Based on the general geometric model of multi-baseline Synthetic Aperture Radar Tomography(TomoSAR),the three-dimensional(3-D)sampling criteria,the analytic expression of the 3-D Point Spread Function(PSF)and the 3-D ...Based on the general geometric model of multi-baseline Synthetic Aperture Radar Tomography(TomoSAR),the three-dimensional(3-D)sampling criteria,the analytic expression of the 3-D Point Spread Function(PSF)and the 3-D resolution are derived in the 3-D wavenumber domain in this paper.Considering the relationship between the observation geometry and the size of illuminated scenario,a 3-D Range Migration Algorithm with Elevation Digital Spotlighting(RMA-EDS)is proposed.With this algorithm 3-D images of the area of interest can be directly and accurately reconstructed in the 3-D space avoiding the complex operations of 3-D geometric correction.Finally,theoretical analyses and simulation results are presented to demonstrate the shift-varying property of the 3-D PSF and the spatialvarying property of the 3-D resolution and to demonstrate the validity of the 3-D RMA-EDS.展开更多
基金Supported by the National Science Fund for Distinguished Young Scholars(Grant No.60725103)the National Natural Science Foundation ofChina(Grant No.60602015)+1 种基金the National Key Laboratory Foundation(Grant No.9140C1903030603)the Knowledge Innovation Programof Chinese Academy of Sciences(Grant No.07QNCX-1154)
文摘Based on the general geometric model of multi-baseline Synthetic Aperture Radar Tomography(TomoSAR),the three-dimensional(3-D)sampling criteria,the analytic expression of the 3-D Point Spread Function(PSF)and the 3-D resolution are derived in the 3-D wavenumber domain in this paper.Considering the relationship between the observation geometry and the size of illuminated scenario,a 3-D Range Migration Algorithm with Elevation Digital Spotlighting(RMA-EDS)is proposed.With this algorithm 3-D images of the area of interest can be directly and accurately reconstructed in the 3-D space avoiding the complex operations of 3-D geometric correction.Finally,theoretical analyses and simulation results are presented to demonstrate the shift-varying property of the 3-D PSF and the spatialvarying property of the 3-D resolution and to demonstrate the validity of the 3-D RMA-EDS.
