| Date: | 2004-07-20 07:15:00 | |
| Sender: | Ron Noomen <Ron Noomen <ron@astro.lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 4111: Delft QL Report July 20, 2004 | |
| Author: | Ron Noomen | |
| Content: | ******************************************************************************** SLR Electronic Report 2004-07-20 07:15:00 UTC Message No. 4111 ******************************************************************************** Author: Ron Noomen Subject: Delft QL Report July 20, 2004 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS July 20, 2004 This is a weekly 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 Mon, Jul 19, 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 Mon, Jul 19, 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 ------------------------------------------------------------------------------ 1864 Maidanak, Uzbekistan (site 2) 040714 - 040718 5 2 1873 Simeiz, Crimea, Ukraine 040715 - 040718 4 2 1884 Riga, Latvia 040712 - 040717 3 - 1893 Kazivili, Crimea, Ukraine 040715 - 040718 3 4 7237 Changchun, China 040707 - 040717 9 5 7249 Beijing, China 040705 - 040713 6 6 7355 Urumqi, China (TROS) 040714 - 040717 6 5 7810 Zimmerwald 423, Switzerland 040714 - 040719 11 8 7824 San Fernando, Spain 040712 - 040714 1 2 7832 Riyad, Saudi Arabia 040712 - 040719 8 9 7835 Grasse, France 040712 - 040712 1 - 7837 Shanghai Observatory, China 040715 - 040719 2 2 7839 Graz, Austria 040712 - 040719 10 4 7840 Herstmonceux, United Kingdom 040712 - 040719 5 5 7845 Grasse, France (LLR) 040712 - 040712 1 - 7941 Matera, Italy (MLRO 532) 040713 - 040719 20 20 8834 Wettzell, Germany 040716 - 040719 13 7 ------ ------ --- --- TOTAL 040705 - 040719 108 81 ------------------------------------------------------------------------------ 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, Jul 10, 2004 to Sun, Jul 18, 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 19 16 Number of Passes 106/ 98 79/ 74 Number of Normal Points 964/ 903 0821/ 748 Weighted RMS of Fit (mm) 306 273 ----------------------------------------------------------------------- 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 10 Jul 04 20:55 LAG1 5 0 261 34 +- 327 154 +- 180 10 1864 14 Jul 04 18:37 LAG2 4 0 451 -93 +-1668 349 +-1628 22 1864 15 Jul 04 17:51 LAG1 3 0 523 901 +-1221 626 +-1876 4 1864 16 Jul 04 19:45 LAG1 9 0 107 -59 +- 207 36 +- 103 17 1864 17 Jul 04 18:37 LAG1 6 0 1098 -443 +- 250 -864 +- 235 15*CHK* Station 1873 (Simeiz) (position fixed, acc. 200 mm) 1873 10 Jul 04 21:36 LAG1 1 0 352 0 +- 0 0 +- 0 0 1873 11 Jul 04 19:53 LAG1 4 0 602 1092 +-1348 425 +-1079 140 1873 15 Jul 04 21:27 LAG1 4 0 982 142 +-1237 828 +- 915 37 1873 16 Jul 04 22:46 LAG2 8 0 346 217 +- 274 111 +- 199 81 1873 16 Jul 04 23:35 LAG1 7 0 649 570 +- 249 -122 +- 200 25*CHK* 1873 17 Jul 04 20:55 LAG2 10 2 1958 1938 +- 212 -322 +- 389 175*CHK* 1873 17 Jul 04 22:19 LAG1 4 0 1626 453 +- 300 -1438 +- 279 64*CHK* Station 1884 (Riga) (position fixed, acc. 100 mm) 1884 12 Jul 04 22:15 LAG1 9 0 111 -119 +- 116 18 +- 118 3 1884 15 Jul 04 21:33 LAG1 13 0 1176 -87 +- 83 930 +- 66 25*CHK* 1884 17 Jul 04 22:21 LAG1 12 0 1906 348 +- 91 -1505 +- 77 28*CHK* Station 1893 (Kazivili) (position fixed, acc. 100 mm) 1893 10 Jul 04 21:05 LAG1 13 0 169 168 +- 98 119 +- 66 32*CHK* 1893 10 Jul 04 21:59 LAG2 7 0 17 -32 +- 340 -16 +- 289 8 1893 15 Jul 04 20:37 LAG2 10 0 1943 -1519 +- 113 902 +- 159 29*CHK* 1893 15 Jul 04 21:15 LAG1 10 0 1959 70 +- 329 949 +- 154 13*CHK* 1893 16 Jul 04 20:01 LAG1 11 0 121 -96 +- 122 25 +- 92 7 1893 16 Jul 04 22:35 LAG2 8 0 256 -27 +- 367 149 +- 238 14 1893 17 Jul 04 20:57 LAG2 5 0 1581 1532 +- 156 -253 +- 431 10*CHK* Station 7080 (McDonald Obs.) (position fixed, acc. 20 mm) 7080 11 Jul 04 17:53 LAG2 4 0 390 -298 +- 51 503 +- 45 1*CHK* Station 7110 (Monument Peak) (position fixed, acc. 10 mm) 7110 10 Jul 04 03:03 LAG1 6 0 42 56 +- 26 -103 +- 42 5 7110 10 Jul 04 06:07 LAG1 14 0 77 -73 +- 11 21 +- 6 20*CHK* 7110 10 Jul 04 09:40 LAG1 12 0 76 -82 +- 14 9 +- 8 16*CHK* Station 7237 (Changchun) (position fixed, acc. 50 mm) 7237 10 Jul 04 13:45 LAG1 6 0 345 357 +- 64 63 +- 52 14*CHK* 7237 10 Jul 04 14:38 LAG2 3 0 17 -1 +- 258 30 +- 524 3 7237 11 Jul 04 12:37 LAG1 7 0 364 411 +- 72 -97 +- 79 14*CHK* 7237 12 Jul 04 14:39 LAG1 10 0 25 -12 +- 51 -12 +- 40 6 7237 12 Jul 04 14:55 LAG2 9 0 148 -311 +- 108 197 +- 84 16*CHK* 7237 12 Jul 04 18:00 LAG1 12 0 187 -198 +- 50 -18 +- 35 14*CHK* 7237 12 Jul 04 18:38 LAG2 19 0 195 -103 +- 35 129 +- 27 8*CHK* 7237 13 Jul 04 13:10 LAG1 12 0 113 63 +- 44 -70 +- 31 9 7237 15 Jul 04 14:03 LAG1 7 0 553 -542 +- 59 -294 +- 58 13*CHK* 7237 17 Jul 04 14:55 LAG1 2 0 166 -210 +-1192 -528 +-1682 0 Station 7249 (Beijing) (position solved, acc. 50 mm) 7249 12 Jul 04 14:33 LAG1 11 0 98 65 +- 56 -37 +- 47 8 7249 12 Jul 04 14:54 LAG2 2 0 229 -230 +- 302 5 +-1758 0 7249 12 Jul 04 17:59 LAG1 19 0 123 8 +- 35 -79 +- 23 21 7249 12 Jul 04 18:37 LAG2 18 0 109 62 +- 37 58 +- 29 14 7249 13 Jul 04 16:49 LAG2 13 1 210 -223 +- 47 125 +- 47 13*CHK* Station 7355 (Urumqi) (position solved, acc. 10 mm) 7355 10 Jul 04 17:31 LAG1 7 4 84 -61 +- 30 73 +- 69 4 7355 10 Jul 04 18:23 LAG2 8 1 186 -150 +- 16 -265 +- 27 22*CHK* 7355 11 Jul 04 16:09 LAG1 11 1 78 -75 +- 13 48 +- 14 7*CHK* 7355 11 Jul 04 19:31 LAG1 18 3 86 87 +- 12 3 +- 8 15*CHK* 7355 11 Jul 04 20:19 LAG2 19 0 55 -34 +- 9 -23 +- 6 25 7355 12 Jul 04 18:09 LAG1 14 1 122 -88 +- 14 -102 +- 9 13*CHK* 7355 12 Jul 04 18:36 LAG2 10 2 274 -252 +- 15 -90 +- 26 16*CHK* 7355 14 Jul 04 15:41 LAG1 8 3 76 -69 +- 20 -9 +- 37 26 7355 14 Jul 04 18:47 LAG2 8 5 173 20 +- 136 -260 +- 183 3 7355 14 Jul 04 19:11 LAG1 9 0 71 -75 +- 18 13 +- 16 24*CHK* 7355 15 Jul 04 16:57 LAG2 10 6 206 41 +- 34 423 +- 84 25*CHK* 7355 15 Jul 04 17:37 LAG1 13 0 80 -52 +- 12 27 +- 9 28 7355 15 Jul 04 20:45 LAG2 17 0 72 36 +- 10 57 +- 8 9 7355 16 Jul 04 16:19 LAG1 11 1 135 -120 +- 13 66 +- 13 13*CHK* 7355 16 Jul 04 18:55 LAG2 18 1 113 -97 +- 10 62 +- 8 22*CHK* 7355 16 Jul 04 19:59 LAG1 8 5 311 340 +- 49 -62 +- 90 8*CHK* 7355 17 Jul 04 15:07 LAG1 6 3 343 -568 +- 84 -377 +- 131 9*CHK* 7355 17 Jul 04 17:05 LAG2 11 3 321 271 +- 16 -116 +- 22 12*CHK* Station 7810 (Zimmerwald 423) (position fixed, acc. 60 mm) 7810 10 Jul 04 14:23 LAG1 16 0 75 -73 +- 46 10 +- 21 18 7810 10 Jul 04 17:57 LAG1 2 0 65 -87 +-4032 -12 +-2353 0 7810 11 Jul 04 10:01 LAG2 12 0 319 215 +- 52 164 +- 37 17*CHK* 7810 14 Jul 04 08:57 LAG2 4 0 485 193 +-1816 134 +- 838 0 7810 14 Jul 04 12:39 LAG1 9 0 143 -179 +- 81 153 +- 74 9*CHK* 7810 14 Jul 04 15:55 LAG1 12 0 275 -208 +- 62 65 +- 40 12*CHK* 7810 14 Jul 04 19:21 LAG1 20 0 183 -183 +- 40 -5 +- 25 14*CHK* 7810 15 Jul 04 14:31 LAG1 15 0 1126 515 +- 50 -419 +- 25 25*CHK* 7810 15 Jul 04 18:17 LAG1 10 0 2783 2573 +- 69 330 +- 66 62*CHK* 7810 15 Jul 04 21:25 LAG1 17 0 2289 624 +- 44 1051 +- 21 73*CHK* 7810 16 Jul 04 00:15 LAG2 21 0 1662 -1262 +- 41 514 +- 27 104*CHK* 7810 16 Jul 04 00:57 LAG1 17 0 1867 362 +- 44 1229 +- 30 30*CHK* 7810 16 Jul 04 04:19 LAG2 17 0 1208 715 +- 55 -399 +- 36 239*CHK* 7810 16 Jul 04 08:37 LAG2 19 0 2016 -129 +- 44 -1446 +- 32 59*CHK* 7810 16 Jul 04 13:23 LAG1 18 0 306 -147 +- 51 -113 +- 29 9*CHK* 7810 16 Jul 04 16:43 LAG1 10 0 396 508 +- 92 104 +- 59 32*CHK* 7810 17 Jul 04 02:41 LAG2 3 0 125 148 +- 129 91 +- 228 1 7810 17 Jul 04 06:49 LAG2 8 0 457 458 +- 65 22 +- 94 23*CHK* 7810 17 Jul 04 10:49 LAG2 9 0 167 63 +- 62 -195 +- 73 33 7810 17 Jul 04 11:49 LAG1 19 1 869 861 +- 43 -125 +- 28 112*CHK* Station 7811 (Borowiec) (position fixed, acc. 60 mm) 7811 10 Jul 04 00:00 LAG2 11 0 108 128 +- 66 -98 +- 72 7*CHK* Station 7824 (San Fernando) (position fixed, acc. 40 mm) 7824 10 Jul 04 21:33 LAG1 5 0 51 60 +- 66 -37 +- 108 4 7824 12 Jul 04 22:23 LAG1 8 0 47 89 +- 102 -36 +- 72 3 7824 14 Jul 04 00:01 LAG2 7 0 412 -356 +- 152 45 +- 119 6*CHK* 7824 14 Jul 04 04:03 LAG2 5 0 80 43 +- 408 78 +- 263 5 Station 7832 (Riyad) (position solved, acc. 20 mm) 7832 10 Jul 04 04:11 LAG2 15 0 40 -13 +- 17 45 +- 23 8 7832 10 Jul 04 14:33 LAG1 7 0 231 -174 +- 29 -150 +- 50 4*CHK* 7832 10 Jul 04 20:55 LAG1 13 0 106 61 +- 18 44 +- 10 22 7832 10 Jul 04 21:43 LAG2 11 0 109 -147 +- 48 -25 +- 28 7*CHK* 7832 11 Jul 04 00:39 LAG1 6 0 49 -51 +- 28 50 +- 80 4 7832 11 Jul 04 02:05 LAG2 7 0 166 -129 +- 72 45 +- 84 1*CHK* 7832 11 Jul 04 06:21 LAG2 11 0 210 -144 +- 48 49 +- 34 2*CHK* 7832 11 Jul 04 19:33 LAG1 11 0 269 279 +- 20 61 +- 13 18*CHK* 7832 11 Jul 04 20:07 LAG2 7 0 117 -61 +- 25 180 +- 54 1 7832 12 Jul 04 18:33 LAG1 3 0 100 137 +- 66 -111 +- 138 16*CHK* 7832 12 Jul 04 21:47 LAG1 10 0 100 -104 +- 21 -25 +- 18 5*CHK* 7832 12 Jul 04 22:21 LAG2 11 0 167 -85 +- 42 169 +- 30 1 7832 13 Jul 04 02:20 LAG2 7 0 103 -114 +- 77 -13 +- 88 2 7832 13 Jul 04 20:27 LAG1 6 0 112 -104 +- 57 -185 +- 54 5 7832 14 Jul 04 18:29 LAG2 7 0 33 -18 +- 24 85 +- 78 3 7832 14 Jul 04 19:17 LAG1 8 0 231 297 +- 37 -98 +- 38 1*CHK* 7832 15 Jul 04 07:05 LAG2 5 1 74 82 +- 37 -39 +- 27 4 7832 16 Jul 04 20:09 LAG1 9 0 315 -326 +- 73 5 +- 39 6*CHK* 7832 17 Jul 04 02:51 LAG2 8 0 527 1235 +- 85 743 +- 80 17*CHK* 7832 17 Jul 04 07:03 LAG2 8 0 572 478 +- 102 -56 +- 60 19*CHK* 7832 17 Jul 04 18:43 LAG1 4 0 1308 -1207 +- 33 -1168 +- 117 2*CHK* Station 7835 (Grasse) (position fixed, acc. 30 mm) 7835 12 Jul 04 22:07 LAG1 19 0 14 -1 +- 25 -4 +- 14 11 Station 7837 (Shanghai Observatory) (position fixed, acc. 50 mm) 7837 11 Jul 04 15:53 LAG1 13 0 232 194 +- 44 59 +- 34 15*CHK* 7837 11 Jul 04 16:33 LAG2 15 0 239 -77 +- 48 218 +- 38 7*CHK* 7837 15 Jul 04 17:01 LAG2 9 0 964 -134 +- 71 -542 +- 44 10*CHK* 7837 16 Jul 04 16:07 LAG1 13 0 126 -134 +- 45 37 +- 34 15*CHK* Station 7839 (Graz) (position fixed, acc. 10 mm) 7839 11 Jul 04 16:35 LAG1 12 0 18 11 +- 12 13 +- 11 6 7839 12 Jul 04 04:25 LAG2 7 0 66 -4 +- 42 52 +- 31 2 7839 12 Jul 04 22:09 LAG1 5 0 31 -20 +- 37 13 +- 41 0 7839 14 Jul 04 16:09 LAG1 2 0 201 -164 +- 190 54 +- 275 0 7839 15 Jul 04 15:04 LAG1 4 0 115 1204 +- 227 -537 +- 99 2*CHK* 7839 16 Jul 04 13:19 LAG1 9 0 209 37 +- 14 -127 +- 8 12 7839 16 Jul 04 20:07 LAG1 14 0 172 -175 +- 11 -8 +- 7 8*CHK* 7839 16 Jul 04 22:27 LAG2 24 0 102 -90 +- 8 -20 +- 5 16*CHK* 7839 16 Jul 04 23:47 LAG1 16 0 440 177 +- 14 -289 +- 7 46*CHK* 7839 17 Jul 04 02:23 LAG2 16 0 135 252 +- 21 160 +- 12 19*CHK* 7839 17 Jul 04 18:48 LAG1 7 0 578 -1497 +- 46 -1098 +- 30 11*CHK* Station 7840 (Herstmonceux) (position fixed, acc. 20 mm) 7840 10 Jul 04 07:45 LAG2 15 0 67 -63 +- 17 -19 +- 12 8 7840 10 Jul 04 11:53 LAG2 13 1 89 -63 +- 19 23 +- 24 59 7840 10 Jul 04 17:55 LAG1 16 0 98 -96 +- 16 8 +- 10 16*CHK* 7840 12 Jul 04 22:13 LAG1 5 0 63 -57 +- 81 5 +- 70 3 7840 13 Jul 04 06:03 LAG2 18 0 209 -125 +- 17 94 +- 13 8*CHK* 7840 14 Jul 04 00:09 LAG2 11 0 388 -391 +- 20 118 +- 14 32*CHK* 7840 14 Jul 04 00:11 LAG1 11 0 321 -137 +- 20 -189 +- 12 10*CHK* Station 7841 (Potsdam) (position solved, acc. 10 mm) 7841 10 Jul 04 21:21 LAG1 14 0 2 0 +- 11 0 +- 8 2 Station 7845 (Grasse) (position fixed, acc. 20 mm) 7845 12 Jul 04 22:15 LAG1 11 0 17 18 +- 28 -2 +- 20 6 Station 7941 (Matera) (position solved, acc. 10 mm) 7941 10 Jul 04 00:05 LAG2 8 0 217 602 +- 52 -299 +- 35 12*CHK* 7941 10 Jul 04 02:25 LAG1 2 0 335 368 +- 109 -95 +- 300 0*CHK* 7941 10 Jul 04 10:50 LAG1 9 0 106 -81 +- 14 44 +- 10 6*CHK* 7941 10 Jul 04 14:21 LAG1 9 0 189 552 +- 49 203 +- 23 24*CHK* 7941 10 Jul 04 17:49 LAG1 6 0 57 280 +- 84 168 +- 51 5*CHK* 7941 10 Jul 04 21:47 LAG1 2 0 178 950 +-2369 -297 +- 914 0 7941 10 Jul 04 21:59 LAG2 6 0 184 123 +- 17 -171 +- 21 3*CHK* 7941 11 Jul 04 02:25 LAG2 7 0 111 1038 +- 209 -504 +- 94 8*CHK* 7941 11 Jul 04 06:05 LAG2 9 0 257 264 +- 26 9 +- 25 9*CHK* 7941 11 Jul 04 13:01 LAG1 6 0 116 572 +- 114 224 +- 52 7*CHK* 7941 13 Jul 04 06:07 LAG2 15 0 137 252 +- 24 93 +- 15 16*CHK* 7941 13 Jul 04 13:46 LAG1 5 1 151 394 +- 277 222 +- 113 2*CHK* 7941 13 Jul 04 17:16 LAG1 9 0 132 -84 +- 28 38 +- 21 3*CHK* 7941 13 Jul 04 20:47 LAG1 5 0 88 32 +- 29 -84 +- 41 0 7941 14 Jul 04 00:07 LAG2 11 0 228 217 +- 12 24 +- 9 44*CHK* 7941 14 Jul 04 04:29 LAG2 6 0 261 254 +- 19 -28 +- 45 3*CHK* 7941 14 Jul 04 08:33 LAG2 3 0 263 646 +- 231 301 +- 179 0*CHK* 7941 14 Jul 04 19:21 LAG1 16 0 233 141 +- 10 119 +- 7 78*CHK* 7941 14 Jul 04 22:13 LAG2 23 0 211 181 +- 8 -80 +- 6 42*CHK* 7941 14 Jul 04 23:03 LAG1 9 0 235 433 +- 33 -146 +- 20 12*CHK* 7941 15 Jul 04 02:21 LAG2 3 0 685 871 +- 377 122 +- 246 0*CHK* 7941 15 Jul 04 14:37 LAG1 1 0 58773 0 +- 0 0 +- 0 0 7941 15 Jul 04 18:07 LAG1 9 0 20270 2948 +- 17 24385 +- 19 63*CHK* 7941 16 Jul 04 00:41 LAG2 11 0 38447 155 +- 32 23889 +- 20 38*CHK* 7941 16 Jul 04 04:25 LAG2 8 0 30925 2249 +- 28 23528 +- 20 99*CHK* 7941 16 Jul 04 08:49 LAG2 4 0 19687 463 +- 78 22296 +- 87 3*CHK* 7941 16 Jul 04 13:13 LAG1 9 0 49299 956 +- 52 23782 +- 24 26*CHK* 7941 16 Jul 04 16:43 LAG1 5 0 44581 1336 +- 133 24097 +- 70 7*CHK* 7941 16 Jul 04 22:49 LAG2 8 0 27434 304 +- 35 23510 +- 31 8*CHK* 7941 16 Jul 04 23:53 LAG1 7 0 49674 772 +- 38 23166 +- 18 30*CHK* 7941 17 Jul 04 02:35 LAG2 10 0 23734 638 +- 21 23812 +- 21 19*CHK* 7941 17 Jul 04 06:43 LAG2 11 0 32497 1204 +- 29 23894 +- 20 57*CHK* 7941 17 Jul 04 10:46 LAG2 10 0 19739 298 +- 21 23548 +- 25 27*CHK* 7941 17 Jul 04 18:56 LAG1 13 0 26829 -1522 +- 14 22681 +- 11 26*CHK* 7941 17 Jul 04 20:47 LAG2 13 0 16556 2302 +- 12 22887 +- 17 62*CHK* 7941 17 Jul 04 22:19 LAG1 11 0 24181 25 +- 12 22035 +- 11 18*CHK* Station 8834 (Wettzell) (position fixed, acc. 10 mm) 8834 10 Jul 04 00:07 LAG2 8 0 56 152 +- 41 -116 +- 30 1*CHK* 8834 10 Jul 04 02:23 LAG1 7 0 109 -106 +- 16 20 +- 36 5*CHK* 8834 10 Jul 04 04:05 LAG2 9 0 57 -37 +- 26 -19 +- 24 2 8834 10 Jul 04 18:07 LAG1 10 0 44 -9 +- 27 -22 +- 17 9 8834 10 Jul 04 21:21 LAG1 7 0 54 60 +- 18 42 +- 16 9 8834 10 Jul 04 22:14 LAG2 1 0 88 0 +- 0 0 +- 0 0 8834 11 Jul 04 00:53 LAG1 1 0 40 0 +- 0 0 +- 0 0 8834 11 Jul 04 01:51 LAG2 9 0 16 -43 +- 37 -30 +- 26 2 8834 11 Jul 04 16:37 LAG1 7 0 43 -26 +- 18 24 +- 20 3 8834 16 Jul 04 00:03 LAG1 4 4 0 0 +- 0 0 +- 0 0 8834 16 Jul 04 13:15 LAG1 9 0 91 -83 +- 27 -106 +- 18 4*CHK* 8834 16 Jul 04 17:05 LAG1 4 0 451 525 +- 90 -59 +- 70 3*CHK* 8834 16 Jul 04 22:35 LAG2 13 0 147 -132 +- 11 -35 +- 8 7*CHK* 8834 16 Jul 04 23:55 LAG1 5 1 104 165 +- 33 -233 +- 64 3*CHK* 8834 17 Jul 04 02:35 LAG2 19 0 133 109 +- 9 6 +- 7 73*CHK* 8834 17 Jul 04 06:45 LAG2 22 0 349 337 +- 10 -168 +- 6 145*CHK* 8834 17 Jul 04 10:39 LAG2 12 0 257 -30 +- 12 -229 +- 11 73*CHK* 8834 17 Jul 04 12:17 LAG1 8 0 436 1130 +- 85 -339 +- 40 22*CHK* 8834 17 Jul 04 15:31 LAG1 9 0 429 -355 +- 14 -379 +- 15 10*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 040314 - 040704 0/ 11/ 0 0/ 1/ 0 12 1863 MDNLAS 040103 - 040117 0/ 2/ 0 0/ 4/ 0 6 1864 MD2LAS 040102 - 040718 0/ 92/ 0 0/ 28/ 0 120 1868 KOMLAS 040315 - 040614 0/ 15/ 0 0/ 3/ 0 18 1873 SIMLAS 040118 - 040718 0/ 33/ 0 0/ 10/ 0 43 1884 RIGLAS 040310 - 040717 0/ 43/ 0 0/ 3/ 0 46 1893 CRMLAS 040331 - 040718 0/ 26/ 0 0/ 12/ 0 38 6405 TIGO 040103 - 040226 1/ 10/ 2 1/ 0/ 0 14 6810 ZIMLAT 040107 - 040621 93/161/ 22 116/ 79/ 8 479 7080 MLRS25 040104 - 040711 36/ 67/ 12 52/ 56/ 5 228 7090 ML0514 040101 - 040629 162/157/ 40 115/236/ 24 734 7105 ML0725 040104 - 040709 20/ 54/ 7 4/ 39/ 5 129 7110 ML0414 040102 - 040710 72/150/ 14 85/ 78/ 11 410 7124 ML0819 040315 - 040708 0/ 5/ 0 0/ 10/ 0 15 7210 HOLLAS 040105 - 040607 33/ 49/ 3 50/ 52/ 6 193 7231 WUHA01 040408 - 040701 0/ 0/ 0 0/ 2/ 0 2 7237 CHALAS 040101 - 040717 0/248/ 6 0/121/ 2 377 7249 BEJLAS 040101 - 040713 0/177/ 1 0/125/ 0 303 7308 CRLLAS 040106 - 040311 5/ 47/ 0 0/ 38/ 2 92 7355 TROS02 040509 - 040717 0/ 60/ 0 0/ 15/ 0 75 7405 TIGO 040103 - 040215 0/ 9/ 2 0/ 0/ 0 11 7501 ML0616 040106 - 040706 53/ 50/ 18 42/106/ 10 279 7810 ZIMLAT 040507 - 040719 74/ 59/ 16 85/ 8/ 7 249 7811 POLLAS 040105 - 040710 0/ 81/ 0 0/ 22/ 0 103 7823 FTLR** 040612 - 040626 0/ 9/ 0 1/ 1/ 1 12 7824 SPNLAS 040109 - 040714 0/ 86/ 0 0/ 50/ 1 137 7832 SALRO 040102 - 040719 81/203/ 23 140/155/ 23 625 7835 GRASSE 040301 - 040712 1/ 53/ 3 0/ 24/ 1 82 7836 GFZLAS 040105 - 040701 0/ 38/ 0 0/ 21/ 1 60 7837 CHILAS 040102 - 040719 0/ 33/ 0 0/ 31/ 0 64 7838 SHOLAS 040105 - 040709 20/153/ 2 42/105/ 7 329 7839 AUSLAS 040107 - 040719 43/119/ 16 47/ 62/ 6 293 7840 RGOLAS 040102 - 040719 82/173/ 30 94/ 78/ 14 471 7841 GFZLA3 040112 - 040710 14/ 55/ 10 12/ 22/ 5 118 7845 GRASLL 040318 - 040712 2/ 15/ 0 9/ 2/ 0 28 7941 MLROnn 040111 - 040719 90/130/ 21 94/ 94/ 7 436 8834 WLRS01 040108 - 040719 116/134/ 33 125/ 71/ 12 491 -------------------------------------------------------------------------- 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) -------------------------------------------------------------- 040711.0 21.2 +/- 0.2 511.4 +/- 0.3 -32517.52 +/- 0.05 040712.0 26.3 +/- 0.3 509.6 +/- 0.3 -32516.99 +/- 0.08 040713.0 31.9 +/- 0.3 513.4 +/- 0.3 -32516.76 +/- 0.11 040714.0 29.8 +/- 0.3 508.9 +/- 0.5 -32516.13 +/- 0.15 040715.0 33.0 +/- 0.3 508.0 +/- 0.4 -32516.63 +/- 0.18 040716.0 31.1 +/- 0.3 502.6 +/- 0.4 -32517.91 +/- 0.21 040717.0 33.4 +/- 0.2 503.7 +/- 0.4 -32519.70 +/- 0.25 -------------------------------------------------------------- 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, 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 ******************************************************************************** |