| Date: | 2005-12-31 13:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 6594: Delft QL Report December 31, 2005 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2005-12-31 13:15:00 UTC Message No. 6594 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report December 31, 2005 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS December 31, 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, Dec 31, 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, Dec 31, 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 ------------------------------------------------------------------------------ 6405 Concepcion, Chile (TIGO 847) 051230 - 051230 2 1 6810 Zimmerwald 846, Switzerland 051229 - 051230 4 3 7080 McDonald Obs., Fort Davis, TX 051230 - 051230 - 1 7090 Yarragadee, Australia 051229 - 051230 2 1 7110 Monument Peak, California 051229 - 051230 2 3 7237 Changchun, China 051229 - 051230 3 2 7249 Beijing, China 051229 - 051229 - 1 7810 Zimmerwald 423, Switzerland 051229 - 051230 4 2 7811 Borowiec, Poland 051229 - 051230 1 - 7824 San Fernando, Spain 051230 - 051230 - 1 7825 Mount Stromlo, Australia 051229 - 051230 4 6 7832 Riyad, Saudi Arabia 051229 - 051231 4 1 7839 Graz, Austria 051230 - 051230 3 2 7840 Herstmonceux, United Kingdom 051229 - 051230 3 2 7841 Potsdam, Germany 051230 - 051230 2 - ------ ------ --- --- TOTAL 051229 - 051231 34 26 ------------------------------------------------------------------------------ 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 23, 2005 to Sat, Dec 31, 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 19 18 Number of Passes 91/ 88 80/ 75 Number of Normal Points 836/ 828 0755/ 734 Weighted RMS of Fit (mm) 696 667 ----------------------------------------------------------------------- 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 23 Dec 05 15:55 LAG2 9 0 608 397 +- 207 575 +- 208 69*CHK* 1864 23 Dec 05 17:43 LAG1 7 0 395 205 +- 226 -300 +- 204 45 Station 6405 (Concepcion) (position solved, acc. 20 mm) 6405 28 Dec 05 05:31 LAG1 18 0 698 -533 +- 15 -462 +- 15 173*CHK* 6405 29 Dec 05 07:53 LAG1 14 0 589 -504 +- 19 419 +- 13 21*CHK* 6405 30 Dec 05 06:17 LAG1 15 1 1031 1008 +- 18 45 +- 11 267*CHK* 6405 30 Dec 05 08:49 LAG2 6 1 4396 4830 +- 58 704 +- 81 22*CHK* 6405 30 Dec 05 10:17 LAG1 3 0 340 1275 +- 273 -1122 +- 197 4*CHK* Station 6810 (Zimmerwald 846) (position fixed, acc. 60 mm) 6810 23 Dec 05 18:09 LAG1 12 0 530 139 +- 74 -388 +- 46 25*CHK* 6810 23 Dec 05 19:27 LAG2 23 0 759 187 +- 38 430 +- 22 103*CHK* 6810 23 Dec 05 21:23 LAG1 9 0 977 898 +- 89 -69 +- 60 34*CHK* 6810 23 Dec 05 23:31 LAG2 24 0 236 -232 +- 37 28 +- 20 9*CHK* 6810 24 Dec 05 00:43 LAG1 20 0 287 120 +- 41 138 +- 20 48*CHK* 6810 26 Dec 05 22:13 LAG2 2 0 1342 -725 +- 588 -4806 +-1385 0*CHK* 6810 29 Dec 05 12:25 LAG2 7 0 2532 2574 +- 74 324 +- 193 14*CHK* 6810 29 Dec 05 13:25 LAG1 16 0 372 -375 +- 49 5 +- 37 5*CHK* 6810 29 Dec 05 16:11 LAG2 2 0 164 2157 +-9999 1062 +-9999 0 6810 29 Dec 05 23:37 LAG1 22 0 1288 -1272 +- 39 -80 +- 18 93*CHK* 6810 30 Dec 05 00:11 LAG2 19 0 2922 2889 +- 42 545 +- 26 208*CHK* 6810 30 Dec 05 03:23 LAG1 17 0 1384 -673 +- 47 -796 +- 38 43*CHK* 6810 30 Dec 05 11:52 LAG1 16 1 5235 -2283 +- 47 -4693 +- 53 2773*CHK* Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 27 Dec 05 05:35 LAG2 2 0 164 -2816 +-1387 -1972 +-1020 0*CHK* 7080 27 Dec 05 08:13 LAG1 2 0 1398 4284 +-4832 -2353 +-2001 0*CHK* 7080 29 Dec 05 01:44 LAG2 13 0 1685 -247 +- 40 -1065 +- 29 37*CHK* 7080 30 Dec 05 03:42 LAG2 13 0 401 87 +- 18 434 +- 20 126*CHK* Station 7090 (Yarragadee) (position fixed, acc. 10 mm) 7090 23 Dec 05 03:09 LAG2 12 0 81 -56 +- 25 22 +- 20 4 7090 23 Dec 05 16:47 LAG1 11 0 128 -40 +- 12 -215 +- 22 10*CHK* 7090 23 Dec 05 17:07 LAG2 9 0 297 299 +- 14 -78 +- 31 6*CHK* 7090 23 Dec 05 20:07 LAG1 13 0 69 57 +- 15 -7 +- 7 8 7090 23 Dec 05 20:53 LAG2 14 0 241 201 +- 12 -50 +- 8 21*CHK* 7090 23 Dec 05 23:55 LAG1 7 0 95 -70 +- 35 -28 +- 37 5 7090 24 Dec 05 01:15 LAG2 12 0 179 191 +- 13 133 +- 19 5*CHK* 7090 24 Dec 05 03:07 LAG1 6 0 343 373 +- 23 -82 +- 42 1*CHK* 7090 24 Dec 05 05:21 LAG2 10 0 342 330 +- 14 131 +- 7 51*CHK* 7090 24 Dec 05 06:36 LAG1 5 0 177 -19 +- 55 -127 +- 44 1 7090 26 Dec 05 23:40 LAG2 1 0 5278 0 +- 0 0 +- 0 0 7090 27 Dec 05 03:51 LAG2 4 0 355 25 +- 84 -396 +- 100 2*CHK* 7090 27 Dec 05 17:23 LAG2 3 0 10900 10864 +- 256 -23 +- 169 15*CHK* 7090 27 Dec 05 21:23 LAG2 9 0 706 -651 +- 20 58 +- 17 40*CHK* 7090 27 Dec 05 21:51 LAG1 3 0 1466 -1715 +- 250 -154 +- 153 0*CHK* 7090 28 Dec 05 01:40 LAG2 4 0 1254 1318 +- 200 44 +- 137 6*CHK* 7090 28 Dec 05 04:54 LAG1 3 0 169 -1188 +- 385 444 +- 165 2*CHK* 7090 28 Dec 05 16:55 LAG1 2 0 732 6580 +- 703 3923 +- 468 0*CHK* 7090 28 Dec 05 23:33 LAG2 16 0 471 -285 +- 14 -570 +- 13 30*CHK* 7090 29 Dec 05 00:05 LAG1 5 0 386 5 +- 28 838 +- 62 4*CHK* 7090 29 Dec 05 03:51 LAG2 7 0 254 -42 +- 110 -157 +- 59 5 7090 29 Dec 05 19:04 LAG1 18 0 282 -267 +- 10 -28 +- 5 31*CHK* 7090 30 Dec 05 02:05 LAG2 13 0 166 -42 +- 12 119 +- 10 104 7090 30 Dec 05 05:15 LAG1 12 0 735 479 +- 12 -432 +- 10 67*CHK* Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 29 Dec 05 05:25 LAG1 3 0 903 -910 +- 24 1052 +- 125 1*CHK* 7110 29 Dec 05 05:43 LAG2 2 0 416 -3002 +- 700 -2056 +- 553 0*CHK* 7110 29 Dec 05 23:21 LAG2 9 0 410 89 +- 15 -236 +- 9 3*CHK* 7110 30 Dec 05 00:31 LAG1 19 0 829 779 +- 9 186 +- 5 94*CHK* 7110 30 Dec 05 03:27 LAG2 16 2 167 159 +- 16 57 +- 12 123*CHK* 7110 30 Dec 05 07:29 LAG1 5 0 1007 1467 +- 31 -964 +- 45 5*CHK* 7110 30 Dec 05 07:47 LAG2 9 0 1905 417 +- 14 987 +- 7 26*CHK* Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 23 Dec 05 10:43 LAG1 4 0 444 -567 +- 97 778 +- 237 6*CHK* 7237 23 Dec 05 12:27 LAG2 5 0 446 429 +- 88 21 +- 78 30*CHK* 7237 23 Dec 05 13:59 LAG1 2 0 504 -679 +- 210 -249 +- 239 0*CHK* 7237 26 Dec 05 10:20 LAG1 1 0 1957 0 +- 0 0 +- 0 0 7237 26 Dec 05 11:02 LAG2 3 0 2332 6127 +-1922 -1823 +- 921 10*CHK* 7237 28 Dec 05 14:57 LAG2 3 0 1638 136 +-1046 1243 +- 733 1*CHK* 7237 28 Dec 05 17:29 LAG1 8 0 1534 -1126 +- 55 -355 +- 23 60*CHK* 7237 29 Dec 05 09:05 LAG2 8 0 1379 1232 +- 110 -1629 +- 77 55*CHK* 7237 29 Dec 05 09:29 LAG1 9 0 4782 4819 +- 51 908 +- 50 121*CHK* 7237 29 Dec 05 16:09 LAG1 11 0 509 -327 +- 46 -190 +- 22 12*CHK* 7237 29 Dec 05 19:49 LAG1 2 0 2895 3489 +-2342 410 +-1615 0*CHK* 7237 30 Dec 05 11:19 LAG2 7 0 3927 286 +- 179 2777 +- 136 23*CHK* Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 23 Dec 05 10:47 LAG1 4 0 512 -262 +- 81 -821 +- 186 9*CHK* 7249 23 Dec 05 12:19 LAG2 2 0 252 507 +- 538 1604 +-1185 0*CHK* 7249 29 Dec 05 13:15 LAG2 4 4 0 0 +- 0 0 +- 0 0 Station 7405 (Concepcion) (position solved, acc. 20 mm) 7405 29 Dec 05 07:56 LAG1 10 0 406 -509 +- 32 409 +- 21 21*CHK* Station 7501 (Hartebeesthoek) (position fixed, acc. 10 mm) 7501 23 Dec 05 01:40 LAG1 3 0 258 -571 +- 88 -821 +- 95 2*CHK* 7501 23 Dec 05 02:31 LAG2 12 0 241 -213 +- 17 -21 +- 10 8*CHK* 7501 24 Dec 05 03:55 LAG1 2 0 706 -716 +- 58 49 +- 268 0*CHK* 7501 27 Dec 05 02:45 LAG2 3 0 1388 -2561 +- 616 -1963 +- 306 3*CHK* 7501 27 Dec 05 07:14 LAG2 1 0 5091 0 +- 0 0 +- 0 0 Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 23 Dec 05 18:09 LAG1 11 0 465 145 +- 75 -380 +- 51 18*CHK* 7810 23 Dec 05 19:27 LAG2 19 0 791 183 +- 41 436 +- 23 89*CHK* 7810 23 Dec 05 21:25 LAG1 8 0 949 847 +- 78 -114 +- 55 58*CHK* 7810 23 Dec 05 23:39 LAG2 20 0 212 -223 +- 43 26 +- 23 5*CHK* 7810 24 Dec 05 00:47 LAG1 16 0 280 118 +- 46 125 +- 21 43*CHK* 7810 26 Dec 05 22:12 LAG2 2 0 1590 -688 +- 488 -4763 +-1035 0*CHK* 7810 29 Dec 05 12:32 LAG2 3 0 2636 2594 +- 200 213 +- 871 4*CHK* 7810 29 Dec 05 13:27 LAG1 14 0 374 -376 +- 54 4 +- 45 6*CHK* 7810 29 Dec 05 23:39 LAG1 19 0 1294 -1293 +- 42 -78 +- 21 82*CHK* 7810 30 Dec 05 00:11 LAG2 19 0 3033 2881 +- 42 511 +- 26 220*CHK* 7810 30 Dec 05 03:23 LAG1 18 0 1440 -668 +- 47 -790 +- 36 49*CHK* 7810 30 Dec 05 11:52 LAG1 16 0 5130 -2542 +- 46 -4368 +- 52 2936*CHK* Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 29 Dec 05 23:49 LAG1 15 0 519 -232 +- 48 -285 +- 32 41*CHK* Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 27 Dec 05 02:17 LAG2 3 0 3712 14 +- 121 -1957 +- 63 50*CHK* 7824 27 Dec 05 19:59 LAG2 8 0 3362 4810 +- 82 2090 +- 91 74*CHK* 7824 30 Dec 05 00:45 LAG2 8 0 1891 992 +- 174 466 +- 88 10*CHK* Station 7825 (Mount Stromlo) (position solved, acc. 10 mm) 7825 24 Dec 05 02:40 LAG1 7 0 80 -220 +- 57 -142 +- 31 8*CHK* 7825 24 Dec 05 15:07 LAG1 8 0 325 881 +- 40 771 +- 36 17*CHK* 7825 24 Dec 05 15:26 LAG2 5 0 159 155 +- 18 -39 +- 35 4*CHK* 7825 24 Dec 05 18:39 LAG1 14 0 169 -154 +- 11 23 +- 6 13*CHK* 7825 24 Dec 05 19:27 LAG2 16 0 509 -45 +- 14 380 +- 10 18*CHK* 7825 26 Dec 05 02:13 LAG2 9 0 161 920 +- 84 -480 +- 42 21*CHK* 7825 26 Dec 05 03:43 LAG1 2 0 1110 -1297 +- 106 -631 +- 343 0*CHK* 7825 27 Dec 05 02:03 LAG1 13 0 362 328 +- 20 -22 +- 11 38*CHK* 7825 27 Dec 05 04:31 LAG2 2 0 1548 5009 +-1397 -1660 +- 670 0*CHK* 7825 27 Dec 05 18:02 LAG1 7 0 1105 -741 +- 19 -801 +- 11 51*CHK* 7825 28 Dec 05 01:19 LAG1 2 0 6402 6345 +- 763 30 +- 397 0*CHK* 7825 28 Dec 05 04:25 LAG1 3 0 3031 -2205 +- 113 736 +- 99 6*CHK* 7825 28 Dec 05 16:55 LAG1 13 0 1007 606 +- 14 369 +- 10 117*CHK* 7825 28 Dec 05 19:37 LAG2 15 0 384 274 +- 18 380 +- 12 15*CHK* 7825 28 Dec 05 20:24 LAG1 5 0 196 202 +- 19 160 +- 43 2*CHK* 7825 28 Dec 05 23:47 LAG1 3 0 1014 -1074 +- 28 547 +- 131 2*CHK* 7825 29 Dec 05 00:11 LAG2 6 0 514 -585 +- 21 -285 +- 44 6*CHK* 7825 29 Dec 05 02:50 LAG1 2 0 1392 -4268 +-1130 -1066 +- 418 0*CHK* 7825 29 Dec 05 04:31 LAG2 6 3 6551 8795 +- 630 -1281 +- 359 0*CHK* 7825 29 Dec 05 15:18 LAG1 16 0 357 -338 +- 10 -58 +- 7 56*CHK* 7825 29 Dec 05 17:41 LAG2 18 0 800 718 +- 10 303 +- 5 137*CHK* 7825 29 Dec 05 18:48 LAG1 16 0 398 -22 +- 11 214 +- 5 34*CHK* 7825 29 Dec 05 21:55 LAG2 19 0 922 -378 +- 10 -870 +- 9 10*CHK* 7825 30 Dec 05 15:59 LAG2 19 0 190 -197 +- 10 41 +- 7 8*CHK* 7825 30 Dec 05 17:29 LAG1 19 0 702 -696 +- 9 -185 +- 5 12*CHK* 7825 30 Dec 05 19:55 LAG2 22 0 217 78 +- 8 94 +- 6 163*CHK* Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 23 Dec 05 15:32 LAG2 3 0 722 820 +- 678 58 +- 403 7*CHK* 7832 24 Dec 05 00:07 LAG2 11 0 788 681 +- 21 -257 +- 24 22*CHK* 7832 24 Dec 05 00:35 LAG1 11 0 494 550 +- 22 364 +- 22 25*CHK* 7832 24 Dec 05 14:05 LAG2 4 0 239 668 +- 315 -287 +- 207 3*CHK* 7832 24 Dec 05 22:33 LAG2 1 0 587 0 +- 0 0 +- 0 0 7832 24 Dec 05 23:10 LAG1 9 0 549 328 +- 35 510 +- 23 45*CHK* 7832 28 Dec 05 15:05 LAG1 2 0 2137 666 +- 698 -2498 +- 623 0*CHK* 7832 28 Dec 05 21:15 LAG1 7 0 398 819 +- 86 642 +- 50 26*CHK* 7832 29 Dec 05 10:07 LAG1 2 0 13069-13119 +- 51 1226 +- 535 0*CHK* 7832 29 Dec 05 13:21 LAG1 11 0 375 -355 +- 19 62 +- 12 68*CHK* 7832 30 Dec 05 21:59 LAG1 11 0 799 839 +- 22 366 +- 12 9*CHK* 7832 30 Dec 05 22:53 LAG2 8 0 2764 -3466 +- 30 -1352 +- 26 93*CHK* Station 7838 (Simosato Observatory) (position fixed, acc. 30 mm) 7838 27 Dec 05 13:00 LAG2 1 0 3471 0 +- 0 0 +- 0 0 7838 28 Dec 05 07:22 LAG1 2 0 1837 419 +- 724 -980 +- 500 0*CHK* 7838 28 Dec 05 15:02 LAG2 4 0 1141 610 +- 208 1188 +- 143 7*CHK* Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 23 Dec 05 02:31 LAG1 10 0 269 358 +- 26 -382 +- 19 2*CHK* 7839 30 Dec 05 15:22 LAG1 16 0 815 -703 +- 10 215 +- 5 135*CHK* 7839 30 Dec 05 18:10 LAG2 14 0 908 1033 +- 13 176 +- 6 53*CHK* 7839 30 Dec 05 18:55 LAG1 14 0 1026 -931 +- 11 -130 +- 6 85*CHK* 7839 30 Dec 05 22:17 LAG1 9 0 948 940 +- 14 25 +- 6 47*CHK* 7839 30 Dec 05 22:22 LAG2 8 0 781 -387 +- 15 -390 +- 7 20*CHK* Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 24 Dec 05 13:09 LAG1 4 0 540 651 +- 115 161 +- 159 2*CHK* 7840 24 Dec 05 17:31 LAG2 4 0 777 -1 +- 625 354 +- 285 0 7840 28 Dec 05 14:13 LAG2 4 0 2244 2137 +- 117 -138 +- 145 2*CHK* 7840 28 Dec 05 14:41 LAG1 5 0 116 -539 +- 215 -223 +- 108 3*CHK* 7840 28 Dec 05 17:57 LAG2 5 0 108 104 +- 258 98 +- 119 2 7840 28 Dec 05 18:49 LAG1 2 0 1376 1200 +-2317 -980 +- 881 0 7840 28 Dec 05 22:06 LAG1 1 0 396 0 +- 0 0 +- 0 0 7840 29 Dec 05 13:24 LAG1 12 0 343 -356 +- 19 69 +- 22 3*CHK* 7840 29 Dec 05 16:13 LAG2 12 0 1088 1172 +- 20 444 +- 21 19*CHK* 7840 29 Dec 05 16:54 LAG1 2 0 326 -1169 +-1364 -364 +- 589 0 7840 30 Dec 05 22:15 LAG2 12 0 489 382 +- 19 -103 +- 9 31*CHK* 7840 30 Dec 05 22:25 LAG1 11 0 407 376 +- 19 -72 +- 10 68*CHK* Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 25 Dec 05 15:13 LAG1 13 0 224 -33 +- 11 -126 +- 6 20 7841 25 Dec 05 15:47 LAG2 4 0 698 -1572 +- 234 -1262 +- 131 3*CHK* 7841 30 Dec 05 15:49 LAG1 8 0 229 -500 +- 51 151 +- 26 5*CHK* 7841 30 Dec 05 19:01 LAG1 12 0 226 42 +- 12 199 +- 10 9*CHK* Station 7941 (Matera) (position solved, acc. 10 mm) 7941 23 Dec 05 14:23 LAG1 12 0 161 -162 +- 32 -143 +- 15 14*CHK* 7941 23 Dec 05 16:01 LAG2 7 0 182 108 +- 148 33 +- 66 5 7941 23 Dec 05 17:59 LAG1 18 0 126 -91 +- 9 67 +- 6 10*CHK* 7941 23 Dec 05 19:33 LAG2 21 0 168 -165 +- 9 -39 +- 6 4*CHK* 7941 23 Dec 05 21:21 LAG1 10 0 163 21 +- 19 149 +- 16 3 7941 23 Dec 05 23:45 LAG2 9 0 189 -212 +- 17 -124 +- 10 20*CHK* 7941 24 Dec 05 00:41 LAG1 5 0 546 -184 +- 99 167 +- 45 2*CHK* 7941 24 Dec 05 13:05 LAG1 16 0 415 -323 +- 10 132 +- 7 7*CHK* 7941 24 Dec 05 13:41 LAG2 15 0 137 -66 +- 10 -114 +- 10 6*CHK* 7941 24 Dec 05 16:59 LAG1 6 0 192 536 +- 50 -377 +- 33 9*CHK* 7941 24 Dec 05 17:31 LAG2 27 0 157 147 +- 8 -33 +- 4 13*CHK* 7941 28 Dec 05 14:17 LAG2 2 0 1006 1117 +- 75 356 +- 220 0*CHK* 7941 28 Dec 05 18:01 LAG2 20 0 346 154 +- 10 153 +- 6 86*CHK* 7941 28 Dec 05 21:49 LAG1 3 0 492 497 +- 42 -14 +- 98 0*CHK* 7941 28 Dec 05 22:19 LAG2 22 0 250 133 +- 9 45 +- 5 184*CHK* 7941 29 Dec 05 01:29 LAG1 6 0 463 2311 +- 140 -1160 +- 61 32*CHK* -------------------------------------------------------------------------------- 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/ 55/ 0 179 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/ 16/ 3 45/ 32/ 5 153 6810 ZIMLAT 050701 - 051230 109/224/ 22 146/124/ 19 644 7080 MLRS25 050701 - 051230 7/ 76/ 2 10/ 67/ 3 165 7090 ML0514 050701 - 051230 198/154/ 33 164/221/ 19 789 7105 ML0725 050704 - 051221 14/100/ 11 22/ 61/ 7 215 7110 ML0414 050701 - 051230 47/189/ 29 55/ 97/ 9 426 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 - 051230 0/194/ 2 0/131/ 0 327 7249 BEJLAS 050703 - 051229 0/ 99/ 0 0/ 65/ 0 164 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 - 051227 25/ 46/ 5 15/ 64/ 5 160 7810 ZIMLAT 050701 - 051230 108/221/ 22 147/121/ 19 638 7811 POLLAS 050704 - 051230 0/ 89/ 0 0/ 23/ 0 112 7821 CHILAS 051213 - 051218 0/ 4/ 0 0/ 9/ 0 13 7824 SPNLAS 050701 - 051230 10/152/ 8 10/ 88/ 7 275 7825 STL3 050702 - 051230 304/118/ 24 161/175/ 23 805 7832 SALRO 050702 - 051231 95/227/ 25 105/166/ 20 638 7835 GRASSE 050701 - 050705 0/ 3/ 0 0/ 2/ 0 5 7838 SHOLAS 050714 - 051228 23/103/ 8 24/ 89/ 4 251 7839 AUSLAS 050702 - 051230 54/141/ 23 95/ 60/ 5 378 7840 RGOLAS 050702 - 051230 77/230/ 28 112/109/ 12 568 7841 GFZLA3 050713 - 051230 8/ 89/ 9 7/ 32/ 3 148 7848 FTLR06 050515 - 051027 6/ 48/ 2 5/ 22/ 4 87 7941 MLROnn 050701 - 051229 54/149/ 12 71/ 70/ 11 367 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) -------------------------------------------------------------- 051224.0 81.5 +/- 0.2 387.8 +/- 0.2 -32714.24 +/- 0.04 051225.0 76.2 +/- 0.2 402.7 +/- 0.4 -32712.42 +/- 0.08 051226.0 28.7 +/- 0.3 4.8 +/- 1.2 -32692.70 +/- 0.12 051227.0 -86.8 +/- 0.5 -4.0 +/- 0.4 -32690.08 +/- 0.17 051228.0 266.2 +/- 0.4 157.0 +/- 0.3 -32609.56 +/- 0.18 051229.0 1.5 +/- 0.2 284.7 +/- 0.2 -32545.66 +/- 0.19 051230.0 0.9 +/- 0.1 408.5 +/- 0.1 -32460.53 +/- 0.21 -------------------------------------------------------------- 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 ******************************************************************************** |