| Date: | 2004-12-11 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4652: Delft QL Report December 11, 2004 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2004-12-11 13:15:00 UTC Message No. 4652 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report December 11, 2004 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS December 11, 2004 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, Dec 11, 2004. Questions and comments should be addressed to: R. Noomen Delft University of Technology Faculty of Aerospace Engineering Delft Institute for Earth-Oriented Space Research Kluyverweg 1 2629 HS Delft The Netherlands Telephone: +31-15-2785377 Telefax : +31-15-2785322 E-mail : ron.noomen@deos.tudelft.nl A. PASS SUMMARY The table below gives an overview of the ranging data both on LAGEOS-1 and LAGEOS-2, as received by the Quick-Look Data Analysis Center (QLDAC) on Sat, Dec 11, 2004. All data were obtained through the NASA Crustal Dynamics Data Information system (CDDIS) and the Eurolas Data Center (EDC) in Germany. The data are unscreened and may span more than a week due to late reporting by the stations. ------------------------------------------------------------------------------ Station System/Location Period No. of Passes ID LAGEOS-1 LAGEOS-2 ------------------------------------------------------------------------------ 6810 Zimmerwald 846, Switzerland 041210 - 041211 5 2 7090 Yarragadee, Australia 041209 - 041210 2 1 7110 Monument Peak, California 041209 - 041210 2 3 7124 Papeete, Tahiti 041209 - 041209 - 1 7231 Wuhan, China (new) 041209 - 041210 - 2 7249 Beijing, China 041207 - 041210 3 2 7308 Tokyo, Japan 041210 - 041210 - 2 7501 Hartebeesthoek, SA (MOB-6) 041210 - 041210 - 1 7810 Zimmerwald 423, Switzerland 041210 - 041211 5 2 7824 San Fernando, Spain 041207 - 041209 1 3 7825 Mount Stromlo, Australia 041209 - 041209 - 1 7832 Riyad, Saudi Arabia 041209 - 041209 1 2 7837 Shanghai Observatory, China 041209 - 041209 1 1 7838 Simosato Observatory, Japan 041209 - 041210 2 4 7840 Herstmonceux, United Kingdom 041209 - 041211 3 2 7841 Potsdam, Germany 041210 - 041210 2 1 8834 Wettzell, Germany 041209 - 041210 4 2 ------ ------ --- --- TOTAL 041207 - 041211 31 32 ------------------------------------------------------------------------------ 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, Dec 3, 2004 to Sat, Dec 11, 2004. The measurement and dynamic models used in this analysis are close to the IERS Standard. The overall model is referred to as QLDACMOD11. The details of this model can be obtained on request. The terrestrial reference frame is provided by the ITRF2000 station coordinates solution (extended with coordinates of new stations, where necessary). The general statistics and results of this week´s analysis are thus: ----------------------------------------------------------------------- Satellite LAGEOS-1 LAGEOS-2 Number of Stations 24 23 Number of Passes 110/109 104/102 Number of Normal Points 1123/1117 1147/1132 Weighted RMS of Fit (mm) 12 14 ----------------------------------------------------------------------- Residual statistics per station. The header line for each station shows the station id, its name, whether the position is solved for or not and the measurement accuracy in mm. Rejected observations are not used for the calculation of the rms-of-fit, the biases or the scatter. The latter holds w.r.t. the residual trend line described by the bias estimates. Uncertainties are 3-sigma values. -------------------------------------------------------------------------------- Date Time Sat. Obs. RMS Range Bias Time Bias Scatter tot/rej (mm) (mm) (us) (mm) -------------------------------------------------------------------------------- Station 1864 (Maidanak) (position fixed, acc. 200 mm) 1864 3 Dec 04 14:51 LAG2 9 0 37 30 +- 202 3 +- 210 21 1864 3 Dec 04 15:41 LAG1 4 0 13 119 +-4929 61 +-2317 4 1864 4 Dec 04 13:23 LAG2 4 0 30 -407 +-5599 201 +-2675 15 1864 4 Dec 04 14:29 LAG1 4 0 41 31 +-1234 -7 +- 962 6 1864 5 Dec 04 13:31 LAG1 3 0 22 -39 +-6128 26 +-2619 7 1864 5 Dec 04 15:01 LAG2 8 0 26 -6 +- 212 -9 +- 155 22 1864 6 Dec 04 15:20 LAG1 8 0 22 -13 +- 212 14 +- 266 13 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 3 Dec 04 12:36 LAG1 17 0 33 -32 +- 45 3 +- 31 1 6810 3 Dec 04 14:16 LAG2 8 0 20 -11 +- 76 9 +- 66 5 6810 4 Dec 04 07:45 LAG1 22 0 14 -13 +- 39 -2 +- 20 4 6810 4 Dec 04 08:15 LAG2 18 0 15 -13 +- 43 -3 +- 32 3 6810 4 Dec 04 11:21 LAG1 13 0 30 -31 +- 54 -3 +- 43 1 6810 7 Dec 04 14:09 LAG1 16 0 13 -12 +- 46 1 +- 25 4 6810 7 Dec 04 14:41 LAG2 10 0 13 -17 +- 78 -7 +- 51 3 6810 7 Dec 04 17:31 LAG1 16 0 13 -6 +- 47 3 +- 21 6 6810 7 Dec 04 18:49 LAG2 9 0 9 -5 +- 64 -9 +- 75 5 6810 10 Dec 04 13:47 LAG1 13 0 8 4 +- 62 -6 +- 46 3 6810 10 Dec 04 16:58 LAG1 9 0 15 -2 +- 61 -6 +- 34 11 6810 10 Dec 04 17:01 LAG2 7 0 3 -2 +- 71 0 +- 37 2 6810 10 Dec 04 21:01 LAG1 4 0 43 54 +- 153 -35 +- 393 1 Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 7 Dec 04 13:55 LAG2 4 0 47 29 +- 273 -11 +- 185 2 Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 3 Dec 04 11:27 LAG1 8 0 6 -9 +- 30 -2 +- 22 1 7090 3 Dec 04 11:43 LAG2 20 0 6 -5 +- 10 3 +- 8 3 7090 3 Dec 04 14:53 LAG1 14 0 4 -1 +- 12 -4 +- 10 1 7090 3 Dec 04 15:37 LAG2 19 0 4 1 +- 9 -2 +- 7 1 7090 3 Dec 04 20:01 LAG2 10 0 6 6 +- 13 0 +- 11 0 7090 3 Dec 04 21:29 LAG1 16 0 10 -8 +- 10 2 +- 5 3 7090 5 Dec 04 11:51 LAG2 21 0 6 -4 +- 9 3 +- 6 1 7090 5 Dec 04 12:33 LAG1 9 0 5 -7 +- 43 1 +- 22 1 7090 5 Dec 04 15:43 LAG1 11 0 2 -1 +- 12 -1 +- 16 2 7090 5 Dec 04 16:07 LAG2 16 0 8 -6 +- 13 -2 +- 11 1 7090 5 Dec 04 19:13 LAG1 6 0 7 -7 +- 52 0 +- 47 0 7090 5 Dec 04 20:06 LAG2 19 0 8 -2 +- 13 4 +- 9 1 7090 5 Dec 04 22:33 LAG1 8 0 11 -18 +- 27 7 +- 19 2 7090 6 Dec 04 10:53 LAG1 18 0 13 -10 +- 10 -3 +- 6 3 7090 6 Dec 04 13:55 LAG2 15 0 4 1 +- 10 -2 +- 6 1 7090 6 Dec 04 14:39 LAG1 10 0 5 -5 +- 34 0 +- 20 1 7090 6 Dec 04 17:57 LAG1 5 0 6 19 +- 61 -19 +- 69 1 7090 6 Dec 04 18:15 LAG2 23 0 5 -2 +- 9 4 +- 7 1 7090 6 Dec 04 20:53 LAG1 12 0 15 2 +- 12 7 +- 6 3 7090 6 Dec 04 22:31 LAG2 8 0 11 5 +- 32 -4 +- 25 3 7090 7 Dec 04 11:59 LAG2 19 0 3 0 +- 9 0 +- 6 2 7090 7 Dec 04 12:59 LAG1 17 0 3 0 +- 10 1 +- 4 2 7090 7 Dec 04 16:03 LAG2 20 0 7 1 +- 10 -4 +- 7 3 7090 7 Dec 04 16:33 LAG1 7 0 11 11 +- 16 0 +- 33 0 7090 7 Dec 04 23:19 LAG1 10 0 11 -17 +- 21 11 +- 14 1 7090 8 Dec 04 11:37 LAG1 20 0 12 -2 +- 9 -5 +- 4 6 7090 9 Dec 04 13:43 LAG1 10 0 15 -15 +- 13 -1 +- 9 3 7090 9 Dec 04 16:55 LAG2 5 0 24 -53 +- 89 24 +- 70 4 7090 9 Dec 04 23:54 LAG1 14 0 7 4 +- 11 5 +- 9 2 Station 7105 (Greenbelt) (position fixed, acc. 10 mm) 7105 3 Dec 04 00:45 LAG1 21 0 5 -5 +- 9 0 +- 5 3 7105 4 Dec 04 20:01 LAG2 10 0 5 -5 +- 18 0 +- 21 1 7105 4 Dec 04 22:02 LAG1 14 0 11 9 +- 11 -3 +- 8 1 7105 6 Dec 04 00:07 LAG1 23 0 7 -6 +- 8 -1 +- 4 3 7105 8 Dec 04 23:37 LAG1 20 0 3 -1 +- 9 -1 +- 5 1 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 3 Dec 04 03:39 LAG2 14 0 8 -6 +- 12 2 +- 7 5 7110 3 Dec 04 04:35 LAG1 5 0 10 -4 +- 25 11 +- 58 5 7110 3 Dec 04 13:23 LAG1 8 1 12 23 +- 40 21 +- 42 7 7110 3 Dec 04 16:55 LAG1 3 0 6 28 +- 197 15 +- 103 5 7110 3 Dec 04 17:29 LAG2 5 0 7 -4 +- 57 -9 +- 50 4 7110 3 Dec 04 21:51 LAG2 6 0 6 -5 +- 29 0 +- 50 3 7110 9 Dec 04 14:33 LAG2 2 0 39 345 +- 936 -252 +- 768 0 7110 9 Dec 04 16:09 LAG1 6 0 14 5 +- 86 -9 +- 42 5 7110 9 Dec 04 18:17 LAG2 5 2 10 10 +- 35 -32 +- 75 0 7110 10 Dec 04 01:59 LAG1 11 0 19 -17 +- 13 7 +- 7 4 7110 10 Dec 04 02:35 LAG2 9 0 12 -8 +- 14 -5 +- 9 2 Station 7124 (Papeete) (position fixed, acc. 10 mm) 7124 8 Dec 04 08:00 LAG1 2 0 29 -32 +- 38 -15 +- 134 0 7124 9 Dec 04 09:10 LAG2 3 0 17 1 +- 123 20 +- 166 5 7124 9 Dec 04 13:43 LAG2 6 0 31 14 +- 73 13 +- 58 5 Station 7231 (Wuhan) (position fixed, acc. 50 mm) 7231 7 Dec 04 11:35 LAG2 4 0 24 -24 +- 84 -12 +- 79 9 7231 8 Dec 04 12:21 LAG1 10 0 32 -29 +- 50 26 +- 60 6 7231 9 Dec 04 12:01 LAG2 5 1 1251 1253 +- 190 -4 +- 359 4*CHK* 7231 10 Dec 04 10:23 LAG2 2 0 1264 -1543 +-9890 1436 +-5062 0 Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 7 Dec 04 10:11 LAG1 8 0 23 10 +- 55 16 +- 44 10 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 4 Dec 04 10:37 LAG1 14 0 22 18 +- 44 -1 +- 25 10 7249 5 Dec 04 11:13 LAG2 14 0 6 -3 +- 42 -2 +- 42 5 7249 5 Dec 04 13:03 LAG1 12 0 7 2 +- 55 0 +- 61 6 7249 6 Dec 04 09:53 LAG2 8 0 29 3 +- 698 -13 +- 297 3 7249 6 Dec 04 11:31 LAG1 21 0 30 -15 +- 36 2 +- 21 27 7249 6 Dec 04 13:27 LAG2 14 0 42 -3 +- 58 -39 +- 67 21 7249 7 Dec 04 10:23 LAG1 5 5 0 0 +- 0 0 +- 0 0 7249 7 Dec 04 11:32 LAG2 14 0 10 1 +- 46 -1 +- 45 10 7249 7 Dec 04 13:54 LAG1 6 0 14 5 +- 63 23 +- 208 10 7249 8 Dec 04 09:49 LAG2 8 0 20 -35 +- 111 20 +- 101 6 7249 8 Dec 04 12:29 LAG1 4 0 84 72 +- 78 91 +- 164 38 7249 9 Dec 04 11:51 LAG2 12 0 32 34 +- 66 -7 +- 64 15 7249 10 Dec 04 09:39 LAG1 11 0 25 -21 +- 47 9 +- 34 12 7249 10 Dec 04 10:03 LAG2 11 0 39 5 +- 100 22 +- 67 9 7249 10 Dec 04 13:15 LAG1 11 0 12 0 +- 46 3 +- 74 12 Station 7308 (Tokyo) (position fixed, acc. 50 mm) 7308 6 Dec 04 05:33 LAG2 13 0 48 -53 +- 65 6 +- 59 5 7308 6 Dec 04 07:43 LAG1 10 0 23 -22 +- 61 -17 +- 37 6 7308 8 Dec 04 08:56 LAG1 10 0 31 -16 +- 158 -6 +- 75 9 7308 8 Dec 04 09:51 LAG2 10 0 19 5 +- 50 19 +- 71 10 7308 10 Dec 04 06:17 LAG2 5 0 63 -83 +- 435 13 +- 289 6 7308 10 Dec 04 09:55 LAG2 18 0 39 21 +- 36 21 +- 30 16 Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 3 Dec 04 05:37 LAG2 7 0 6 16 +- 50 10 +- 34 4 7501 7 Dec 04 20:05 LAG2 5 0 19 6 +- 129 7 +- 77 0 7501 7 Dec 04 20:53 LAG1 3 0 15 19 +- 431 -2 +- 229 1 7501 8 Dec 04 00:09 LAG2 12 0 26 13 +- 18 17 +- 21 3 7501 10 Dec 04 04:31 LAG2 5 0 21 33 +- 47 15 +- 53 3 Station 7806 (Metsahovi) (position fixed, acc. 30 mm) 7806 3 Dec 04 16:11 LAG1 14 0 16 -13 +- 26 -2 +- 20 6 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 3 Dec 04 12:36 LAG1 17 0 23 -22 +- 45 4 +- 31 1 7810 3 Dec 04 14:17 LAG2 9 0 11 -6 +- 66 5 +- 60 3 7810 4 Dec 04 07:45 LAG1 23 0 8 -4 +- 38 -3 +- 19 3 7810 4 Dec 04 08:19 LAG2 16 0 9 -6 +- 46 -4 +- 38 2 7810 4 Dec 04 11:21 LAG1 13 0 23 -24 +- 54 -2 +- 43 1 7810 7 Dec 04 14:09 LAG1 15 0 6 -2 +- 47 2 +- 27 3 7810 7 Dec 04 14:41 LAG2 12 0 17 -11 +- 53 -8 +- 30 2 7810 7 Dec 04 17:31 LAG1 14 0 7 0 +- 52 3 +- 23 2 7810 7 Dec 04 18:49 LAG2 10 0 9 -2 +- 58 -10 +- 65 2 7810 10 Dec 04 13:47 LAG1 13 0 11 13 +- 61 -7 +- 45 3 7810 10 Dec 04 16:57 LAG1 11 0 18 -4 +- 55 -8 +- 27 9 7810 10 Dec 04 17:01 LAG2 7 0 5 3 +- 71 0 +- 37 3 7810 10 Dec 04 21:01 LAG1 5 0 44 54 +- 144 -24 +- 291 0 Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 6 Dec 04 16:45 LAG2 7 0 22 9 +- 87 -15 +- 90 4 7811 6 Dec 04 19:20 LAG1 5 0 16 15 +- 107 -25 +- 240 11 Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 4 Dec 04 18:41 LAG1 6 0 50 152 +- 507 -40 +- 198 3 7824 4 Dec 04 20:31 LAG2 4 0 62 91 +- 297 26 +- 259 6 7824 4 Dec 04 21:57 LAG1 2 0 34 23 +- 669 -20 +-1314 0 7824 5 Dec 04 20:23 LAG1 2 0 43 144 +-2239 54 +-1202 0 7824 6 Dec 04 21:15 LAG2 2 0 25 -3595 +-9999 2206 +-9547 0 7824 7 Dec 04 19:14 LAG2 6 0 43 86 +- 285 -26 +- 167 1 7824 8 Dec 04 21:15 LAG2 3 0 47 54 +- 420 -10 +- 623 3 7824 9 Dec 04 18:24 LAG1 2 0 63 455 +-3800 162 +-1569 0 7824 9 Dec 04 18:59 LAG2 8 0 80 84 +- 81 3 +- 63 7 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 3 Dec 04 07:55 LAG1 6 0 13 -6 +- 28 -6 +- 25 3 7825 3 Dec 04 11:24 LAG1 1 0 26 0 +- 0 0 +- 0 0 7825 4 Dec 04 09:44 LAG1 13 0 6 1 +- 12 2 +- 6 4 7825 4 Dec 04 09:53 LAG2 17 0 5 4 +- 10 1 +- 6 2 7825 4 Dec 04 13:24 LAG1 5 0 5 -2 +- 44 2 +- 46 2 7825 4 Dec 04 14:19 LAG2 15 0 4 5 +- 19 -3 +- 12 2 7825 4 Dec 04 16:42 LAG1 1 0 1 0 +- 0 0 +- 0 0 7825 5 Dec 04 12:29 LAG2 11 0 6 5 +- 38 -4 +- 20 4 7825 5 Dec 04 15:27 LAG1 12 0 3 -1 +- 12 0 +- 13 2 7825 5 Dec 04 16:13 LAG2 21 0 4 -1 +- 9 -3 +- 7 2 7825 5 Dec 04 18:42 LAG1 12 0 3 0 +- 12 0 +- 6 3 7825 5 Dec 04 20:21 LAG2 17 0 2 2 +- 14 1 +- 8 2 7825 5 Dec 04 22:21 LAG1 15 0 12 -11 +- 12 9 +- 10 3 7825 9 Dec 04 08:47 LAG2 6 0 9 9 +- 18 2 +- 54 1 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 4 Dec 04 08:24 LAG2 11 0 16 -17 +- 21 -6 +- 27 3 7832 4 Dec 04 17:21 LAG2 8 0 4 -7 +- 165 2 +- 87 2 7832 4 Dec 04 17:59 LAG1 8 0 6 6 +- 29 2 +- 45 3 7832 6 Dec 04 05:17 LAG1 11 0 4 4 +- 24 0 +- 14 2 7832 6 Dec 04 08:45 LAG2 7 0 13 -12 +- 27 0 +- 59 4 7832 6 Dec 04 12:59 LAG2 6 0 7 -17 +- 133 -18 +- 106 0 7832 6 Dec 04 15:05 LAG1 6 0 5 -35 +- 210 -14 +- 90 1 7832 6 Dec 04 17:01 LAG2 8 0 11 -20 +- 88 -19 +- 59 2 7832 7 Dec 04 03:47 LAG1 11 0 15 15 +- 19 1 +- 11 2 7832 7 Dec 04 13:59 LAG1 6 0 7 6 +- 27 4 +- 50 3 7832 9 Dec 04 06:59 LAG2 3 0 10 20 +- 306 9 +- 276 1 7832 9 Dec 04 11:11 LAG2 11 0 8 -8 +- 34 0 +- 40 2 7832 9 Dec 04 15:00 LAG1 8 0 13 -18 +- 136 12 +- 57 7 7832 9 Dec 04 15:29 LAG2 14 0 11 -3 +- 18 -5 +- 11 5 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 5 Dec 04 11:21 LAG2 17 0 11 5 +- 37 0 +- 33 9 7837 7 Dec 04 10:03 LAG1 3 0 8 -2 +- 122 -5 +- 73 3 7837 7 Dec 04 11:41 LAG2 4 0 54 60 +- 87 74 +- 167 7 7837 8 Dec 04 09:43 LAG2 13 0 43 1 +- 44 26 +- 30 17 7837 8 Dec 04 12:29 LAG1 4 0 21 -39 +- 199 32 +- 297 2 7837 8 Dec 04 21:29 LAG1 5 0 22 48 +- 239 -53 +- 238 16 7837 9 Dec 04 11:05 LAG1 9 0 8 0 +- 108 3 +- 72 5 7837 9 Dec 04 11:49 LAG2 17 0 18 6 +- 39 -7 +- 37 16 Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 3 Dec 04 01:55 LAG1 10 0 10 15 +- 45 -8 +- 38 2 7838 3 Dec 04 02:43 LAG2 18 0 16 15 +- 23 0 +- 18 5 7838 3 Dec 04 06:58 LAG2 14 0 33 34 +- 27 18 +- 25 5 7838 5 Dec 04 07:19 LAG2 21 0 36 29 +- 21 11 +- 16 4 7838 5 Dec 04 09:01 LAG1 23 0 32 32 +- 20 2 +- 10 3 7838 5 Dec 04 11:15 LAG2 24 0 22 22 +- 19 2 +- 15 3 7838 6 Dec 04 01:01 LAG2 9 0 38 31 +- 99 -4 +- 60 7 7838 6 Dec 04 05:09 LAG2 26 0 17 11 +- 18 7 +- 13 7 7838 6 Dec 04 09:21 LAG2 27 0 36 29 +- 18 10 +- 11 5 7838 6 Dec 04 11:21 LAG1 19 0 11 8 +- 22 -6 +- 17 3 7838 7 Dec 04 07:43 LAG2 12 0 47 42 +- 32 7 +- 34 7 7838 7 Dec 04 09:51 LAG1 25 0 24 15 +- 19 9 +- 10 5 7838 7 Dec 04 11:55 LAG2 9 0 21 -25 +- 102 37 +- 87 4 7838 8 Dec 04 01:41 LAG2 6 0 31 47 +- 140 -10 +- 87 7 7838 8 Dec 04 05:35 LAG2 21 0 21 14 +- 22 9 +- 18 5 7838 8 Dec 04 08:29 LAG1 23 0 47 46 +- 20 -1 +- 10 6 7838 8 Dec 04 09:43 LAG2 21 0 35 26 +- 22 10 +- 15 6 7838 9 Dec 04 11:51 LAG2 10 0 16 -7 +- 33 -31 +- 61 5 7838 10 Dec 04 01:41 LAG2 12 0 27 28 +- 30 -5 +- 27 3 7838 10 Dec 04 05:41 LAG2 10 0 5 -11 +- 90 -8 +- 64 3 7838 10 Dec 04 06:05 LAG1 8 0 10 5 +- 34 3 +- 43 8 7838 10 Dec 04 09:21 LAG1 10 0 22 34 +- 72 8 +- 40 6 7838 10 Dec 04 10:01 LAG2 12 0 29 30 +- 31 -3 +- 31 4 Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 3 Dec 04 18:21 LAG2 14 0 5 -4 +- 11 -3 +- 11 0 7839 3 Dec 04 19:45 LAG1 14 0 2 0 +- 12 0 +- 11 1 7839 7 Dec 04 07:31 LAG1 7 0 2 0 +- 25 -1 +- 14 1 7839 7 Dec 04 10:51 LAG1 4 0 2 -1 +- 25 -1 +- 24 1 7839 7 Dec 04 14:07 LAG1 12 0 7 1 +- 12 4 +- 7 1 7839 7 Dec 04 14:47 LAG2 14 0 17 -8 +- 11 -7 +- 5 1 Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 7 Dec 04 07:16 LAG1 10 0 17 17 +- 22 1 +- 14 3 7840 7 Dec 04 11:01 LAG1 7 0 5 1 +- 39 -3 +- 20 1 7840 8 Dec 04 19:59 LAG1 17 0 14 12 +- 16 -6 +- 13 2 7840 9 Dec 04 10:47 LAG2 14 0 3 1 +- 22 2 +- 17 1 7840 9 Dec 04 11:37 LAG1 13 0 18 18 +- 18 -4 +- 12 5 7840 9 Dec 04 15:07 LAG2 5 0 12 0 +- 31 -12 +- 31 1 7840 9 Dec 04 15:13 LAG1 6 0 1 0 +- 29 0 +- 50 1 Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 10 Dec 04 06:45 LAG1 15 0 7 -6 +- 11 0 +- 8 2 7841 10 Dec 04 09:05 LAG2 7 0 14 18 +- 32 4 +- 30 2 7841 10 Dec 04 10:17 LAG1 11 0 6 1 +- 13 -3 +- 11 4 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 6 Dec 04 12:23 LAG1 4 0 3 4 +- 94 -4 +- 84 3 7941 6 Dec 04 12:45 LAG2 3 0 2 -12 +- 153 -13 +- 163 0 Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 8 Dec 04 13:21 LAG2 6 0 16 0 +- 175 -8 +- 85 2 8834 8 Dec 04 16:19 LAG1 6 0 9 -10 +- 60 -1 +- 36 3 8834 8 Dec 04 16:57 LAG2 9 0 8 -3 +- 21 5 +- 21 3 8834 9 Dec 04 04:40 LAG1 3 0 12 12 +- 28 -35 +- 114 5 8834 9 Dec 04 07:10 LAG2 11 0 10 -1 +- 27 -1 +- 19 10 8834 9 Dec 04 08:03 LAG1 7 0 8 4 +- 40 6 +- 23 4 8834 9 Dec 04 10:43 LAG2 14 0 12 -10 +- 14 0 +- 7 7 8834 9 Dec 04 11:35 LAG1 5 0 2 -1 +- 18 -1 +- 11 1 8834 10 Dec 04 06:31 LAG1 8 0 12 -46 +- 114 -14 +- 46 2 8834 10 Dec 04 08:55 LAG2 9 0 17 -11 +- 16 6 +- 13 3 8834 10 Dec 04 10:13 LAG1 6 0 4 9 +- 65 3 +- 40 3 8834 10 Dec 04 13:47 LAG1 10 0 6 3 +- 16 -4 +- 14 5 -------------------------------------------------------------------------------- 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 - 041105 0/ 15/ 0 0/ 17/ 0 32 1831 LVIL 040815 - 041105 0/ 21/ 0 0/ 24/ 0 45 1864 MD2LAS 040701 - 041206 0/ 85/ 0 0/ 73/ 0 158 1873 SIMLAS 040703 - 040813 0/ 25/ 0 0/ 15/ 0 40 1884 RIGLAS 040712 - 041116 0/ 37/ 1 0/ 18/ 2 58 1893 CRMLAS 040705 - 041012 0/ 45/ 0 0/ 35/ 0 80 6405 TIGO 040710 - 041124 2/ 4/ 0 2/ 2/ 0 10 6810 ZIMLAT 040805 - 041211 117/ 73/ 11 55/ 82/ 11 349 7080 MLRS25 040701 - 041207 33/ 38/ 0 34/ 51/ 3 159 7090 ML0514 040716 - 041210 81/214/ 13 80/123/ 16 527 7105 ML0725 040701 - 041209 0/ 68/ 3 2/ 73/ 5 151 7110 ML0414 040701 - 041210 60/102/ 9 50/101/ 15 337 7124 ML0819 040705 - 041209 0/ 31/ 0 0/ 9/ 0 40 7231 WUHA01 040701 - 041210 0/ 8/ 0 0/ 22/ 0 30 7237 CHALAS 040702 - 041207 0/117/ 0 0/130/ 1 248 7249 BEJLAS 040701 - 041210 0/ 63/ 0 0/ 80/ 0 143 7308 CRLLAS 041201 - 041210 0/ 3/ 1 2/ 3/ 0 9 7355 TROS02 040702 - 040829 0/ 37/ 0 0/ 29/ 0 66 7405 TIGO 040710 - 041124 2/ 6/ 0 0/ 3/ 0 11 7501 ML0616 040701 - 041210 12/ 19/ 1 54/ 56/ 4 146 7604 BREF 041017 - 041021 0/ 1/ 0 0/ 2/ 0 3 7806 METLAS 040720 - 041203 0/ 16/ 0 0/ 10/ 0 26 7810 ZIMLAT 040701 - 041211 170/ 99/ 17 81/102/ 14 483 7811 POLLAS 040706 - 041206 0/ 47/ 0 0/ 56/ 0 103 7824 SPNLAS 040701 - 041209 0/ 72/ 0 0/ 77/ 0 149 7825 STL3 040807 - 041209 49/ 78/ 11 66/ 45/ 7 256 7832 SALRO 040702 - 041209 88/161/ 8 106/192/ 21 576 7835 GRASSE 040702 - 041130 0/ 33/ 0 0/ 23/ 1 57 7836 GFZLAS 040701 - 040701 0/ 1/ 0 0/ 0/ 0 1 7837 CHILAS 040704 - 041209 0/ 80/ 0 0/109/ 1 190 7838 SHOLAS 040701 - 041210 35/ 91/ 3 60/108/ 5 302 7839 AUSLAS 040701 - 041207 123/117/ 23 53/114/ 19 449 7840 RGOLAS 040701 - 041211 73/ 72/ 15 38/ 63/ 8 269 7841 GFZLA3 040702 - 041210 16/ 52/ 9 9/ 53/ 5 144 7845 GRASLL 040705 - 040920 11/ 14/ 0 3/ 12/ 1 41 7941 MLROnn 040701 - 041206 64/ 47/ 7 54/ 41/ 2 215 8834 WLRS01 040701 - 041210 160/101/ 19 90/116/ 13 499 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 041204.0 192.2 +/- 0.1 286.7 +/- 0.1 -32544.63 +/- 0.02 041205.0 190.5 +/- 0.2 284.7 +/- 0.2 -32545.35 +/- 0.03 041206.0 189.2 +/- 0.2 282.6 +/- 0.1 -32546.24 +/- 0.04 041207.0 188.0 +/- 0.2 280.0 +/- 0.1 -32547.22 +/- 0.05 041208.0 186.4 +/- 0.1 278.9 +/- 0.1 -32548.35 +/- 0.05 041209.0 184.6 +/- 0.1 276.8 +/- 0.1 -32549.40 +/- 0.06 041210.0 182.4 +/- 0.1 274.7 +/- 0.1 -32550.23 +/- 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 ******************************************************************************** |