VLF帯大地-電離圏導波管伝搬を用いた電子密度同定問題における適切なパラメタ選択に関する検討

カテゴリ: 論文誌(論文単位)

グループ名: 【A】基礎・材料・共通部門

発行日: 2016/05/01

タイトル(英語): A Consideration on Appropriate Parameters for Identifying Electron Density Profile in the Lower Ionosphere by using VLF Wave Propagation in the Earth-ionosphere Waveguide

著者名: 安藤　芳晃（電気通信大学大学院情報理工学研究科），伊藤　仁（日本無線（株）長野事業所）

著者名(英語): Yoshiaki Ando (Graduate School of Informatics and Engineering, The University of Electro-Commmunications), Hitoshi Ito (Japan Radio Co., Ltd.)

キーワード: VLF帯，大地-電離層導波管，有限差分時間領域法　　very-low-frequency band，earth-ionosphere waveguide，finite-difference time-domain method

要約(英語): We consider an problem identifying electron density profile in the lower ionosphere by observing electric fields at the Earth's surface in very-low-frequency (VLF) band. The identification problem is one of nonlinear inverse problems, and we solve the problem numerically by using the genetic algorithm in this study. The focus of this study is on appropriate parameters to solve the identification problem by using the VLF (22.2 kHz) wave propagating in the Earth-ionosphere waveguide. Numerical results show that the range of the electron density which can be identified is from 107-108 m-3, appropriate discretization of the solution space along the altitude is 10 km, and a sufficient number of observation points are necessary to mitigate the effect of noise.

本誌: 電気学会論文誌A（基礎・材料・共通部門誌） Vol.136 No.5 （2016） 特集：電磁界を用いた自然災害軽減のための観測・予測・解析技術

本誌掲載ページ: 304-309 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejfms/136/5/136_304/_article/-char/ja/