The levelling measurements over an Old Bridge (Bratislava, Slovakia) that was affected by the crash of an Austrian tug in 2010 were compared to the PSInSAR analysis with non-linear model assumption. The crash accelerated the deformation process observable since 2009 to such an extent that bridge has to be dismounted due to its emergency condition in 2014. Changes are observable in the time series from PSInSAR that are compared to the levelling data in Figure 3. The misalignment between signals starting from 2009 may correspond to the different type of deformation phenomena observed at the points stabilised in the bridge deck (levelling) and scattered from the steel truss of the bridge (PSInSAR).
Figure 3: Levelling vs. PSInSAR time series over bridge that was affected by the crash of a tug in 2010.
