Spotlight SAR data processing using the frequency scaling algorithm

被引：286

作者：

Mittermayer, J ^{[1
]}

Moreira, A

Loffeld, O

机构：

[1] Deutsch Zehtrum Luft & Raumfahrt, Inst Hochfrequenztech, DLR, D-82234 Oberpfaffenhofen, Germany

[2] Univ Siegen, Inst Nachrichtenverarbeitung, D-57068 Siegen, Germany

来源：

IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING | 1999年 / 37卷 / 05期

关键词：

D O I：

10.1109/36.789617

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 new processing algorithm for spotlight SAR data processing. The algorithm performs the range cell migration correction for non-chirped raw data without interpolation by using a novel frequency scaling operation. The azimuth processing is based on a spectral analysis approach which is made highly accurate by azimuth scaling. In almost all processing stages, a subaperture approach is introduced for efficient azimuth processing, In this paper, the complete derivation of the algorithm is presented. A very useful formulation for non-chirped SAR signals in range Doppler domain is also proposed where the residual video phase is ex-pressed by a chirp convolution. The algorithm performance is shown by several simulations. A spotlight image, which has been extracted from stripmap raw data of the experimental SAR system of DLR, shows the validity of the frequency scaling algorithm.

引用

页码：2198 / 2214

页数：17

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