Abstract
Persistent scatterer interferometry is one of the frequently employed remote sensing techniques and often used for surface and building deformation monitoring tasks. Even though movements of some millimetres per year can be sensed with this method, the assignment of individual scatterers to their corresponding parts of the building is often unknown. This can be problematic, e.g. in case of non-rigid movements of buildings. We present a method of assigning persistent scatterers (PS) to their counterparts in oblique optical images as one possibility of obtaining additional information about the physical nature of PS. In this way, we want to pave the way towards a better understanding of the reflexion mechanism leading to the PS. The approach is based on lattice patterns of PS as they can often be found at facades in urban areas. Even though only a subset of all facades exhibit such a regularity, we use these patterns to cope with the different sensing geometries. Two challenges are addressed in particular: First, the extraction of lattice patterns from a set of PS belonging to the same facade and second, the derivation of suitable matching candidates from optical oblique images. The applicability of the established assignment is shown by investigating the origin of some PS through a visual inspection of their counterparts in the optical image.
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