Correlation of Distributed Small Satellites SAR Echoes

XU Hua-ping; ZHOU Yin-qing; LI Chun-sheng

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Correlation of Distributed Small Satellites SAR Echoes

更新时间：2025-07-16

- Correlation of Distributed Small Satellites SAR Echoes
- Acta Electronica Sinica Vol. 33, Issue 6, Pages: 965-969(2005)
- 作者机构：
  
  北京航空航天大学电子信息工程学院,北京,100083
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN959
- Published：2005
- 稿件说明：
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XU Hua-ping, ZHOU Yin-qing, LI Chun-sheng. Correlation of Distributed Small Satellites SAR Echoes[J]. Acta Electronica Sinica, 2005, 33(6): 965-969.
DOI：

XU Hua-ping, ZHOU Yin-qing, LI Chun-sheng. Correlation of Distributed Small Satellites SAR Echoes[J]. Acta Electronica Sinica, 2005, 33(6): 965-969. DOI：

摘要

本文通过建立单视复图像信号模型

提出并推导了分布式小卫星合成孔径雷达(SAR)回波信号之间新的相关系数模型.根据干涉复图像对的相位差与相关系数之间的关系

定义了方位向相位新概念

提出了分布式小卫星SAR干涉复图像对的相位差的均值包括干涉相位和方位向相位两部分

为了防止方位向相位引起较大的干涉相位估计误差

必须在数据处理中引入去方位向相位处理新方法

并给出了去方位向相位处理的具体实现方法.最后

进行了计算机仿真处理

仿真结果验证了本文分析的正确.

Abstract

There are both across-track and along-track baseline in Distributed Small Satellites Synthetic Aperture Radar(DSS-SAR)

which complicates the correlation of DSS-SAR echoes.After modeling the single-look complex SAR image in DSS-SAR

the new correlation model for DSS-SAR echoes was proposed and derived.According to the relationship between correlation and phase difference of the DSS-SAR image pair

it is proposed that the phase difference of DSS-SAR complex image pair in DSS-SAR includes two parts:one is interferometric phase which is related to terrain elevation

another is azimuth phase which is brought from the along-track baseline and will decrease the terrain height accuracy dramatically.Then a new step

that is applied to remove the azimuth phase

must be added to the interferometric SAR data processing in DSS-SAR and the implementation of the azimuth phase removing step is presented.In the end

computer simulation is given and the results validate the correction of analysis in this paper.

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