[P-EM04] Space Weather, Space Climate, and VarSITI

[PEM04-05] Radiation Protection of Humans in Space and Aviation: Current States and Future Needs on the Warning System for Aviation Exposure to SEP (WASAVIES)

*佐藤 達彦¹、石井 守²、片岡 龍峰³、久保 勇樹²、簑島 敬⁴、三好 由純⁵、永松 愛子⁶、塩田 大幸⁵、高島 健⁶、保田 浩志⁷ (1.日本原子力研究開発機構、2.情報通信研究機構、3.極地研、4.海洋研究開発機構、5.名古屋大学、6.宇宙航空研究開発機構、7.広島大学)

キーワード：SEP, Radiation Exposure, Space Weather

Forecast of radiation doses for astronauts as well as aircrews due to the exposure to solar energetic particles (SEP) is one of the greatest challenges in space weather research. In last 5 years, we have developed a WArning System for AVIation Exposure to Solar energetic particles: WASAVIES. In this system, the SEP fluxes incident to the atmosphere are calculated by physics-based models, and they are converted to radiation doses using a database developed on the basis of air-shower simulation. However, it takes approximately 2.5 hours to determine the parameters used in the physics-based models after the detection of GLEs, and thus, the current WASAVIES cannot predict doses during the peak of GLEs. Therefore, we are trying to reduce the time for evaluating the parameters, as well as to develop a nowcast system for the radiation dose due to SEP exposure, under the framework of Project for Solar-Terrestrial Environment Prediction (PSTEP, http://www.pstep.jp/) in Japan. A brief outline of WASAVIES together with our future strategy will be presented at the meeting.