10:45 〜 11:00
[PPS01-06] Current Status of Japanese Participation in JUICE (Jupiter Icy Moons Explorer)
キーワード：木星氷衛星探査計画、木星、ガニメデ、氷衛星、エウロパ、カリスト
JUICE (Jupiter Icy Moons Explorer) is ESA's L-class mission during COSMIC VISION 2015–2025 to Explore Jupiter Icy Moons. JUICE was originally planned to be launched by Arian-5 in May-June 2022. In the spring of 2021, it was announced that the launch would be postponed to August-September 2022. The launch was further postponed to 2023 due to the ongoing global COVID-19 outbreak and other factors. By the time of this abstract submission, the launch window in 2023 has not been officially announced yet.
Based on the mission profile of the previous launch window in August-September 2022, JUICE will be inserted into Jupiter's orbit in July 2031 after about 9 years of interplanetary transfer with Earth-Earth-Venus-Earth- Earth gravity assists. JUICE will observe the three Jupiter icy Moons, Europa, Ganymede, and Callisto, which may have subsurface ocean under the icy crusts, and will be the world's first Icy Moon orbiter when it is inserted into Ganymede orbit in December 2034. The nominal mission of JUICE will end in September 2035 after observing the largest Icy Moon in the solar system: Ganymede in detail.
Four Japanese groups were selected to provide part of the four different science instruments onboard JUICE: RPWI (Radio and Plasma Wave Investigation), GALA (Ganymede Laser Altimeter), PEP (Particle Environment Package)/JNA (Jupiter Neutrals Analyzer) and SWI (Submillimeter Wave Instrument). In addition, two Japanese groups were also selected as science Co-Is of two instrument groups JANUS (Jupiter Camera) and J-MAG (Jupiter Magnetometer). ISAS/JAXA is responsible for RPWI, GALA, PEP/JNA, JANUS, J-MAG, and NICT is responsible for SWI.
The science objectives of Japanese participation in JUICE is to understand (1) how the Jupiter system was formed, (2) what are the habitable worlds around gas giants, and (3) the strongest accelerator in our solar system: Jupiter. Through the data obtained by the five instruments in which JUICE-JAPAN participates, the Japanese team will be able to contribute to most of the major science objectives relating with Jupiter System (JANUS, SWI and PEP/JNA), Jupiter/Ganymede magnetosphere (PEP/JNA, RPWI, and J-MAG), and sub-surface ocean in the Icy Moons (GALA, J-MAG, and JANUS).
JUICE-JAPAN will complete the delivery of all hardware for which Japan is responsible to Europe by the end of March 2022. RPWI-Japan completed CDR (Critical Design Review) in July 2018 and finished FM (Flight Model) and FS (Flight Spare) delivery to IRF-Uppsala, Sweden by November 2020. PEP-Japan completed CDR in June 2019 and finished FM and FS delivery to IRF-Kiruna, Sweden by March 2021. GALA-Japan completed CDR in June 2020 and finished FM delivery to DLR, Germany in August 2020. GALA's FS will be delivered to DLR by the end of March 2022. SWI completed CDR in June 2019 and SWI PFM and FS were delivered to MPS, Germany by March 2020.
JUICE is a long-term mission that will last about 15 years from now. In order to make Japan's participation in JUICE successful, it is quite important to pass on the role to the younger generation while maintaining the necessary information.
Based on the mission profile of the previous launch window in August-September 2022, JUICE will be inserted into Jupiter's orbit in July 2031 after about 9 years of interplanetary transfer with Earth-Earth-Venus-Earth- Earth gravity assists. JUICE will observe the three Jupiter icy Moons, Europa, Ganymede, and Callisto, which may have subsurface ocean under the icy crusts, and will be the world's first Icy Moon orbiter when it is inserted into Ganymede orbit in December 2034. The nominal mission of JUICE will end in September 2035 after observing the largest Icy Moon in the solar system: Ganymede in detail.
Four Japanese groups were selected to provide part of the four different science instruments onboard JUICE: RPWI (Radio and Plasma Wave Investigation), GALA (Ganymede Laser Altimeter), PEP (Particle Environment Package)/JNA (Jupiter Neutrals Analyzer) and SWI (Submillimeter Wave Instrument). In addition, two Japanese groups were also selected as science Co-Is of two instrument groups JANUS (Jupiter Camera) and J-MAG (Jupiter Magnetometer). ISAS/JAXA is responsible for RPWI, GALA, PEP/JNA, JANUS, J-MAG, and NICT is responsible for SWI.
The science objectives of Japanese participation in JUICE is to understand (1) how the Jupiter system was formed, (2) what are the habitable worlds around gas giants, and (3) the strongest accelerator in our solar system: Jupiter. Through the data obtained by the five instruments in which JUICE-JAPAN participates, the Japanese team will be able to contribute to most of the major science objectives relating with Jupiter System (JANUS, SWI and PEP/JNA), Jupiter/Ganymede magnetosphere (PEP/JNA, RPWI, and J-MAG), and sub-surface ocean in the Icy Moons (GALA, J-MAG, and JANUS).
JUICE-JAPAN will complete the delivery of all hardware for which Japan is responsible to Europe by the end of March 2022. RPWI-Japan completed CDR (Critical Design Review) in July 2018 and finished FM (Flight Model) and FS (Flight Spare) delivery to IRF-Uppsala, Sweden by November 2020. PEP-Japan completed CDR in June 2019 and finished FM and FS delivery to IRF-Kiruna, Sweden by March 2021. GALA-Japan completed CDR in June 2020 and finished FM delivery to DLR, Germany in August 2020. GALA's FS will be delivered to DLR by the end of March 2022. SWI completed CDR in June 2019 and SWI PFM and FS were delivered to MPS, Germany by March 2020.
JUICE is a long-term mission that will last about 15 years from now. In order to make Japan's participation in JUICE successful, it is quite important to pass on the role to the younger generation while maintaining the necessary information.