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2018 | OriginalPaper | Chapter

2. GEO SAR System Analysis and Design

Authors : Teng Long, Cheng Hu, Zegang Ding, Xichao Dong, Weiming Tian, Tao Zeng

Published in: Geosynchronous SAR: System and Signal Processing

Publisher: Springer Singapore

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Abstract

GEO SAR is a new type of space-borne SAR, which runs on the geosynchronous orbit and has the advantages of short revisit time and wide coverage. However, due to the high geosynchronous orbit, the system characteristics and design methods of GEO SAR are quite different from those of the traditional low-earth-orbit SAR (LEO SAR), which are introduced in this chapter. Firstly, the system characteristics of GEO SAR are analyzed. The differences between GEO SAR and LEO SAR are introduced briefly, and then the coverage and revisit abilities are compared with the traditional LEO SAR. After that, a curvature circle motion model (CMM) is introduced to describe the curved satellite track, the Doppler characteristics are analyzed and the work modes are compared. Secondly, the parameter design methods of resolution, power and ambiguity are presented for GEO SAR, considering the high squint observation. Thirdly, two attitude steering strategies are introduced for GEO SAR. The total zero Doppler steering (TZDS) method aims to compensate the serious effects of Earth rotation and obtain a zero Doppler centroid, and the optimized resolution steering (ORS) method attempts to reduce the required steering angle and obtain an optimal resolution feature.

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previous chapter Introduction
next chapter Algorithms for GEO SAR Imaging Processing
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Metadata
Title
GEO SAR System Analysis and Design
Authors
Teng Long
Cheng Hu
Zegang Ding
Xichao Dong
Weiming Tian
Tao Zeng
Copyright Year
2018
Publisher
Springer Singapore
Book
Geosynchronous SAR: System and Signal Processing

Print ISBN: 978-981-10-7253-6

Electronic ISBN: 978-981-10-7254-3

Copyright Year: 2018

DOI
https://doi.org/10.1007/978-981-10-7254-3_2