[PEM19-P15] The observational study for high energy particles below L=2.1 using Hisaki
Keywords:High energy particle, Hisaki, Low altitude
The Hisaki launched in November 2013 has been observing planets for more than 6 years. We have summarized the count rates caused by radiation and clarified that the trend is dependent on solar activity in orbital regions with L-values greater than 1.8. In addition, it was confirmed that the count increased several times with a timescale of several hours in response to solar activity like SEP. These phenomena were also captured by radiation monitors onboard the ISS in the orbital region of higher L-values (L>3) and were recognized as SEP particle injection. However, no clear observational evidence has been obtained for the behavior near L-value 2.
In this presentation, we will discuss the behavior of high-energy particle at various time constants in the low-altitude region around Earth.