Downward-Looking three dimensional(3D) Linear array SAR(LASAR) has the ability to map a directly overflown scene into a high resolution 3D image by looking perpendicularly *** scope of this paper is to present a Chirp...
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Downward-Looking three dimensional(3D) Linear array SAR(LASAR) has the ability to map a directly overflown scene into a high resolution 3D image by looking perpendicularly *** scope of this paper is to present a Chirp Scaling(cs) algorithm [1] of 3D ***,the principle of the LASAR system is ***,using the echo model the cs algorithm which focused the 3D SAR imaging in the range direction and the along track direction *** the beamforming technique is used to focus the 3D SAR data in cross-track *** the numerical experiments validate the feasibility of this algorithm.
With the resolution of SAR developing continually, it is found that in the process of image processing, using equivalent squint range model would bring large phase error. So using traditional cs algorithm for processi...
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ISBN:
(纸本)9781479911127
With the resolution of SAR developing continually, it is found that in the process of image processing, using equivalent squint range model would bring large phase error. So using traditional cs algorithm for processing will encounter difficulties. In order to solve this problem because of unsuitable slant range model, this paper introduces the fourth-order slant range model to replace the original model, and conducts a study on cs algorithm based on the fourth-order slant range model. This paper introduces the theoretical formulation and simulation results of the new algorithm. This algorithm can perform well for both low-resolution space-borne SAR and high-resolution space-borne SAR.
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