------------------------------------------------------------------------------- EUREF LOCAL ANALYSIS CENTRE ------------------------------------------------------------------------------- Agency acronym : COE Institution : Center for Orbit Determination in Europe (CODE) Mail Address : Astronomical Institute University of Berne Sidlerstrasse 5 CH-3012 Berne Switzerland E-Mail : code(at)aiub.unibe.ch Primary Contact Contact Name : Stefan Schaer Telephone : +41-31-631-8599 (8591) Fax : +41-31-631-3869 E-Mail : stefan.schaer(at)aiub.unibe.ch Secondary Contact Contact Name : Rolf Dach Telephone : +41-31-631-8593 (8591) Fax : +41-31-631-3869 E-Mail : rolf.dach(at)aiub.unibe.ch Third Contact Contact Name : Telephone : Fax : E-Mail : Software Used : Bernese GNSS Software Version 5.3, developed at AIUB Stat. Included in Analysis : 4CHAR start- stop ssss (EUR) wwww - now ssss (IGS) wwww - wwww ssss (IGS) wwww - now ssss (EUR) wwww - now AJAC (EUR) 1048 - now ALME (EUR) 1098 - now ANKR (IGS) 0848 - now BOGO (EUR) 0860 - now BOR1 (IGS) 0848 - now BRUS (IGS) 0848 - 0924 CAGL (EUR) 0848 - now CASC (EUR) 0982 - now DELF (EUR) 0924 - now DOUR (EUR) 0924 - now EBRE (IGS) 0849 - now GLSV (IGS) 0955 - now GOPE (IGS) 0848 - 0924 GRAS (IGS) 0848 - 0924 GRAZ (IGS) 0848 - 0923* HELG (EUR) 1036 - now HERS (IGS) 0848 - 0923 HFLK (IGS) 0848 - 0992 HOFN (IGS) 0931 - now IAVH (IGS) 0989 - 0990 JOEN (EUR) 0924 - now JOZE (IGS) 0848 - 0924 KELY (IGS) 0848 - now KIR0 (EUR) 0925 - now KIRU (IGS) 0848 - now KOSG (IGS) 0848 - 0915* LAMA (IGS) 0849 - now MADR (IGS) 0848 - 0915 MAR6 (EUR) 0925 - now MAS1 (IGS) 0848 - now MATE (IGS) 0848 - 0923* MDVO (IGS) 0848 - now MEDI (IGS) 0848 - 0924 METS (IGS) 0848 - 0924 NICO (IGS) 0915 - 0915 NOTO (IGS) 0848 - 1078 NOT1 (IGS) 1081 - now NPLD (IGS) 1102 - now NSSP (IGS) 0986 - now NYA1 (IGS) 0848 - now ONSA (IGS) 0848 - 0923* OSLO (EUR) 0925 - 1021 PDEL (EUR) 1101 - now PENC (IGS) 0848 - now POTS (IGS) 0848 - 0923* PTBB (EUR) 1057 - now RABT (IGS) * RAMO (IGS) 0982 - now REYK (IGS) 0848 - now SFER (IGS) 0849 - 0932 SJDV (EUR) 0969 - 0986 SODA (EUR) 0924 - now STAV (EUR) 0925 - 1021 TERS (EUR) 1015 - now THU1 (EUR) 0848 - now TOUL (IGS) 0915 - 0986 TRO1 (IGS) 0848 - now TRON (EUR) 0925 - 1021 UPAD (IGS) 0863 - 0924 VAAS (EUR) 0924 - now VARD (EUR) 0925 - 1021 VIL0 (EUR) 0925 - now VILL (IGS) 0848 - now WETT (EUR) 0848 - 0882 WTZR (IGS) 0848 - 0923* ZECK (IGS) 0927 - now ZIMJ (IGEX) * ZIMM (IGS) 0848 - now ZWEN (IGS) 0848 - 1057/1141 - now Note that stations indicated with * are considered in our EUREF data analysis, but not included in our SINEX result files. EUREF solutions generated : COEwwww7.SNX Solution for 1 week for GPS week 'wwww' in SINEX format for GPS week 'wwww' COEwwww7.SUM Processing summary file for 1 week COEwwwwn.TRO Daily troposphere SINEX (based on weekly COEwwww7.SNX) COEwwwwn.SNX Daily SINEX results EUREF solutions sent to : BKG Report generated : 09-May-2000 Report updated : 09-Oct-2000 15-Oct-2001 03-Jan-2002 02-Jun-2014 ----------------------------------------------------------------------------- MEASUREMENT MODELS ----------------------------------------------------------------------------- Preprocessing : Carrier phase preprocessing is accomplished in a baseline- by-baseline mode using triple differences. Looking simultaneously at different linear combinations of L1 and L2, cycle slips are fixed in most cases. If a cycle slip cannot be fixed reliably, bad data points are removed or new ambiguity parameters are set up. In addition, a data screening step on the basis of weighted postfit residuals is performed. Outliers are removed for the final processing. Basic observable : GNSS carrier phase. GPS code measurements are used for receiver clock synchronization. The elevation mask angle is 3 degrees. An elevation-dependent weighting scheme is used (COSZ). The data sampling rate is 30 and 180 seconds, respectively. Modelled : Ionosphere-free linear combination of double-difference observable carrier phase. Ground antenna : IGS08/EPNC model (updates). phase center calibrations Satellite antenna: IGS08 model (updates). phase center calibrations Troposphere : ECMWF-based hydrostatic delay mapped with hydrostatic VMF1. Coefficients from 6-hourly global grids. Wet VMF1 used for estimation. Gradient model according to Chen-Herring (CHENHER). Ionosphere : First-order ionosphere delays eliminated by forming the ionosphere-free linear combination of L1 and L2. Higher-order ionosphere (HOI) corrections are applied. Regional ionosphere maps are generated in order to increase the number of resolved ambiguities in the QIF, the L5/L3 and the L1/L2 ambiguity resolution. ----------------------------------------------------------------------------- ESTIMATED PARAMETERS (APRIORI VALUES & SIGMAS) ----------------------------------------------------------------------------- Adjustment : Weighted least-squares adjustment. Mathematical correlation within the entire subnetwork are correctly modeled. The elevation-dependent observation weighting model adopted assumes a zero-difference observation sigma being proportional to 1/cos(z), where z denotes the satellite zenith distance angle. Rejection Criter.: Daily RINEX observation files containing less than 50 percent of possible observation epochs are ignored. The threshold value concerning data screening is 2.5 mm, specifically for a normalized, or L1 zero-difference zenith residual. Baseline data exceeding the overall sigma level of 5 millimeters is excluded as whole. Station : Minimum constraint solution aligned to current ITRF using coordinates an automatic fiducial station selection scheme. NEQ SINEX results are generated (containing minimum constained solution). Troposphere : Zenith path delay parameters are solved for at 1-hour intervals for each station. At the end of each week, the 7 daily sets of troposphere estimates are re-computed on the normal equation level by substituting the 7-day combined station coordinate results. Ionospheric : Regional TEC maps are derived from the geometry-free linear combination of double differences. The ambiguity-free maps are used to improve the QIF ambiguity resolution. The ambiguity-fixed TEC maps are made available in IONEX format. Ambiguity : Ambiguities are resolved in a baseline-by-baseline mode performing the following steps: . Melbourne-Wuebbena approach (<6000 km) . Quasi-Ionosphere-Free (QIF) approach (<2000 km) (also for GLONASS, same frequencies) . Phase-based widelane/narrowlane method (<200 km) (also for GLONASS, no restrictions) . Direct L1/L2 method, also for GLONASS (<20 km) (also for GLONASS, no restrictions) GLONASS is considered for ambiguity resolution (<2000 km). Regional ionosphere map information is used to support the code-less methods. Satellite clock : Satellite clock corrections are not estimated but bias eliminated by forming double differences. Receiver clock : Receiver clock corrections are estimated as part of the bias preprocessing using code measurements. They are finally eliminated by forming double differences. Orbits and ERPs : CODE final GNSS orbit and ERP information is adopted. Tidal : Solid earth tidal displacements are modeled according to displacements IERS 2010 conventions. Ocean loading corrections are computed based on Scherneck's amplitudes and phases. No atmospheric loading corrections are taken into account. -------------------------------------------------------------------------------