Multilevel data simulation of the interferometric Synthetic Aperture Radar

Abstract:

In order to provide the data source for the research of Interferometric Synthetic Aperture Radar(InSAR) system，a novel InSAR simulator was studied，which consisted of the Raw Signal Level (RSL)，the Single-look-complex Image Level(SIL)，and the Interferometric Phase Level(IPL). This simulator could be applied to the Synthetic Aperture Radar(SAR)/InSAR data simulation of both spaceborne and airborne. A new model of complex backscattering coefficients for the InSAR data simulation was presented and validated. Furthermore the implementation details of the multilevel simulator were discussed. For the RSL，a new model with higher computation efficiency to generate the radar echo was proposed，benefitting from the symmetry of the signal generation，the multi-core technique of CPU and many-core technique of Graphic Processing Units(GPU). For the image level，an efficient approach to create single-look image pair was presented. For the IPL，a reasonable noise model related to geometric decorrelation was also proposed. Some meaningful results by the novel simulator verified the theoretical analysis.