Coupling of GPS/GNSS and radar interferometric data for a 3D surface displacement monitoring of landslides

摘要: Persistent scatterer interferometry (PSI) is capable of millimetric measurements ground deformation phenomena occurring at radar signal reflectors (persistent scatterers, PS) that are phase coherent over a period time. However, there also limitations to PSI; significant decorrelation can occur between subsequent interferometric (InSAR) acquisitions in vegetated and low-density PS areas. Here, artificial amplitude- phase-stable scatterers may have be introduced. I2GPS was Galileo project (02/2010–09/2011) aimed develop novel device consisting compact active transponder (CAT) with an integrated global positioning system (GPS) antenna ensure co-registration cross-reference. The advantages are: (1) all CATs such as small size, light weight, unobtrusiveness usability multiple satellites tracks; (2) absolute calibration for PSI data; (3) high sampling rate GPS enables detection abrupt motion 3D; (4) vertical components the local velocity field derived from single-track InSAR line-of-sight displacements. A trial set test approach potential landslide site Potoska planina, Slovenia evaluate applicability operational monitoring natural hazards. Preliminary results highlight some key considerations deployments field. Ground allowed assessment hazard demonstrated synergies applications. were compared assess consistency methods slope mass movement aspect.