Comparison of Orientation Angle Estimation Methodes over Coherent Scatterers

Inhalt:
In this paper, a study concerning the comparison of several different procedures for the estimation of scatterers orientation angle for the coherent backscattering case is performed. Routines were proposed for the estimation of the orientation angle of distributed as well as of deterministic (coherent) scatterers. On deterministic scatterers it is expected that all routines converge to the same value, and we verify this statement. The procedures that can be applied to the general case of non-symmetrical scatterers were found out to belong to two main classes that are fundamentally different. We indicate the cases for which the classes of routines diverge due to their fundamental difference. The Coherent Scatterers (CSs) technique is used to support the analysis and confirm the existence of general non-symmetric point-like scatterers in SAR images of urban environments. For that, experimental data using the DLR’s ESAR system at L-band over the city of Dresden, in Germany, is used.