1. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) 1 EUREF 2013 Symposium National Report of Austria by G. Stangl, N. Höggerl, E. Imrek, D. Ruess, E. Zahn (BEV), H.-P.Ranner (IWF) Budapest, Hungary May 29 th to May 31 st, 2013

2. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Permanent Networks At present 5 : AMON, CERGOP, EPN, GREECE, MON 2 For reference and geokinematics Processed according to EPN guidelines Reprocessing started

3. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) APOS – Monitoringstation Innsbruck (INBK ) Relative humidity of ZAMG sensor at PATK (2249 m above adriatic sea level) Time series (16th to 23rd of April) of coordinate differences; height offset (red graph) at INBK (university) (615 m above adriatic sea level) Relative humidity of ZAMG sensor at INBK (university) (615 m above adriatic sea level) height offset vs. realitve humidity

4. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) 30.793 control points of 1st – 6th order 45.780 control points of 6th order determined by adjustment of observations (GPS - baseline, direction, distance, elevation) determined by APOS-RTK

5. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Multipath Mitigation DISAP 5 Testbed at roof with reflectors Multipath signals tested with Code-carrier and signl/noise ratio Pre-Test with various antennas and 2 receivers Main Test with new antenna (moving) in summer 2013

6. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) Gravity changes in Obergurgl / Tyrol due to ablation of surrounding glaciers published: P. Arneitz, B. Meurers, D. Ruess, Ch. Ullrich, J. Abermann, M. Kuhn, 2013: Gravity effect of glacial ablation in the Eastern Alps – observation and modeling. The Cryosphere, 7, 491–498, 2013 Oetztal Alps Ice thickness variation 1997 - 2006 m Absolute gravity time series at Obergurgl 1987 - 2009 and cumulative ice-mass balance observations

7. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) 2012 status of precise Levelling Loops between Austria (Tirol) and Italy (South Tyrol) and their datum Timmelsjoch 2474m Brennerpass 1370m

8. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) 2012 levelling (BEV)~90 km Lev-BBT (cooperation)~46 km absolute gravimetry PFAN OBGU GRAZ TRFB ARLT Beilage 1: Feldarbeit V11/2012 Übersicht EVRF Hutbigl Timmelsjoch Brenner

9. EUREF2012: National Report of Austria Federal Office of Metrology and Surveying (BEV) APOS - Austrian Positioning Service APOS - reference station network (currently 68 stations included) - status 2013-04