[P-EM08] 宇宙天気・宇宙気候

[PEM08-08] Relativistic Electron Precipitation Detections with CALET on the International Space Station

*Alessandro Bruno^1,2、Georgia A. de Nolfo²、Anthony W. Ficklin³、T. Gregory Guzik³、Lauren Blum⁴ (1.Department of Physics, Catholic University of America, Washington, DC, USA、2.Heliophysics Science Division, NASA Goddard Space Flight Center, Greenbelt, MD,、3.Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, USA、4.University of Colorado, Boulder, CO, USA)

キーワード：Relativic Electron Precipitation, Space Weather, Cosmic Rays, Spacecraft Measurements

The CALorimetric Electron Telescope (CALET) is a high-energy astroparticle experiment installed on the International Space Station and operating since October 2015. While conceived for the investigation of the origin and the propagation of galactic cosmic-rays, CALET has been also providing a continuous monitoring of space weather phenomena in the near-Earth environment, including solar energetic particle and relativistic electron precipitation (REP) events. In particular, the low-Earth orbit detections from CALET complement the equatorial observations made by other spacecraft at higher altitudes, such as the twin Van Allen Probes, enabling a more complete picture of energetic electron precipitation and its contribution to the radiation belt dynamics. In this work we present the preliminary results obtained over a four-year (2015-2019) acquisition time.