1. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) 1 EUREF 2012 Symposium National Report of Austria by Günter Stangl, Norbert Höggerl, Jürgen Otter, Diethard Ruess, Ernst Zahn (BEV) Sandro Krauss, H.-P.Ranner (IWF) Saint Mandé, France June 6 th to June 8 th, 2012

2. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Permanent GNSS-Networks Cooperation between BEV and OLG Observatory Lustbühel/Graz AMON08 solution: Base for the whole national realization of ETRS89 in AUSTRIA 5 Networks: EPN – Subnetwork (80 stations) MON - Eastern Medit./Arabian Plate (65 stations) CERGOP – Central European Geodynamic Network (80 stations) AMON - Austrian Monitoring (85 stations) GREC – Greek testbed for ionosphere, earthquakes and geokinematics (60 stations) Check for Lifetime: AMON horizontal velocities ETRF2000 from cumulated time series 1999-2012

3. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Transformation Grid between H orth and H GEBR (Height-Grid) = (H NORM – H GEBR ) + (H ORTH – H NORM ) H ORTH – H GEBR Grid 1 Grid 2 ETRS89 H ORTH = H ELL – N GRS80 Correction value Height in Use (MGI) H GEBR Used for laser scanning data Advantages: homogeneous for the entire area (Austria)

4. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Grid 1: Modelling of Differences H NORM - H GEBR different tide gauges: about -30cm use of levelling results no correlation with elevation Grid 2: Modelling of Differences H ORTH – H NORM ~ 53.000 g-values (surface) use of interpolated g-Values (Bouguer-map): 50.800 control points 47.200 levelling points 358.000 grid points of DTM (500m) correlation with elevation

5. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Resulting Height Grid = Grid 1 + Grid 2 GRID , (MGI) Grid width 15“x22.5“ (≈ 500 x 500 m) Precision of transformation < 5 cm

6. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Gravity European Comparison of AG in Walferdange ECAG 2011: Austria participated with FG5-242 in the Key Comparison EURAMET.M.G-K1 AG-Meeting in Vienna, BEV, February 2012: JWG 2.1-Techniques and Metrology in AG and JWG 2.2-Absolute Gravimetry and Absolute Gravity Reference System Build-up of a gravity base network in Italy/ Autonomous Province Bozen: 6 stations Walferdange/Luxemburg Gravity Base network Province Bozen/Italy