Challenge to real-time 3-dimensional ionosphere tomography

2017 Fiscal Year Final Research Report

• Project/Area Number: 26630182
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Measurement engineering
• Research Institution: Kyoto University
• Principal Investigator: Yamamoto Mamoru 京都大学, 生存圏研究所, 教授 (20210560)
• Co-Investigator(Kenkyū-buntansha): 齊藤 昭則 京都大学, 理学研究科, 准教授 (10311739) ; 齋藤 享 国立研究開発法人海上・港湾・航空技術研究所, 電子航法研究所, 研究員 (40392716)
• Research Collaborator: CHEN CHIA-HUNG National Cheng-Kung University, 理学部, 助教 ; SEEMALA GOPI Indian Institute of Geomagnetism, 研究員 ; SSESSANGA NICHOLAS Chungnam National University, Space Science Laboratory, 研究員
• Project Period (FY): 2014-04-01 – 2018-03-31
• Keywords: 電離圏電子数 / ３次元トモグラフィー / 電離圏構造 / GPS観測網 / リアルタイムモニタ

Outline of Final Research Achievements

The purpose of this study is to sophisticate three-dimensional tomographic analysis of ionospheric electron density over Japan using GEONET GPS information network by Geographical Survey Institute. From four years of research, 1) We developed a three-dimensional tomographic analysis program using constrained least-squares fitting method, and succeeded in automating the estimation of the TEC absolute value to the final tomography results, 2) We utilized one-second GPS-TEC data from 200 receiving stations acquired by the Electronic Navigation Research Institute, and realized real-time data service of the three-dimensional tomography at every 15 minutes with latency of 5 minutes, 3) We constructed a software system for the GEONET past data analysis, and 4) We carried out statistical comparison between tomographic analysis results and other observation data.

Free Research Field

超高層大気物理学