| Date: | 2001-10-23 06:45:00 | |
| Sender: | Ron Noomen, DEOS, Delft, The Netherlands <Ron Noomen <Ron.Noomen@lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 1305: Delft QL Report, October 23, 2001 | |
| Author: | Ron Noomen, DEOS, Delft, The Netherlands | |
| Content: | ******************************************************************************** SLR Electronic Report 2001-10-23 06:45:00 UTC Message No. 1305 ******************************************************************************** Author: Ron Noomen, DEOS, Delft, The Netherlands Subject: Delft QL Report, October 23, 2001 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS October 23, 2001 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, Oct 22, 2001. Questions and comments should be addressed to: K.F. Wakker Delft University of Technology Faculty of Aerospace Engineering Delft Institute for Earth-Oriented Space Research Kluyverweg 1 NL-2629 HS Delft The Netherlands Telephone: +31-(0)15-2782065/2785377 Telefax : +31-(0)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, Oct 22, 2001. 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 ------------------------------------------------------------------------------ 1863 Maidanak, Uzbekistan (site 1) 011006 - 011006 - 1 1884 Riga, Latvia 011016 - 011021 2 3 1893 Kazivili, Crimea, Ukraine 011015 - 011018 1 3 7080 McDonald Obs., Fort Davis, TX 011015 - 011022 6 5 7090 Yarragadee, Australia 011015 - 011017 8 6 7105 Greenbelt, Maryland 011015 - 011021 16 13 7110 Monument Peak, California 011016 - 011022 10 8 7210 Haleakala Obs., Maui, Hawaii 011016 - 011019 3 3 7237 Changchun, China 011015 - 011019 3 5 7356 Lhasa, China (TROS) 011015 - 011021 7 5 7403 Arequipa, Peru (TLRS-3) 011016 - 011019 3 3 7501 Hartebeesthoek, SA (MOB-6) 011016 - 011022 2 1 7810 Zimmerwald, Switzerland 011015 - 011022 21 14 7824 San Fernando, Spain 011015 - 011020 1 2 7832 Riyad, Saudi Arabia 011015 - 011022 11 16 7835 Grasse, France 011015 - 011022 13 9 7836 Potsdam, Germany 011016 - 011020 1 3 7837 Shanghai Observatory, China 011015 - 011021 4 6 7838 Simosato Observatory, Japan 011015 - 011020 1 3 7839 Graz, Austria 011014 - 011016 6 5 7840 Herstmonceux, United Kingdom 011015 - 011022 5 5 7845 Grasse, France (LLR) 011015 - 011022 5 4 8834 Wettzell, Germany 011015 - 011021 9 10 9999 011017 - 011017 1 0 ------ ------ --- --- TOTAL 011006 - 011022 139 133 ------------------------------------------------------------------------------ B. ANALYSIS RESULTS The analysis is based on two orbit solutions using global quick-look normal points that cover a period of 10 days which are computed simultaneously. This week´s data interval runs from Thu, Oct 11, 2001 to Sun, Oct 21, 2001. The measurement and dynamic models used in this analysis are close to the IERS Standard. The overall model is referred to as QLDACMOD9. The details of this model can be obtained on request. The terrestrial reference frame is provided by a special version of the SSC(DUT) 93L05 station coordinates solution. The general statistics and results of this week´s analysis are thus: ----------------------------------------------------------------------- Satellite LAGEOS-1 LAGEOS-2 Number of Stations 0 0 Number of Passes 0/ 0 0/ 0 Number of Normal Points 0/ 0 0000/ 0 RMS of Fit (mm) 0 0 ----------------------------------------------------------------------- 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) -------------------------------------------------------------------------------- Distribution of daytime, nighttime and twilight passes since Nov 1, 2000: -------------------------------------------------------------------------- Station System Period Number of Passes LAGEOS-1 LAGEOS-2 Day/Night/Twil. Day/Night/Twil. Total -------------------------------------------------------------------------- 1824 KIEVLA 010123 - 010806 0/ 47/ 0 0/ 22/ 0 69 1863 MDNLAS 010808 - 011006 0/ 7/ 0 0/ 2/ 0 9 1864 MD2LAS 001112 - 001223 0/ 5/ 0 0/ 8/ 0 13 1868 KOMLAS 010309 - 011012 0/ 11/ 0 0/ 6/ 0 17 1873 SIMLAS 001101 - 011014 0/ 45/ 0 0/ 52/ 0 97 1884 RIGLAS 001102 - 011021 0/ 75/ 8 0/ 40/ 4 127 1893 CRMLAS 001107 - 011018 0/ 52/ 0 0/ 41/ 0 93 7080 MLRS25 001102 - 011022 104/205/ 19 165/198/ 25 716 7090 ML0514 001101 - 011017 251/237/ 32 236/283/ 24 1063 7105 ML0725 001101 - 011021 116/352/ 27 112/283/ 27 917 7110 ML0414 001101 - 011022 58/421/ 25 59/337/ 31 931 7124 ML0819 001107 - 010613 0/ 29/ 0 0/ 22/ 2 53 7210 HOLLAS 001115 - 011019 11/120/ 1 14/103/ 8 257 7231 WUHA01 001103 - 010806 0/ 10/ 0 0/ 10/ 0 20 7237 CHALAS 001102 - 011019 0/256/ 1 0/216/ 1 474 7249 BEJLAS 001101 - 011004 0/111/ 0 0/ 91/ 0 202 7335 KASLAS 001108 - 010118 4/ 16/ 1 5/ 15/ 1 42 7339 TATLAS 001107 - 011012 53/ 32/ 0 35/ 26/ 3 149 7355 TROS01 010423 - 010605 0/ 40/ 0 0/ 3/ 0 43 7356 TROS01 010824 - 011021 0/ 44/ 0 0/ 34/ 0 78 7403 TLRS3 001101 - 011019 18/ 84/ 1 6/109/ 3 221 7501 ML0616 001101 - 011022 123/109/ 11 123/142/ 14 522 7548 CAGLAS 010718 - 010926 0/ 2/ 0 0/ 2/ 0 4 7806 METLAS 010209 - 011014 0/ 58/ 3 0/ 18/ 1 80 7810 ZIMLAT 001102 - 011022 173/155/ 22 121/113/ 21 605 7811 POLLAS 001103 - 011013 0/168/ 0 0/ 89/ 0 257 7820 YSLR01 001101 - 011013 0/155/ 2 0/176/ 1 334 7824 SPNLAS 001101 - 011020 2/116/ 2 2/101/ 2 225 7831 HELLAS 001101 - 001104 0/ 3/ 0 0/ 1/ 0 4 7832 SALRO 001211 - 011022 131/ 37/ 9 129/ 31/ 11 348 7835 GRASSE 001101 - 011022 86/293/ 27 77/216/ 15 714 7836 GFZLAS 001101 - 011020 7/168/ 9 6/107/ 9 306 7837 CHILAS 001102 - 011021 0/142/ 0 0/143/ 1 286 7838 SHOLAS 001107 - 011020 2/142/ 2 10/143/ 2 301 7839 AUSLAS 001102 - 011016 117/216/ 21 109/147/ 17 627 7840 RGOLAS 001102 - 011022 217/273/ 38 154/197/ 22 901 7845 GRASLL 001103 - 011022 88/101/ 13 74/ 66/ 5 347 7849 MSLO01 001101 - 011007 253/222/ 34 229/204/ 29 971 7939 SAO102 001101 - 001121 0/ 6/ 0 0/ 2/ 0 8 7941 MLROnn 010703 - 010912 29/ 13/ 1 10/ 10/ 2 65 8834 WLRS01 001101 - 011021 99/ 65/ 13 51/104/ 16 348 -------------------------------------------------------------------------- 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. D. COMMENTS 1. This is a QLDAC analysis report in a new style. Although our old report served quite well for observation campaigns, we have received many requests to adjust our report to the current situation (i.e. a permanent global SLR network with few mobile systems), and to spend more attention to the quality of the data taken by the global network. The most important element of the report is the table with statistics for each individual data pass. Although the numbers will speak for themselves, we must give a warning here that some of you may be disappointed to see that their station appears to be suffering from a data problem. However, we are using a model for station positions that is already 7 years old, and which may be responsible for errors in the station position in the order of 1-5 cm. We intend to introduce a new coordinates solution in the course of this millennium. Readers of this report are invited to provide us suggestions for further improvements. ”/DGFI3/home/slreport/mbox” complete From: Ron Noomen ******************************************************************************** |