Investigation on Ionospheric Decorrelation of Space-Borne Pol-in-SAR Systems

XIA Dong-kun; LI Yang; QI Yao-long; HONG Wen; WU Yi-rong

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Investigation on Ionospheric Decorrelation of Space-Borne Pol-in-SAR Systems

更新时间：2025-07-16

- Investigation on Ionospheric Decorrelation of Space-Borne Pol-in-SAR Systems
- Acta Electronica Sinica Vol. 39, Issue 6, Pages: 1309-1314(2011)
- 作者机构：
  
  1. 中国科学技术大学电子工程与信息科学系,安徽,合肥,230027
  2. 中国科学院电子学研究所,北京,100190
  3. 微波成像技术国家级重点实验室,北京,100190
  4. 中国科学技术大学电子工程与信息科学系安徽合肥,230027
  5. 中国科学院电子学研究所北京,100190
  6. 微波成像技术国家级重点实验室北京,100190
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN957.52
- Published：2011
- 稿件说明：
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XIA Dong-kun, LI Yang, QI Yao-long, et al. Investigation on Ionospheric Decorrelation of Space-Borne Pol-in-SAR Systems[J]. Acta Electronica Sinica, 2011, 39(6): 1309-1314.
DOI：

XIA Dong-kun, LI Yang, QI Yao-long, et al. Investigation on Ionospheric Decorrelation of Space-Borne Pol-in-SAR Systems[J]. Acta Electronica Sinica, 2011, 39(6): 1309-1314. DOI：

摘要

中低频段(UHF/VHF、P、L)星载极化干涉SAR系统运行于电离层之上

会受到相位扰动、法拉第旋转等电离层效应的影响

从而降低系统的成像质量以及参数反演的准确度.本文从电离层造成的成像散焦和极化平面旋转角度出发

重点分析和推导了电离层不规则体去相干以及法拉第旋转效应对相干最优的影响

并通过仿真实验模拟了典型系统条件以及电离层状态下的干涉去相干现象.实验结果表明

电离层不仅会降低数据的相干性而且会减少最优相干估计过程中的极化组合数量

从而对极化干涉应用造成不可忽略的影响.

Abstract

The space-borne polarimetric interferometric synthetic aperture radar (POLinSAR) working at UHF/VHF

P and L bands are sensitive to the ionospheric effects such as phase perturbation

Faraday rotation

etc.which will cause POLinSAR system performance deterioration in imaging and geophysical parameter inversion.This paper analyzed the image defocusing and polarization rotation decorrelation induced by ionospheric irregularities and Faraday rotation.In addition

simulations with typical system parameters and ionosphere conditions were analyzed.The results show that the ionospheric effects can both introduce decorrelations and limit the polarimetric vector space of POLinSAR systems on coherence optimization which affect POLinSAR applications significantly.

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