Satellites and Spacecraft Exploration of energization and Radiation in Geospace "ARASE" (ERG)

In Operation

Project Topics

index
Mar. 29, 2017 Updated

Arase off to Science Operations Phase

Arase off to Science Operations Phase

JAXA confirmed completion of the commissioning phase of ARASE, formerly known as ERG, Exploration of energization and Radiation in Geospace. ARASE has entered its science operations phase. The call was made as the following procedure took place as scheduled and was confirmed; the satellite post launch orbital systems are in place, their functions are determined as fine, all monitoring instruments are installed, and the motions of the monitoring equipment are checked. ARASE is in good condit...

About Exploration of energization and Radiation in Geospace "ARASE" (ERG)

To elucidate high-energy electrons that repeat their generation and disappearance.

Geospace is the region of outer space near the Earth. The radiation belt called the "Van Allen radiation belt" lies within the geospace, and the belt captures a huge volume of highly charged energy particles that exceed mega electron volts.
This project aims at elucidating how highly charged electrons have been born while they generate and vanish repeatedly along with space storms caused by the disturbance of solar wind caused by space storms, and how space storms are developed.

Major Characteristics

Name Exploration of energization and Radiation in Geospace "ARASE" (ERG)
Launch Date December 20, 2016 (JST)
Location Uchinoura Space Center (USC)
Launch Vehicle Epsilon-2
Configuration Weight about 350kg
Orbit Altitude Perigee: about 440 km, Apogee: about 32,000 km
Inclination about 32°
Type of Orbit Elliptical orbit
Period about 570min.
Satellite bus SPRINT bus
Major Scientific Instruments (Scheduled) Extremely high-energy electron experiments (XEP-e)
High-energy electron experiments (HEP-e)
Medium-energy particle experiments - electron analyzer (MEP-e)
Low-energy particle experiments - electron analyzer (LEP-e)
Medium-energy particle experiments - ion mass analyzer (MEP-i)
Low-energy particle experiments - ion mass analyzer (LEP-i)
Magnetic field experiment (MGF)
Plasma wave experiment (PWE)
Software-type wave particle interaction analyzer (S-WPIA)

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