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1 Reports on Geodesy

1 2001

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Long-term monitoring of recent crustal movements in the Eastern Alps (GPS-project "Alpentraverse")

Schmitt G., Lemp D.

Reports on Geodesy

2001

z. 2/57

21-28

For monitoring recent crustal movements in the eastern AIps, a GPS-network of 43 benchmarks has been observed in 1991, 1992, 1994 and 1999. The traverse is reaching from Munchen (Germany) to Trieste (Italy) as a regional network with a mean point distance of about 20 km. The 1999 campaign has been measured with 23 Leica GPS-receivers (System 9500, System 300 and System 200) during one week from 30.8.99 until 5.9.99. Four points have been observed 7 hours all days as permanent stations, the other points have been observed at least two times during the campaign for 5 hours. The results of the campaigns 1994 and 1999 have been processed with the Bernese software 4.2 and the comparison with the final results of 1991/1992 shows significant deformations of about 4mm/year. During the processing 3 different types of baseline strategies have been compared. The availability of at least 6 satellites during all sessions, long observation times and short baselines enabled a detection of significant movements in a 2D-deformation analysis. The paper explains the strategies of building baselines, the estimation of final coordinates and the results of the deformation analysis. It gives furtheron an outlook on possible future activities concerning 3D-deformation-analysis.