Focusing of general bistatic SAR configuration data with 2-D inverse scaled FFT

被引：118

作者：

Natroshvili, Koba ^{[1
]}

Loffeld, Otmar ^{[1
]}

Nies, Holger ^{[1
]}

Ortiz, Amaya Medrano ^{[1
]}

Knedlik, Stefan ^{[1
]}

机构：

[1] Univ Siegen, Ctr Sensorsyst, D-57068 Siegen, Germany

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 2006年 / 44卷 / 10期

关键词：

bistatic synthetic aperture radar; focusing; Loffeld's bistatic formula (LBF); method of stationary phase; Rocca's smile; synthetic aperture radar (SAR); target-point (TP) reference spectrum; two-dimensional (2-D) inverse-scaled fast Fourier transform (ISFFT);

D O I：

10.1109/TGRS.2006.872725

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

This paper presents a bistatic focusing solution for the general case, when transmitter and receiver trajectories move along nonparallel trajectories with different velocities. The approach in this paper is based on the point target reference spectrum for an arbitrary bistatic configuration, derived from our previous publications. Based on various simulations, the validity of the formula for both airborne and spaceborne configurations is demonstrated. Focusing for special bistatic azimuth time-invariant configurations, "tandem" and "translationally invariant" constellations are accomplished. All focusing algorithms have been developed in an interactive data language and verified with adequate simulation results. The bistatic algorithm was further successfully applied to real bistatic data acquired by the German Research Establishment for Applied Natural Sciences' PAMIR and AER-II synthetic aperture radar systems. Processing in the general case turns out to be additionally truly azimuth time variant. It is solved by implementing a novel two-dimensional inverse-scaled fast Fourier transform algorithm.

引用

页码：2718 / 2727

页数：10

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