Author: E. Brockmann ******************************************************************************* EUREF REPORT FOR GPS WEEK 0861 (DAYS 189-195, DATES 07-07-96 - 13-07-96) ******************************************************************************* Report of the combination of the European weekly GPS solutions International Association of Geodesy Commission X - Global and Regional Geodetic Networks Subcommission for Europe (EUREF) Contributing Solutions: ----------------------- Group Description Contribution BEK - International Commission for Global Geodesy of SINEX the Bavarian Academy of Sciences (BEK) COE - European solution created at the CODE SINEX (Center for Orbit Determination in Europe) Analysis Center of the IGS IFG - Institute for Applied Geodesy in Germany (IfAG) SINEX OLG - Observatory Lustbuehel Graz (OLG) ANEQ ROB - Royal Observatory of Belgium (ROB) ANEQ WUT - Warsaw University of Technology (WUT) ANEQ SINEX: Software independent exchange format Version 0.05 or 1.00 ANEQ : Bernese Software specific normal equation file Submitted by: Center for Orbit Determination in Europe (CODE) Astronomical Institute, University of Berne, Switzerland Contact : E. Brockmann (brockmann@aiub.unibe.ch) Products available through anonymous ftp using: A) ftp ubeclu.unibe.ch -or- ftp 130.92.6.11 after login: cd aiub$ftp; cd euref B) ftp igs.ifag.de -or- ftp 141.74.240.26 after login: cd pub/EUREF/CLUSTERS/wwww (GPS week wwww) C) ftp jupiter.oma.be -or- ftp 193.190.230.20 after login: cd pub/euref/product/combin Processing Strategy: -------------------- - The combined weekly EUREF solution (EUR) was created after removing the Analysis Center specific constraints. - Covariance rescaling factors are derived from the sampling rate used by each center. In fact all solutions contribute to the combined solution with the same weight. - We perform free network solutions, specifying 6 no-net translation and rotation constraints to define the geodetic datum of the combined solution. We use the ITRF93 coordinates (up to GPS week 0859) respectively the ITRF94 coordinates (since GPS week 0860) of the sites BRUS, KOSG, MADR, MATE, WETT, GRAZ and ZIMM to align the free solutions with the terrestrial reference frame. - The comparisons between each individual solution and the combined solution is done using a 7-parameter Helmert transformation. The Helmert parameters are determined using all sites of the individual solutions. - In the first Table unweighted rms values (for the coordinate components in the local system North-East-Up), derived from the Helmert residuals, are shown for each site. - In the second table an (unweighted) rms is computed for each Analysis Center. These values are derived from the Helmert residuals of all sites of a particular Analysis Center. AVAILABLE FILES: ----------------------------------------------------------------------------- EUR08617.SUM THIS TEXT FILE EUR08617.SNX COMBINED EUROPEAN SOLUTION FOR GPS WEEK 0861 ----------------------------------------------------------------------------- REMARKS: - Antanna change in MATE 12734M008 between day of GPS week 1 and 2. Estimated difference: about 4 cm (mainly in height). * 2 LNAACs (BEK, IFG) estimated one coordinate set valid for the entire week. These estimates were excluded from the combination. * the estimates of COE and WUT were used in the combination. - Since GPS week 0857 we discovered larger residuals for the LNAAC BEK. We rescaled the associted covariances by a factor of 3 to avoid that the combined solution is too much affected. COMBINATION GPSWEEK 0861, EUROPE ------------------------------------------------------------------------------- PROCESSED FILES : 6 TOTAL NUMBER OF STATIONS: 38 ------------------------------------------------------------------------------- RESIDUAL RMS IN MM STATION #FILES 123456 N E U ------------------------------------------------------------------------------- CAGL 12725M003 2 MM 0.4 3.4 11.4 NOTO 12717M003 2 MM 0.9 7.0 4.8 ZIMM 14001M004 4 NN NN 0.8 4.0 7.2 MASP 31303M002 2 MM 3.4 2.0 4.9 VILL 13406M001 2 MM 1.8 5.9 21.5 MADR 13407S012 3 NNN 1.1 4.0 0.5 MEDI 12711M003 3 MM M 0.7 3.1 20.6 SFER 13402M004 2 MM 0.3 10.8 21.5 UPAD 12750M002 2 M M 1.2 7.5 24.4 BOR1 12205M002 3 M M M 0.1 0.6 3.2 KOSG 13504M003 4 NN NN 0.8 0.7 5.6 BRUS 13101M004 3 NN N 0.5 0.8 2.7 BOGO 1 M - - - METS 10503S011 3 MM M 1.6 0.8 3.2 MATE 12734M008 2 M M 1.3 1.3 13.9 GOPE 11502M002 3 M M M 0.6 0.7 3.3 GRAZ 11001M002 3 NNN 0.3 1.3 3.5 HERS 13212M007 3 MM M 0.7 0.7 3.9 JOZE 12204M001 3 M M M 1.0 0.4 7.0 KIRU 10403M002 1 M - - - TROM 10302M003 1 N - - - ONSA 10402M004 3 MM M 0.7 1.4 3.6 POTS 14106M003 4 MMMM 0.3 0.3 7.2 REYK 10202M001 2 MM 1.3 1.8 3.2 WTZR 14201M010 3 N NN 0.4 0.1 0.8 WETT 14201M009 3 MM M 0.5 0.3 4.0 LAMA 12209M001 3 M M M 0.3 1.1 7.9 ZWEN 12330M001 2 MM 1.7 2.6 7.0 MDVO 12309M002 2 M M 1.0 0.9 3.4 NYAL 10317M001 1 M - - - PENC 11206M006 3 M M M 0.5 0.1 4.3 THU1 43001M001 1 M - - - KELY 43005M001 1 M - - - MATE 12734M008B 2 M M 2.2 0.9 15.4 DENT 13112M001 1 M - - - DOUR 13113M001 1 M - - - DELF 13502M004 1 M - - - WARE 13114M001 1 M - - - ------------------------------------------------------------------------------- FLAGS: M: MEAN, F: FIXED, N: FREE NETWORK RESTRICTIONS 1 ------------------------------------------------------------------------------- UNWEIGHTED RMS VALUES WITH RESPECT TO THE COMBINED SOLUTION IN MM ------------------------------------------------------------------------------- PROCESSED FILES : 6 TOTAL NUMBER OF STATIONS: 38 ------------------------------------------------------------------------------- FILE GRP #SITES COV.COMP. COMPONENT RMS --------------------------------------------------- N 1.6 1 BEK 9 0.1110 E 6.8 U 18.1 --------------------------------------------------- N 0.7 2 COE 33 1.0000 E 0.6 U 4.6 --------------------------------------------------- N 0.7 3 IFG 11 1.0000 E 1.3 U 4.4 --------------------------------------------------- N 0.2 4 OLG 11 0.1600 E 0.2 U 1.8 --------------------------------------------------- N 0.3 5 ROB 10 0.6600 E 0.2 U 0.8 --------------------------------------------------- N 0.9 6 WUT 12 0.1600 E 0.9 U 6.1 --------------------------------------------------- N 0.8 MEAN 38 E 2.2 U 6.8