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Model-based target decomposition with the π/4 mode compact polarimetry data

π/4模式简缩极化基于模型的目标分解

Abstract

In this paper, model-based (surface, dihedral and volume scattering) target decomposition technique is proposed to decompose the π/4 mode compact polarimetric radar data. A general relationship between fully polarimetric coherence matrix and the Stokes vector of the π/4 mode compact polarimetric data is first established. Based on the Stokes vector, a proposed algorithm to retrieve the power of three scattering mechanisms is given in details. We validate this algorithm with L-band AIRSAR, San Francisco Bay, and results of decomposition are discussed and assessed in detail by being compared with the quad-pol Freeman-Durden decomposition results. Finally, the π/4 mode decomposition is compared with the CTLR (circular transmitting and linear reeving) mode, and with the π/4 mode mδ targets decomposition. The comparison results are analyzed and discussed in detail.

创新点

本文中,将基于模型的目标分解方法应用到 π/4 模式简缩极化数据中。首先推导出全极化相干矩阵与π/4 模式简缩极化斯托克斯矢量之间一般关系表达式。获得体散射和秩为1的单一散射机制的简缩极化斯托克斯矢量表达式,建立RVoG模型的斯托克斯矢量形式。基于该RVoG矢量形式推导出详细的目标分解方法。运用L波段AirSAR 旧金山数据验证该目标分解方法,并且与全极化目标分解结果进行对比分析。最后,对比分析π/4 模式与CTLR模式分解结果,以及π/4 模式下基于模型的目标分解方法与传统m-δ 分解对比结果。

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Correspondence to Wen Hong.

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Guo, S., Li, Y., Hong, W. et al. Model-based target decomposition with the π/4 mode compact polarimetry data. Sci. China Inf. Sci. 59, 062307 (2016). https://doi.org/10.1007/s11432-015-5478-4

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Keywords

  • π/4 mode compact polarimetry
  • mode-based target decomposition
  • Stokes vector
  • RVoG model
  • radar polarimetry

关键词

  • π/4 模式简缩极化
  • 基于模型的目标分解
  • 斯托克矢量
  • RVoG模型l
  • 雷达极化