Monitoring Strategy of Geological Hazards Using Integrated Three-dimensional InSAR and GNSS Technologies with Case Study

Geodetic/geodynamic benchmarks, equipped with both ascending and descending radar corner reflectors, a method for integrated InSAR GNSS/GPS network observation were developed applied as the continuation of former geodetic monitoring at Dunaszekcső landslide, Hungary. The attempts to apply technologies using archive Sentinel-1 data practically failed on most intensive landside areas (“Vár” “Szent János” hills), where proper persistent or distributed scatterers not found. Our concept solved this problem, Simple Look Complex (SLC) images are used interpolate movements between two GNSS observations benchmarks Kalman-filtering. Since line-of-sight (LOS) changes barely sensitive north movements, information is essentially provided by measurement alone, moreover, measurements to: a) identify b) detect unwrapping errors missing cycles c) provide boundary values Kalman-filtering.After installation three GPS carried out 69 61 A B processed. processing properly indicated general movement history, which fit curves observations, well. dense points East Up (vertical) components made possible more detailed geomorphologic interpretations ongoing process observations. During investigated periods deceleration was experienced, however, dormant state needs monitoring.