Bundesamt für LandestopographieOffice fédéral de topographieUfficio federale di topografiaUffizi federal da topografia

EUREF’03: National Report of Switzerland

4 - 7 JUNE 03

EUREF'03 Toledo

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

4 - 7 JUNE 03

EUREF'03 Toledo

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

4 - 7 JUNE 03

EUREF'03 Toledo

Analysis of permanent GPS networks

• Networks:– EUREF-Subnet– AGNES + EUREF-Subnet– Processing interval: daily / hourly

• GPS-Meteorology: European Collaboration within COST-716 and TOUGH

4 - 7 JUNE 03

EUREF'03 Toledo

Transformation old/new reference frames

• Position: LV03LV95- 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

1 m 2 m 3 m

0 k m 2 0 k m 4 0 k m 6 0 k m 8 0 k m 1 0 0 k m

-0 .20 m

-0.15 m

-0.10 m

-0.05 m

-0.00 m

0.05 m

0.10 m

0.15 m

0.20 m

0.25 m

0.30 m

0.35 m

0.40 m

0.45 m

0.50 m

0.55 m

0.60 m

0.65 m

4 - 7 JUNE 03

EUREF'03 Toledo

Maintenance control points

Tasks # Dist. Establishment Maintenance

Km when what where when

Zimmerwald 1 250 -- operation/measurement CH perm./yearly

EUREF stations 3 150 if required inspection CH every 5 years

AGNES stations 29 50 if required operation/inspection CH perm./every 5 years

LV95 stations 206 15 if required inspection CH every 5 years

First order points(LV03)

3000 5 no new sites inspection Centr.Plateau every 15 years

Inspection Prealps./Jura every 25 years

inspection Alps if required

First order lev. points(LHN95)

9000 3 if required inspection CH every 15 years

Test nets 2 0-5 if required inspection CH every 5 years

4 - 7 JUNE 03

EUREF'03 Toledo

Current projects

• Control point data service• GIS for the national border• LHN95• Swiss 4D