Radiation Belt Monitoring and Forecast in Japan
- Paper number
IAC-05-D5.1.02
- Author
Dr. Takahiro Obara, National Information and Communications Technology, Japan
- Coauthor
Dr. Tateo Goka, Japan Aerospace Exploration Agency (JAXA), Japan
- Year
2005
- Abstract
Japan has been conducting continuous measurements of radiation belt particles bu installing instruments on many satellites. The radiation belt particle behavior has been studied by geostationary satellites such as GMS, ETS-V, and DRST. With a geostationary transfer orbit, MDS-1 measured an entire radiation belt. Akebono satellite studied off-equatorial region of the radiation belt. With these data it was found that radiation belt electrons are very dynamical. MeV electrons in the outer radiation belt disappear during the main phase of the geomagnetic storm due to an adiabatic deceleration as well as enhanced convection. Rebuilding of the outer radiation belt is made by a sufficient supply of intermediate-energy electrons and these source electrons are accelerated internally up to the MeV energy range. Location of a newly appeared outer radiation belt depends on the bigness of the magnetic storm. Appearance of intense whistler mode chorus emissions coincides with the MeV electron flux peak. Integration of AL index is a good indicator for the MeV electron increase, which gives us a clue for the radiation belt forecast. We are conducting a real-time magnetosphere simulation by using MHD code with real-time solar wind data by ACE satellite to obtain a real-time magnetic activity. Effort is also being made to obtain MeV electron profile in outer radiation by using the real-time plasma data at geostationary satellite with a real-time magnetic activity. We will also demonstrate future satellite plans, which will give us a continuous radiation belt data at several locations in the magnetosphere.
- Abstract document
- Manuscript document
IAC-05-D5.1.02.pdf (🔒 authorized access only).
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