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Information about 6 26

Published on October 17, 2007

Author: Abbott

Source: authorstream.com

EUREF’05: National Report of Switzerland:  EUREF’05: National Report of Switzerland D. Schneider U. Marti E. Brockmann A. Schlatter B. Vogel A. Wiget U. Wild Slide2:  SLR: Co-operation between AIUB and swisstopo, top 10 in the world- wide rating of ILRS, 2 wavelength satellite tracking Fundamental station Zimmerwald GNSS: Permanent GPS (Trimble 4700) and GLONASS (Ashtec Z18, Javad Legacy) tracking Gravity: Repeated FG5 measurements, permanent tidal gravimeter (ETHZ) Slide3:  Gravity Field and Geoid Concept for a new National Gravity Network LSN2004 with FG5 measure- ments on selected stations (0 order), re-observation of relative gravity (1st / 2nd order), new network adjustment Slide4:  Gravity Field and Geoid New National Geoid Model CHGeo2004 from gravity, vertical deflections, and GPS/levelling. Models used: Swiss DHM25 (level2), SRTM-3, global geopotential, 3D density model etc. There is a poster which covers this in detail [Schlatter et al., 2005]. Permanent GPS Network AGNES:  Permanent GPS Network AGNES Multi-purpose network (real-time positioning, national reference network, monitoring tectonic movements, collecting ZTD’s for atmosphere research) Optimization concept (sites on stable ground, extension towards border area to Germany, Austria and northern Italy, replacing Station JUJO for positioning service swipos-VRS) SAPOS APOS IREALP AGNES/swipos® ?? AGNES: distribution of station heights h [m] JUJO Real time positioning service „swipos“:  Real time positioning service „swipos“ New AGNES control center (placed in “demilitarized zone”, secure operation with redundant servers) DGPS service swipos-Nav now available free of charge over Internet or GSM (GPRS/NTRIP) replacing FM/RDS Precise positioning swipos-GIS/GEO over the Internet (GPRS/NTRIP) Integrity monitoring using a device for assessing VRS/RTK Analysis of permanent GPS networks:  Analysis of permanent GPS networks GPS Meteorology: European collaboration in research projects COST-716,TOUGH There is a paper which covers this in detail [Schaer et al., 2005]. National Reference Frames:  National Reference Frames Re-observation of the GPS reference network LV95 in 2004 ->CHTRF2004 (more than 288 stations, including 60 control points of the monitoring net- work “Neotektonik Nordschweiz”) There is a paper which covers this in detail [Brockmann et al., 2005]. National Reference Frames:  National Reference Frames New Swiss National Height Reference Frame “LHN95”: Final kinematic adjustment of levelling (and gravity) data (1903 – 2004) and release. Combination of GPS heights with orthometric heights will be possible on the cm level (Swiss Plateau) and >5 cm (Alps) by using "CHGeo2004". There is a poster which covers this in detail [Schlatter et al., 2005]. GPS-height residuals of the combined adjustment CH-CGN2004 (orthometric heights LHN95, Geoid CHGeo2004, GPS-Network CHTRF2004) Current projects:  Current projects Swiss-4D: Kinematic analysis of geodetic observations (repeated levelling, GPS permanent / epoch data) for the investigation of tectonic deformation. Courtesy of GGL ETH Zürich Strain rates in NE Switzerland

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