1 +- 28 1 7840 9 Dec 05 21:59 LAG2 21 0 12 4 +- 14 6 +- 9 3 7840 9 Dec 05 22:53 LAG1 17 0 9 3 +- 16 -4 +- 10 4 7840 10 Dec 05 02:03 LAG2 12 0 9 1 +- 20 5 +- 12 2 7840 10 Dec 05 02:19 LAG1 15 0 23 -1 +- 17 -10 +- 7 4 7840 10 Dec 05 14:33 LAG1 17 0 12 11 +- 16 -2 +- 12 2 7840 10 Dec 05 16:15 LAG2 9 0 4 0 +- 22 -7 +- 37 1 7840 10 Dec 05 18:03 LAG1 17 0 7 -2 +- 16 2 +- 7 4 7840 10 Dec 05 19:57 LAG2 20 0 4 3 +- 14 0 +- 8 2 7840 10 Dec 05 21:35 LAG1 17 0 5 -3 +- 16 -2 +- 9 1 7840 11 Dec 05 00:11 LAG2 20 0 7 2 +- 15 -4 +- 10 1 7840 11 Dec 05 00:59 LAG1 13 0 12 0 +- 20 -6 +- 10 3 7840 11 Dec 05 04:09 LAG2 12 0 4 -3 +- 19 -1 +- 19 1 7840 11 Dec 05 04:43 LAG1 13 0 9 -6 +- 18 -5 +- 18 2 7840 11 Dec 05 16:43 LAG1 15 0 20 2 +- 17 9 +- 8 2 7840 11 Dec 05 18:01 LAG2 23 0 12 6 +- 13 6 +- 8 3 7840 11 Dec 05 20:15 LAG1 14 0 19 -8 +- 17 10 +- 10 3 7840 11 Dec 05 22:09 LAG2 17 0 13 3 +- 16 7 +- 9 4 7840 11 Dec 05 23:37 LAG1 18 0 10 2 +- 15 5 +- 8 4 7840 12 Dec 05 02:13 LAG2 16 0 4 3 +- 16 1 +- 9 2 7840 12 Dec 05 03:13 LAG1 18 0 8 -5 +- 15 -3 +- 9 2 7840 12 Dec 05 15:21 LAG1 19 0 18 11 +- 15 -8 +- 9 4 7840 12 Dec 05 16:19 LAG2 16 0 9 6 +- 16 -5 +- 15 2 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 9 Dec 05 18:18 LAG2 9 1 6 -16 +- 50 9 +- 28 4 7841 12 Dec 05 18:57 LAG1 11 0 6 3 +- 12 -2 +- 11 5 7841 12 Dec 05 20:26 LAG2 13 0 10 2 +- 12 -1 +- 7 10 7841 12 Dec 05 22:13 LAG1 20 0 5 -2 +- 9 0 +- 5 4 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 6 Dec 05 13:01 LAG1 14 0 10 -6 +- 11 7 +- 11 3 7941 6 Dec 05 20:01 LAG2 9 0 4 -8 +- 46 3 +- 24 3 7941 6 Dec 05 23:21 LAG1 7 0 6 3 +- 39 -2 +- 27 1 7941 6 Dec 05 23:55 LAG2 7 0 3 -2 +- 32 -4 +- 30 1 7941 7 Dec 05 13:53 LAG2 6 0 15 -1 +- 35 -30 +- 63 1 7941 7 Dec 05 15:07 LAG1 13 0 6 0 +- 15 3 +- 8 4 7941 7 Dec 05 17:37 LAG2 25 0 7 -5 +- 8 0 +- 5 4 7941 7 Dec 05 18:37 LAG1 15 0 8 5 +- 11 5 +- 8 4 7941 7 Dec 05 21:47 LAG2 13 0 4 -1 +- 12 0 +- 6 4 7941 8 Dec 05 01:27 LAG1 7 0 10 8 +- 53 -1 +- 29 1 7941 8 Dec 05 01:57 LAG2 22 0 3 -1 +- 9 -1 +- 5 2 7941 12 Dec 05 15:17 LAG1 14 0 20 7 +- 11 -8 +- 5 2 7941 12 Dec 05 16:05 LAG2 12 0 8 -2 +- 21 -5 +- 12 1 7941 12 Dec 05 18:53 LAG1 2 0 17 1 +- 954 9 +- 505 0 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 5 Dec 05 17:24 LAG2 9 0 16 -19 +- 50 -2 +- 28 1 8834 5 Dec 05 17:51 LAG1 7 0 28 -19 +- 55 4 +- 31 5 8834 8 Dec 05 17:23 LAG1 10 0 21 -15 +- 13 10 +- 11 3 8834 8 Dec 05 19:51 LAG2 8 0 17 -18 +- 40 0 +- 25 3 8834 11 Dec 05 00:19 LAG2 19 0 11 -3 +- 11 -5 +- 7 6 8834 11 Dec 05 13:15 LAG1 9 0 5 -4 +- 15 -1 +- 11 2 8834 11 Dec 05 14:33 LAG2 8 0 5 -6 +- 26 1 +- 35 2 8834 11 Dec 05 22:15 LAG2 11 0 15 -4 +- 12 7 +- 7 5 8834 12 Dec 05 02:21 LAG2 7 0 10 -9 +- 18 1 +- 13 2 8834 12 Dec 05 03:11 LAG1 14 0 11 -7 +- 11 -4 +- 9 7 8834 12 Dec 05 11:49 LAG1 4 0 8 -4 +- 47 -29 +- 117 0 8834 12 Dec 05 15:41 LAG1 3 0 7 -2 +- 130 -4 +- 130 3 8834 12 Dec 05 16:51 LAG2 4 0 23 10 +- 252 -16 +- 125 0 8834 12 Dec 05 18:59 LAG1 3 0 20 -27 +- 104 -7 +- 99 1 8834 12 Dec 05 20:31 LAG2 5 0 10 -6 +- 21 6 +- 28 2 -------------------------------------------------------------------------------- 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 051005 - 051102 0/ 9/ 0 0/ 3/ 0 12 1831 LVIL 050703 - 051103 0/ 68/ 0 0/ 15/ 0 83 1864 MD2LAS 050701 - 051210 0/118/ 0 0/ 49/ 0 167 1873 SIMLAS 050701 - 051210 0/ 57/ 0 0/ 11/ 0 68 1884 RIGLAS 050703 - 051212 0/ 96/ 0 0/ 24/ 0 120 1893 CRMLAS 050723 - 051013 0/ 17/ 0 0/ 0/ 0 17 6405 TIGO 050705 - 051201 48/ 12/ 3 43/ 32/ 3 141 6810 ZIMLAT 050701 - 051212 104/212/ 22 143/115/ 18 614 7080 MLRS25 050701 - 051210 7/ 72/ 2 10/ 57/ 3 151 7090 ML0514 050701 - 051212 167/143/ 31 134/213/ 18 706 7105 ML0725 050704 - 051212 13/ 93/ 10 21/ 53/ 7 197 7110 ML0414 050701 - 051208 47/177/ 26 52/ 88/ 8 398 7124 ML0819 050818 - 051102 1/ 14/ 2 1/ 32/ 1 51 7130 TL04** 050803 - 051103 8/ 26/ 1 12/ 10/ 2 59 7237 CHALAS 050410 - 051212 0/166/ 2 0/110/ 0 278 7249 BEJLAS 050703 - 051207 0/ 92/ 0 0/ 60/ 0 152 7355 TROS02 050701 - 050906 0/ 24/ 0 0/ 0/ 0 24 7358 GMSL 050802 - 051129 7/ 16/ 0 2/ 8/ 0 33 7405 TIGO 050705 - 051107 2/ 5/ 0 0/ 9/ 0 16 7501 ML0616 050701 - 051212 18/ 43/ 5 10/ 64/ 3 143 7810 ZIMLAT 050701 - 051212 103/209/ 22 144/113/ 19 610 7811 POLLAS 050704 - 051201 0/ 88/ 0 0/ 23/ 0 111 7824 SPNLAS 050701 - 051212 10/150/ 8 10/ 77/ 7 262 7825 STL3 050702 - 051212 275/106/ 21 135/169/ 20 726 7832 SALRO 050702 - 051213 86/212/ 24 100/151/ 18 591 7835 GRASSE 050701 - 050705 0/ 3/ 0 0/ 2/ 0 5 7838 SHOLAS 050714 - 051212 20/ 96/ 7 19/ 73/ 4 219 7839 AUSLAS 050702 - 051212 53/128/ 21 95/ 52/ 4 353 7840 RGOLAS 050702 - 051212 72/215/ 25 109/ 93/ 11 525 7841 GFZLA3 050713 - 051213 8/ 87/ 8 7/ 32/ 2 144 7848 FTLR06 050515 - 051027 6/ 48/ 2 5/ 22/ 4 87 7941 MLROnn 050701 - 051212 47/135/ 12 65/ 57/ 10 326 8834 WLRS01 050702 - 051212 81/169/ 27 111/ 82/ 11 481 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 051206.0 66.3 +/- 0.1 391.6 +/- 0.1 -32703.74 +/- 0.02 051207.0 66.2 +/- 0.1 391.2 +/- 0.1 -32704.45 +/- 0.03 051208.0 66.2 +/- 0.1 391.0 +/- 0.1 -32705.42 +/- 0.04 051209.0 65.9 +/- 0.1 390.8 +/- 0.1 -32706.52 +/- 0.05 051210.0 64.9 +/- 0.1 390.4 +/- 0.1 -32707.59 +/- 0.05 051211.0 64.2 +/- 0.1 388.9 +/- 0.1 -32708.53 +/- 0.06 051212.0 63.5 +/- 0.1 388.0 +/- 0.1 -32709.34 +/- 0.07 -------------------------------------------------------------- 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 ******************************************************************************** |