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Overview of Switzerland's SLR and GNSS Observations at Zimmerwald Station

The National Report of Switzerland highlights the Zimmerwald Fundamental Station's progress in Satellite Laser Ranging (SLR) observations since 1997. Ranked 5th among approximately 40 stations for Lageos normal points in 2002, it achieved the top position during the week of March 16-22, 2003. The station utilizes advanced GNSS techniques, with contributions from both GPS and GPS/GLONASS receivers to the IGS and IGLOS systems. Additionally, the report discusses the EUREF activities, including the refinement of permanent GPS networks, processing intervals, and transformation of reference frames.

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Overview of Switzerland's SLR and GNSS Observations at Zimmerwald Station

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  1. EUREF’03: National Report of Switzerland

  2. Fundamental station Zimmerwald • SLR observations • Continuously more observations with the new telescope since 1997 • ranked # 5 out of about 40 stations regarding the number of Lageos normal points in 2002 • # 1 in week March 16 to 22, 2003 • GNSS oservations • 1 GPS, 2 GPS/GLONASS receivers contribute to IGS and IGLOS EUREF'03 Toledo

  3. Permanent GPS networks (AGNES) • Last refinements of installations (29 sites) • Availability 99.1% (2002) • VRS software (with post-processing) • Connection D-A-CH • Developments of EUREF-IP EUREF'03 Toledo

  4. Analysis of permanent GPS networks • Networks: • EUREF-Subnet • AGNES + EUREF-Subnet • Processing interval: daily / hourly • GPS-Meteorology: European Collaboration within COST-716 and TOUGH EUREF'03 Toledo

  5. Transformation old/new reference frames • Position: LV03LV95- finite element transformation- software: FINELTRA (correct)- regular Grid 1km (approximate) • Height: LN02 LHN95- new: orthometric heights- part of horizontal position: diff. LN02 and normal heights- part of elevation: Bouguer anomalies- software: HTRANS EUREF'03 Toledo

  6. Maintenance control points EUREF'03 Toledo

  7. Current projects • Control point data service • GIS for the national border • LHN95 • Swiss 4D EUREF'03 Toledo

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