Warning system for aviation exposure to solar energetic particle (WASAVIES)

Sato, Tatsuhiko   ; Kataoka, Ryuho*; Yasuda, Hiroshi*; Kubo, Yuki*; Ishii, Mamoru*; Miyake, Shoko*; Park, I.*; Miyoshi, Yoshizumi*

Estimation 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. We are therefore developing a WArning System for AVIation Exposure to Solar energetic particle (WASAVIES), under the framework of Project for Solar-Terrestrial Environment Prediction (PSTEP). In the system, the radiation doses due to SEP exposure at flight altitudes are calculated on the basis of physics-based models and databases with four free parameters, which express the absolute value, power index, and time profiles of SEP fluxes near the sun, and the pitch angle incident to the magnetosphere. Thus, WASAVIES can estimate not only the current value but also time variation of the aircrew doses after a GLE event occurs. A brief outline of WASAVIES together with the status of on-going research subjects such as development of the web-based nowcast and forecast system will be presented at the meeting.