| Date: | 2002-10-08 06:45:00 | |
| Sender: | Ron Noomen, DEOS, Delft, The Netherlands <Ron Noomen <Ron.Noomen@lr.tudelft.nl>> | |
| Subject: | [SLR-Report] No. 2203: Delft QL Report, October 08, 2002 | |
| Author: | Ron Noomen, DEOS, Delft, The Netherlands | |
| Content: | ******************************************************************************** SLR Electronic Report 2002-10-08 06:45:00 UTC Message No. 2203 ******************************************************************************** Author: Ron Noomen, DEOS, Delft, The Netherlands Subject: Delft QL Report, October 08, 2002 WEGENER-2 IERS REPORT OF THE QUICK-LOOK DATA ANALYSIS CENTER DELFT UNIVERSITY OF TECHNOLOGY FACULTY OF AEROSPACE ENGINEERING THE NETHERLANDS October 8, 2002 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 7, 2002. 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 7, 2002. 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) 020923 - 021004 12 8 1873 Simeiz, Crimea, Ukraine 021003 - 021003 1 1 1884 Riga, Latvia 021002 - 021004 3 - 1893 Kazivili, Crimea, Ukraine 020930 - 020930 1 1 7080 McDonald Obs., Fort Davis, TX 020930 - 021006 8 7 7090 Yarragadee, Australia 021001 - 021006 9 13 7105 Greenbelt, Maryland 020929 - 021006 16 8 7110 Monument Peak, California 021001 - 021007 16 12 7124 Papeete, Tahiti 021002 - 021004 - 3 7210 Haleakala Obs., Maui, Hawaii 020930 - 021007 8 9 7237 Changchun, China 020930 - 021002 5 3 7403 Arequipa, Peru (TLRS-3) 021001 - 021007 1 4 7405 Concepcion, Chile (TIGO) 020929 - 020929 - 1 7806 Metsahovi, Finland 021001 - 021003 3 - 7824 San Fernando, Spain 021003 - 021007 4 3 7832 Riyad, Saudi Arabia 020930 - 021007 7 2 7835 Grasse, France 020930 - 021003 3 2 7836 Potsdam, Germany 020930 - 021001 2 2 7837 Shanghai Observatory, China 021004 - 021007 3 - 7838 Simosato Observatory, Japan 021005 - 021005 1 1 7839 Graz, Austria 020930 - 021002 12 9 7840 Herstmonceux, United Kingdom 020930 - 021007 14 10 7845 Grasse, France (LLR) 020930 - 021001 2 - 7849 Mount Stromlo, Australia 021001 - 021006 5 4 8834 Wettzell, Germany 020930 - 021007 10 7 ------ ------ --- --- TOTAL 020923 - 021007 146 110 ------------------------------------------------------------------------------ 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, Sep 26, 2002 to Sun, Oct 6, 2002. 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 Jan 1, 2002: -------------------------------------------------------------------------- Station System Period Number of Passes LAGEOS-1 LAGEOS-2 Day/Night/Twil. Day/Night/Twil. Total -------------------------------------------------------------------------- 1824 KIEVLA 020311 - 020705 0/ 6/ 0 0/ 4/ 0 10 1831 LVIL 020507 - 020905 0/ 11/ 0 0/ 3/ 0 14 1863 MDNLAS 020524 - 020922 0/ 47/ 0 0/ 15/ 0 62 1864 MD2LAS 020311 - 021004 0/ 50/ 0 0/ 35/ 0 85 1868 KOMLAS 020119 - 020717 0/ 13/ 0 0/ 7/ 0 20 1873 SIMLAS 020312 - 021003 0/ 24/ 0 0/ 28/ 0 52 1884 RIGLAS 020203 - 021004 0/ 97/ 1 0/ 63/ 0 161 1893 CRMLAS 020305 - 020930 0/ 34/ 0 0/ 20/ 0 54 7080 MLRS25 020105 - 021006 111/128/ 12 129/126/ 10 516 7090 ML0514 020101 - 021006 222/331/ 40 191/250/ 25 1059 7105 ML0725 020104 - 021006 82/210/ 27 72/147/ 16 554 7110 ML0414 020105 - 021007 69/352/ 35 56/267/ 24 803 7124 ML0819 020113 - 021004 0/ 81/ 0 0/ 61/ 0 142 7210 HOLLAS 020104 - 021007 36/ 74/ 4 45/ 81/ 7 247 7237 CHALAS 020101 - 021002 0/208/ 0 0/139/ 2 349 7249 BEJLAS 020116 - 020928 0/ 58/ 0 0/ 53/ 0 111 7403 TLRS3 020108 - 021007 3/ 69/ 0 1/ 75/ 0 148 7405 TIGO 020417 - 020929 10/ 33/ 3 2/ 31/ 0 79 7501 ML0616 020102 - 020925 139/188/ 18 124/187/ 17 673 7548 CAGLAS 020226 - 020415 0/ 0/ 0 0/ 10/ 0 10 7806 METLAS 020109 - 021003 0/ 40/ 5 0/ 38/ 1 84 7810 ZIMLAT 020101 - 020908 207/148/ 31 144/ 99/ 15 644 7811 POLLAS 020103 - 020727 0/ 34/ 1 0/ 29/ 0 64 7820 YSLR01 020105 - 020414 0/ 36/ 0 0/ 62/ 0 98 7824 SPNLAS 020109 - 021007 0/167/ 3 0/103/ 6 279 7832 SALRO 020102 - 021007 182/ 66/ 13 214/ 42/ 11 528 7835 GRASSE 020102 - 021003 20/ 84/ 5 30/ 72/ 2 213 7836 GFZLAS 020103 - 021001 5/ 87/ 12 2/ 59/ 6 171 7837 CHILAS 020102 - 021007 0/ 44/ 1 0/ 34/ 1 80 7838 SHOLAS 020112 - 021005 3/ 52/ 3 2/ 56/ 0 116 7839 AUSLAS 020102 - 021002 136/226/ 27 86/140/ 10 625 7840 RGOLAS 020102 - 021007 200/215/ 44 165/141/ 19 784 7845 GRASLL 020102 - 021001 11/ 27/ 4 12/ 15/ 3 72 7848 FTLR03 020202 - 020826 4/ 38/ 0 5/ 32/ 4 83 7849 MSLO01 020101 - 021006 183/113/ 16 152/118/ 15 597 7941 MLROnn 020108 - 020717 29/ 17/ 3 20/ 26/ 2 97 8834 WLRS01 020108 - 021007 95/126/ 21 107/ 83/ 11 443 -------------------------------------------------------------------------- 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. 2. This week´s batch of QL data included observations of a new SLR station in Lviv, Ukraine (1831, DOMES number 12368S001). Further information can be obtained from the station log sheet at the ILRS web pages. ”/DGFI3/home/slreport/mbox” complete From: Ron Noomen ******************************************************************************** |