日本地球惑星科学連合2016年大会

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セッション記号 P (宇宙惑星科学) » P-EM 太陽地球系科学・宇宙電磁気学・宇宙環境

[P-EM03] Mesosphere-Thermosphere-Ionosphere Coupling in the Earth's Atmosphere

2016年5月22日(日) 15:30 〜 17:00 A01 (アパホテル&リゾート 東京ベイ幕張)

コンビーナ:*Liu Huixin(九州大学理学研究院地球惑星科学専攻 九州大学宙空環境研究センター)、齊藤 昭則(京都大学大学院理学研究科地球物理学教室)、Chang Loren(Institute of Space Science, National Central University)、新堀 淳樹(京都大学生存圏研究所)、座長:齊藤 昭則(京都大学大学院理学研究科地球物理学教室)

16:45 〜 17:00

[PEM03-20] Realtime 3D tomography of the ionosphere based on GEONET GPS-TEC

*山本 衛1鈴木 翔太1斎藤 享2陳 佳宏3齊藤 昭則4 (1.京都大学生存圏研究所、2.電子航法研究所、3.National Cheng Kung University、4.京都大学理学研究科地球物理学教室)

キーワード:3D tomography, GPS TEC, GEONET, Realtime ionosphere monitoring

Measurement of ionospheric total electron content (TEC) by using the ground-based GPS receivers is now widely used. We refer to it as GPS-TEC. As there are always several GPS satellites available for the measurement, it is a very good tool for constant monitoring of the ionosphere. One of the most dense and wide network of the GPS network is GEONET operated by Geospatial Information Authority of Japan (GSI). This is the network of more than 1200 points over Japan. We have been developing 3D tomography of the ionospheric plasma density from the GEONET data. This tomography technique uses a constrained least squares fit to reconstruct the electron density distributions. Recently we further develop the software system to conduct the GPS-TEC analysis in the realtime basis. In this system we collect “every second” GPS data from GEONET, estimate satellite and receiver biases for true TEC measurement, and obtain 3D tomography reconstruction of the ionosphere every 15 minutes with 10 minutes latency. We will show current status of the 3D tomography analysis and the realtime system.