Findings of Persistent Scatterer Interferometry (Psi) for Vilnius Area, Lithuania

A study using Persistent Scatterer Interferometry (PSI) reveals that the Vilnius Historic Centre, Lithuania, exhibits remarkable ground stability, with annual surface movement velocities ranging from –1.5 to +1.5 mm/year over an 8.5-year observation period. This stability suggests minimal deformation in the city centre, despite challenges in interpreting PSI data due to complex local geology and anthropogenic factors. However, localized areas of downward movement were identified through satellite-based radar observations (SAR), indicating potential subsidence risks. Field reconnaissance confirmed these findings, highlighting the importance of distinguishing between natural ground movements—such as landslides and karst processes—and structural deterioration in urban settings. The research underscores the utility of PSI in monitoring ground conditions for UNESCO World Heritage Sites, supporting efforts to protect cultural heritage from geotechnical hazards.

Čyžienė, J., Graniczny, M., Kowalski, Z., Piotrowski, A., Satkūnas, J., & Wasowski, J. (2010). FINDINGS OF PERSISTENT SCATTERER INTERFEROMETRY (PSI) FOR VILNIUS AREA, LITHUANIA. Journal of Environmental Engineering and Landscape Management, 18(4), 259–270. https://doi.org/10.3846/jeelm.2010.30