| Date: | 2006-01-01 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6596: Delft QL Report January 01, 2006 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2006-01-01 13:15:00 UTC Message No. 6596 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report January 01, 2006 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS January 1, 2006 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 Sun, Jan 1, 2006. 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 Sun, Jan 1, 2006. 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 ------------------------------------------------------------------------------ 7825 Mount Stromlo, Australia 051230 - 051231 2 2 7832 Riyad, Saudi Arabia 051230 - 051231 5 4 7839 Graz, Austria 051230 - 051230 3 2 7840 Herstmonceux, United Kingdom 051230 - 051231 3 3 7841 Potsdam, Germany 051230 - 051231 2 1 ------ ------ --- --- TOTAL 051230 - 051231 15 12 ------------------------------------------------------------------------------ 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 Sat, Dec 24, 2005 to Sun, Jan 1, 2006. 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 13 13 Number of Passes 46/ 46 36/ 36 Number of Normal Points 284/ 281 0261/ 261 Weighted RMS of Fit (mm) 712 545 ----------------------------------------------------------------------- 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 6405 (Concepcion) (position solved, acc. 20 mm) 6405 28 Dec 05 05:31 LAG1 8 0 41 -20 +- 73 -29 +- 63 38 6405 29 Dec 05 08:07 LAG1 2 0 30 -180 +- 387 152 +- 375 0 6405 30 Dec 05 10:17 LAG1 1 0 22 0 +- 0 0 +- 0 0 Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 24 Dec 05 00:19 LAG2 2 0 1249 -1922 +-6946 265 +-2734 0 6810 24 Dec 05 00:55 LAG1 7 0 737 -874 +- 170 -974 +- 114 20*CHK* 6810 29 Dec 05 16:11 LAG2 1 0 195 0 +- 0 0 +- 0 0 6810 30 Dec 05 03:29 LAG1 2 0 2647 1370 +-1093 -1567 +-1338 0*CHK* Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 27 Dec 05 05:35 LAG2 1 0 28 0 +- 0 0 +- 0 0 7080 30 Dec 05 04:01 LAG2 3 0 477 -511 +- 41 527 +- 212 2*CHK* Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 24 Dec 05 00:00 LAG1 4 0 703 3456 +- 110 -3102 +- 94 5*CHK* 7090 24 Dec 05 01:15 LAG2 6 0 187 534 +- 49 569 +- 59 7*CHK* 7090 24 Dec 05 05:21 LAG2 5 0 206 2028 +- 184 1048 +- 95 5*CHK* 7090 24 Dec 05 06:36 LAG1 2 0 573 -208 +- 117 -493 +- 156 0*CHK* 7090 28 Dec 05 04:57 LAG1 2 0 61 2139 +-1083 -891 +- 448 0*CHK* 7090 28 Dec 05 23:49 LAG2 3 0 153 -540 +- 86 -895 +- 157 0*CHK* 7090 29 Dec 05 00:05 LAG1 2 0 145 -118 +- 29 1159 +- 348 0*CHK* 7090 30 Dec 05 02:05 LAG2 10 0 156 158 +- 13 30 +- 17 4*CHK* 7090 30 Dec 05 05:33 LAG1 1 0 1102 0 +- 0 0 +- 0 0 Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 29 Dec 05 23:45 LAG2 2 0 42 317 +- 224 -428 +- 303 0*CHK* 7110 30 Dec 05 03:31 LAG2 9 1 281 -687 +- 53 -573 +- 35 61*CHK* Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 28 Dec 05 17:29 LAG1 1 0 1537 0 +- 0 0 +- 0 0 7237 29 Dec 05 09:08 LAG2 1 0 230 0 +- 0 0 +- 0 0 7237 29 Dec 05 16:09 LAG1 5 0 2624 -309 +- 521 -1295 +- 230 6*CHK* Station 7405 (Concepcion) (position solved, acc. 20 mm) 7405 29 Dec 05 08:07 LAG1 3 0 34 -159 +- 208 114 +- 173 1 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 24 Dec 05 00:17 LAG2 5 0 1233 -2020 +-1778 307 +- 693 7*CHK* 7810 24 Dec 05 00:55 LAG1 7 0 741 -871 +- 169 -976 +- 114 20*CHK* 7810 30 Dec 05 03:29 LAG1 2 0 2673 1421 +-1326 -1514 +-1601 0*CHK* Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 29 Dec 05 23:53 LAG1 4 0 433 -859 +- 236 -515 +- 236 12*CHK* Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 27 Dec 05 02:17 LAG2 1 0 46 0 +- 0 0 +- 0 0 Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 24 Dec 05 02:40 LAG1 7 0 107 -20 +- 57 47 +- 31 4 7825 24 Dec 05 15:10 LAG1 3 0 281 751 +- 185 863 +- 158 5*CHK* 7825 24 Dec 05 15:39 LAG2 2 0 42 -546 +- 535 1143 +-1063 0 7825 24 Dec 05 18:52 LAG1 7 0 173 229 +- 22 -124 +- 13 37*CHK* 7825 24 Dec 05 19:32 LAG2 3 0 307 -399 +- 31 935 +- 103 2*CHK* 7825 26 Dec 05 02:17 LAG2 5 0 126 -1361 +- 203 677 +- 100 13*CHK* 7825 28 Dec 05 16:55 LAG1 1 0 1323 0 +- 0 0 +- 0 0 7825 28 Dec 05 19:53 LAG2 4 0 205 -249 +- 64 -55 +- 76 1*CHK* 7825 28 Dec 05 20:24 LAG1 2 0 254 362 +- 109 190 +- 183 0*CHK* 7825 29 Dec 05 17:45 LAG2 4 0 176 1579 +- 286 652 +- 129 1*CHK* 7825 29 Dec 05 19:06 LAG1 3 0 482 -484 +- 36 -7 +- 89 1*CHK* 7825 29 Dec 05 22:13 LAG2 2 0 181 -418 +- 114 -613 +- 272 0*CHK* 7825 30 Dec 05 15:59 LAG2 19 0 480 229 +- 10 270 +- 7 38*CHK* 7825 30 Dec 05 17:29 LAG1 19 0 682 -518 +- 9 199 +- 5 68*CHK* 7825 30 Dec 05 19:55 LAG2 22 0 419 414 +- 8 4 +- 6 67*CHK* 7825 31 Dec 05 16:19 LAG1 16 0 125 -55 +- 12 -51 +- 8 36 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 24 Dec 05 00:36 LAG1 2 0 403 -1797 +- 637 -1410 +- 413 0*CHK* 7832 24 Dec 05 23:20 LAG1 2 0 951 -137 +- 287 935 +- 329 0*CHK* 7832 28 Dec 05 21:22 LAG1 2 0 974 866 +- 415 1407 +- 319 0*CHK* 7832 29 Dec 05 13:50 LAG1 1 0 1834 0 +- 0 0 +- 0 0 7832 30 Dec 05 21:59 LAG1 11 0 2333 -2079 +- 22 276 +- 12 112*CHK* 7832 30 Dec 05 22:53 LAG2 8 0 540 296 +- 30 -260 +- 26 50*CHK* 7832 31 Dec 05 01:47 LAG1 7 0 646 -697 +- 27 420 +- 67 7*CHK* 7832 31 Dec 05 10:53 LAG1 13 0 2111 3439 +- 30 -1486 +- 18 152*CHK* 7832 31 Dec 05 12:37 LAG2 7 0 873 696 +- 30 -1188 +- 34 29*CHK* 7832 31 Dec 05 14:11 LAG1 7 0 576 535 +- 64 786 +- 49 6*CHK* 7832 31 Dec 05 16:37 LAG2 3 0 514 -2497 +-1004 -1942 +- 650 7*CHK* 7832 31 Dec 05 20:45 LAG1 8 0 977 1502 +- 44 596 +- 37 13*CHK* 7832 31 Dec 05 21:01 LAG2 7 0 546 382 +- 54 -155 +- 47 21*CHK* Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 30 Dec 05 15:22 LAG1 16 2 454 -274 +- 11 -117 +- 5 212*CHK* 7839 30 Dec 05 18:10 LAG2 14 3 826 -41 +- 34 -455 +- 18 119*CHK* 7839 30 Dec 05 18:55 LAG1 14 0 370 324 +- 11 53 +- 6 70*CHK* 7839 30 Dec 05 22:17 LAG1 9 0 381 -245 +- 14 -72 +- 6 227*CHK* 7839 30 Dec 05 22:22 LAG2 8 4 242 -2470 +- 435 -959 +- 185 9*CHK* Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 28 Dec 05 14:41 LAG1 4 0 559 1413 +- 334 933 +- 160 7*CHK* 7840 28 Dec 05 17:57 LAG2 5 0 708 1698 +- 258 1097 +- 119 10*CHK* 7840 30 Dec 05 22:15 LAG2 12 0 834 607 +- 19 338 +- 9 316*CHK* 7840 30 Dec 05 22:25 LAG1 11 0 783 -728 +- 19 -104 +- 10 223*CHK* 7840 31 Dec 05 14:07 LAG1 18 0 1534 -1231 +- 15 -607 +- 10 247*CHK* 7840 31 Dec 05 16:19 LAG2 18 0 1204 1174 +- 15 91 +- 9 198*CHK* 7840 31 Dec 05 20:19 LAG2 20 0 735 282 +- 15 323 +- 9 488*CHK* 7840 31 Dec 05 21:07 LAG1 16 0 527 -487 +- 16 -124 +- 10 161*CHK* Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 25 Dec 05 15:25 LAG1 4 1 28 -3 +- 26 -34 +- 34 2 7841 30 Dec 05 15:49 LAG1 8 0 527 -883 +- 51 193 +- 26 20*CHK* 7841 30 Dec 05 19:01 LAG1 12 0 71 7 +- 12 -56 +- 10 24 7841 31 Dec 05 16:29 LAG2 4 0 910 1059 +- 158 89 +- 94 4*CHK* Station 7941 (Matera) (position solved, acc. 10 mm) 7941 24 Dec 05 13:32 LAG1 3 0 416 -1716 +- 197 1259 +- 120 2*CHK* 7941 24 Dec 05 13:41 LAG2 10 0 266 170 +- 16 398 +- 19 3*CHK* 7941 24 Dec 05 17:03 LAG1 3 0 183 -1341 +- 183 802 +- 115 4*CHK* 7941 24 Dec 05 17:58 LAG2 13 0 131 -314 +- 29 168 +- 17 36*CHK* 7941 28 Dec 05 18:01 LAG2 9 0 178 -138 +- 16 35 +- 14 69*CHK* 7941 28 Dec 05 22:24 LAG2 13 0 556 278 +- 11 -460 +- 10 71*CHK* 7941 29 Dec 05 01:29 LAG1 2 0 816 71 +- 742 -460 +- 384 0 -------------------------------------------------------------------------------- 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 - 051223 0/124/ 0 0/ 54/ 0 178 1873 SIMLAS 050701 - 051222 0/ 59/ 0 0/ 12/ 0 71 1884 RIGLAS 050703 - 051219 0/100/ 1 0/ 25/ 0 126 1893 CRMLAS 050723 - 051013 0/ 17/ 0 0/ 0/ 0 17 6405 TIGO 050705 - 051230 52/ 15/ 3 45/ 32/ 4 151 6810 ZIMLAT 050701 - 051230 107/222/ 22 145/122/ 19 637 7080 MLRS25 050701 - 051230 7/ 75/ 2 10/ 66/ 3 163 7090 ML0514 050701 - 051230 196/152/ 33 159/219/ 19 778 7105 ML0725 050704 - 051221 14/100/ 11 22/ 61/ 7 215 7110 ML0414 050701 - 051230 47/187/ 28 55/ 95/ 9 421 7124 ML0819 050818 - 051102 1/ 14/ 2 1/ 32/ 1 51 7130 TL04** 050803 - 051219 8/ 26/ 1 12/ 11/ 2 60 7237 CHALAS 050410 - 051229 0/190/ 2 0/127/ 0 319 7249 BEJLAS 050703 - 051223 0/ 99/ 0 0/ 64/ 0 163 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 - 051229 2/ 6/ 0 0/ 9/ 0 17 7501 ML0616 050701 - 051223 24/ 46/ 5 14/ 64/ 3 156 7810 ZIMLAT 050701 - 051230 106/219/ 22 146/119/ 19 631 7811 POLLAS 050704 - 051229 0/ 89/ 0 0/ 23/ 0 112 7821 CHILAS 051213 - 051218 0/ 4/ 0 0/ 9/ 0 13 7824 SPNLAS 050701 - 051227 10/152/ 8 10/ 86/ 7 273 7825 STL3 050702 - 051231 298/118/ 23 158/175/ 23 795 7832 SALRO 050702 - 051231 95/227/ 26 106/165/ 19 638 7835 GRASSE 050701 - 050705 0/ 3/ 0 0/ 2/ 0 5 7838 SHOLAS 050714 - 051222 22/103/ 8 24/ 87/ 4 248 7839 AUSLAS 050702 - 051230 54/141/ 23 95/ 60/ 5 378 7840 RGOLAS 050702 - 051231 76/228/ 28 111/109/ 12 564 7841 GFZLA3 050713 - 051231 8/ 89/ 9 7/ 33/ 2 148 7848 FTLR06 050515 - 051027 6/ 48/ 2 5/ 22/ 4 87 7941 MLROnn 050701 - 051229 54/147/ 12 70/ 70/ 10 363 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) -------------------------------------------------------------- 051225.0 82.9 +/- 0.9 219.5 +/- 1.4 -32661.92 +/- 0.19 051226.0 18.9 +/- 1.4 380.1 +/- 4.9 -32608.67 +/- 0.50 051227.0 -16.5 +/-10.0 154.7 +/- 2.0 -32519.08 +/- 0.79 051228.0 -103.2 +/- 5.9 112.7 +/- 4.0 -32441.85 +/- 0.84 051229.0 107.8 +/- 0.7 207.9 +/- 0.6 -32342.18 +/- 0.85 051230.0 8.6 +/- 0.5 355.3 +/- 0.3 -32220.41 +/- 0.90 051231.0 130.8 +/- 0.2 290.9 +/- 0.6 -32062.05 +/- 0.95 -------------------------------------------------------------- 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 ******************************************************************************** |