JpGU-AGU Joint Meeting 2017

講演情報

[EE] ポスター発表

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-EM14] [EE] Dynamics in magnetosphere and ionosphere

2017年5月20日(土) 10:45 〜 12:15 ポスター会場 (国際展示場 7ホール)

コンビーナ:堀 智昭(東京大学大学院理学系研究科)、田中 良昌(国立極地研究所)、中溝 葵(情報通信研究機構 電磁波計測研究所)、尾崎 光紀(金沢大学理工研究域電子情報学系)

[PEM14-P15] Global mapping of ionospheric plasma velocity distributions using spherical elementary current systems based on SuperDARN data

*中野 慎也1堀 智昭2関 華奈子2西谷 望3 (1.情報・システム研究機構 統計数理研究所、2.東京大学大学院理学系研究科、3.名古屋大学宇宙地球環境研究所)

キーワード:ionospheric convection, SuperDARN, spherical elementary current systems

We have developed a method for estimating the global distribution of ionospheric plasma velocity from the SuperDARN data. The SuperDARN observations have a wide spatial coverage. However, it is difficult to obtain a global ionospheric convection map from the SuperDARN data because individual radars give only line-of-sight components of plasma drift velocity and the data are frequently missing. In our technique, the plasma velocity distribution is represented by a sum of divergence-free spherical elementary current systems, which provides a constraint ensuring the divergence free condition. In this paper, we will demonstrate a preliminary results obtained by our newly developed method.