ARASE is developed by the Japan Aerospace Exploration Agency (JAXA) to explore “geospace”, the space around the Earth. It was launched in December 2016 to explore the radiation belt (Van Allen belt), a region around the Earth where high-energy particles are trapped by Earth’s magnetic field, and the electromagnetic waves and plasmas which involved in the acceleration and loss of radiation particles. Since the radiation belts can have impacts on human activities in space, ARASE aims to investigate the generation process of high-energy particles in space, as well as to promote space weather research to predict the space environment.

Tohoku University has been involved in the development of the Plasma Wave Experiment (PWE) onboard the satellite and the construction of a ground-based observation network to observe auroras and electromagnetic waves in cooperation with ARASE. Image by JAXA
ISAS Arase project
Nagoya University ERG science