...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Surveys in Geophysics: An International Review Journal of Geophysics and Planetary Sciences >Wave Polarization Analyzed by Singular Value Decomposition of the Spectral Matrix in the Presence of Noise
【24h】

Wave Polarization Analyzed by Singular Value Decomposition of the Spectral Matrix in the Presence of Noise

机译：通过噪声存在的奇异值分解分析波极化分析

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Analysis of wave polarization provides wave propagation parameters and enables an identification of modes in space plasmas. It is based on measurements of several components of fluctuating electromagnetic fields. This technique has become a conventional part of modern instrumentation onboard scientific spacecraft. A definition of the degree of polarization can be reduced to a very basic form, i.e., the ratio of a signal's polarized power to its total power. However, this simple definition can have several different realizations which depend mainly on the underlying assumptions about separating the polarized (coherent) part from the unpolarized part (noise). After reviewing polarization of a plane wave in two and three dimensions, we examine the singular value decomposition technique for a complex spectral matrix as well as for a real spectral matrix. The meaning of singular values is explained, and we show to what extent the singular values are able to contribute to a separation between polarized signal and noise. Finally, our theoretical findings are verified with synthetic data as well as with whistler-mode chorus wave observations from the THEMIS spacecraft.
机译：波偏振的分析提供了波传播参数，使得空间等离子体中的模式识别。它基于对电磁场的多个部件的测量值。该技术已成为现代仪器船上科学航天器的传统部分。可以将偏振程度的定义减少到非常基本的形式，即信号的极化功率与其总功率的比率。然而，这种简单的定义可以具有几种不同的实现，主要依赖于关于将极化（相干）部分与非偏振部分（噪声）分离的底层假设。在审查两个和三个维度的平面波的偏振之后，我们检查复杂光谱矩阵的奇异值分解技术以及真实频谱矩阵。解释了奇异值的含义，我们展示了奇异值能够有助于在偏振信号和噪声之间分离的程度。最后，我们的理论发现用合成数据以及来自Themis Spacecraft的惠斯勒模式合唱波观测结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号