Precise geolocation of persistent scatterers aided and validated by a lidar DSM

December 1, 2013 in

Conference Paper


Author
Ling Chang

Co-authors
Prabu Dheenathayalan, Ramon Hanssen

Theme(s)


Conference
ESA Living Planet Symposium
Year: December 2013
Location: Edinburgh, United Kingdom

Keywords
Geolocation, Lidar DSM

Link or Download
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Abstract

Persistent Scatterers (PS) interferometry results in the de- formation history of time-coherent scatterers. Although several applications focus on smooth, spatially correlated signals, we aim for the detection, identification and analysis of single anomalies. These targets can be indicative of, e.g., strain in structures, potentially leading to the failure of such structures. For the identification and analysis it is of the greatest importance to know the exact position of the effective scattering center, to avoid an improper interpretation of the driving mechanism. Here we present an approach to optimize the geolocation of important scatterers, when necessary aided by an a priori Lidar-derived DSM (AHN-1 data) with 15cm and 5m resolution in vertical and horizontal directions, respectively. The DSM is also used to validate the geocoding. We implement our approach on a near-collapse event of a shopping mall in Heerlen, the Netherlands, to generate the precise geolocation of local PS points.