Analysis of dynamic properties of the inner magnetosphere using data assimilation

2015 Fiscal Year Final Research Report

• Project/Area Number: 24740334
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Space and upper atmospheric physics
• Research Institution: The Institute of Statistical Mathematics
• Principal Investigator: Nakano Shin'ya 統計数理研究所, モデリング研究系, 助教 (40378576)
• Project Period (FY): 2012-04-01 – 2016-03-31
• Keywords: データ同化 / リングカレント / プラズマ圏 / 内部磁気圏 / 磁気嵐

Outline of Final Research Achievements

The IMAGE satellite obtained global images of energetic neutral atoms (ENAs) and extreme ultraviolet (EUV), which provide valuable information on the ring current and the plasmasphere, respectively. In this study, we have developed a data assimilation system which assimilates these two imaging data into a combined simulation model of the ring current and the plasmasphere. The data assimilation is achieved by using the ensemble transform Kalman filter. The evaluation with an artificial data set suggested that this newly-developed data assimilation system gives reasonable results.

Free Research Field

データ同化