Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing

Lei-lei KOU; Xiao-qing WANG; Mao-sheng XIANG; Jin-song CHONG; Min-hui ZHU

doi:10.1631/jzus.C1000170

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Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing

光学工程 | Updated：2022-08-31

- Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing
- Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing
- 信息与电子工程前沿（英文） 2011年12卷第5期页码：404-416
- Affiliations：
  
  1.National Key Laboratory of Microwave Imaging Technology, Institute of Electronics, Beijing 100190, China
  2.Graduate University of Chinese Academy of Sciences, Beijing 100190, China
- Author bio：
  
  E-mail:cassie320@163.com
- Funds：
- DOI：10.1631/jzus.C1000170
  中图分类号：
- 收稿：2010-05-26，
  
  修回：2011-02-28，
  
  录用：2010-11-11，
  
  纸质出版：2011-05
- Accepted：
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Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing[J]. 信息与电子工程前沿（英文）, 2011,12(5):404-416.

Lei-lei KOU, Xiao-qing WANG, Mao-sheng XIANG, et al. Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing[J]. Frontiers of Information Technology & Electronic Engineering, 2011, 12(5): 404-416.
Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing[J]. 信息与电子工程前沿（英文）, 2011,12(5):404-416. DOI： 10.1631/jzus.C1000170.

Lei-lei KOU, Xiao-qing WANG, Mao-sheng XIANG, et al. Effect of orbital errors on the geosynchronous circular synthetic aperture radar imaging and interferometric processing[J]. Frontiers of Information Technology & Electronic Engineering, 2011, 12(5): 404-416. DOI： 10.1631/jzus.C1000170.

摘要

Abstract

The geosynchronous circular synthetic aperture radar (GEOCSAR) is an innovative SAR system

which can produce high resolution three-dimensional (3D) images and has the potential to provide 3D deformation measurement. With an orbit altitude of approximately 36 000 km

the orbit motion and orbit disturbance effects of GEOCSAR behave differently from those of the conventional spaceborne SAR. In this paper

we analyze the effects of orbit errors on GEOCSAR imaging and interferometric processing. First

we present the GEOCSAR imaging geometry and the orbit errors model based on perturbation analysis. Then

we give the GEOCSAR signal formulation based on imaging geometry

and analyze the effect of the orbit error on the output focused signal. By interferometric processing on the 3D reconstructed images

the relationship between satellite orbit errors and the interferometric phase is deduced. Simulations demonstrate the effects of orbit errors on the GEOCSAR images

interferograms

and the deformations. The conclusions are that the required relative accuracy of orbit estimation should be at centimeter level for GEOCSAR imaging at L-band

and that millimeter-scale accuracy is needed for GEOCSAR interferometric processing.

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