Curriculum Vitaes
Profile Information
- Affiliation
- Associate Professor, Institute of Space and Astronautical Science, Department of Interdisciplinary Space Science, Japan Aerospace Exploration Agency
- Researcher number
- 80873380
- ORCID ID
https://orcid.org/0000-0003-3337-1249- J-GLOBAL ID
- 202001017783214748
- researchmap Member ID
- R000000751
Research Interests
5Research History
3-
Apr, 2019 - Dec, 2019
Education
3Awards
5-
Mar, 2015
Papers
19-
Journal of Geophysical Research: Space Physics, Apr, 2025 Peer-reviewed
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Acta Astronautica, 227 114-125, Feb, 2025 Peer-reviewed
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Springer Aerospace Technology, 695-720, Dec 14, 2024
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Space Science Reviews, 220(1), Jan 24, 2024Abstract Here we describe the novel, multi-point Comet Interceptor mission. It is dedicated to the exploration of a little-processed long-period comet, possibly entering the inner Solar System for the first time, or to encounter an interstellar object originating at another star. The objectives of the mission are to address the following questions: What are the surface composition, shape, morphology, and structure of the target object? What is the composition of the gas and dust in the coma, its connection to the nucleus, and the nature of its interaction with the solar wind? The mission was proposed to the European Space Agency in 2018, and formally adopted by the agency in June 2022, for launch in 2029 together with the Ariel mission. Comet Interceptor will take advantage of the opportunity presented by ESA’s F-Class call for fast, flexible, low-cost missions to which it was proposed. The call required a launch to a halo orbit around the Sun-Earth L2 point. The mission can take advantage of this placement to wait for the discovery of a suitable comet reachable with its minimum $\varDelta $V capability of $600\text{ ms}^{-1}$. Comet Interceptor will be unique in encountering and studying, at a nominal closest approach distance of 1000 km, a comet that represents a near-pristine sample of material from the formation of the Solar System. It will also add a capability that no previous cometary mission has had, which is to deploy two sub-probes – B1, provided by the Japanese space agency, JAXA, and B2 – that will follow different trajectories through the coma. While the main probe passes at a nominal 1000 km distance, probes B1 and B2 will follow different chords through the coma at distances of 850 km and 400 km, respectively. The result will be unique, simultaneous, spatially resolved information of the 3-dimensional properties of the target comet and its interaction with the space environment. We present the mission’s science background leading to these objectives, as well as an overview of the scientific instruments, mission design, and schedule.
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Journal of Evolving Space Activities, 2 n/a, 2024 Peer-reviewedLead authorCorresponding authorIn recent years, nanosatellites and microsatellites have become more than just a technology demonstration tool, but also a tool that can bring about scientific and economic outcomes, mainly in low Earth orbit. On the other hand, the use of microsatellites in interplanetary missions is still limited. There are two main problems in using microsatellites for interplanetary missions. To address the issue of lack of launch opportunities directly to the deep space, we are investigating a microsatellite system that is capable of escaping from Earth orbit, which has relatively frequent launch opportunities such as GTO, into deep space using its own propulsion system. We conducted the conceptual design of a microsatellite for the GEO-X mission, which will perform X-ray imaging of the Earth's magnetosphere from the orbit as far as Lunar Orbit. We designed a 50 kg microsatellite using a 500 N class hybrid kick motor for orbit transfer from GTO, based on previous rideshare launch opportunities. Since suppression of the disturbance torque is important when using such a high thrust propulsion system, a spin-stabilized system is used. A conceptual design was performed taking these considerations into account, and rough feasibility and future issues were extracted.
Misc.
31-
JAXA Research and Development Report, JAXA-RR-24-003 1-134, Feb, 2025 Peer-reviewed
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地球電磁気・地球惑星圏学会総会及び講演会(Web), 156th, 2024
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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Journal of Evolving Space Activities, 1 n/a, 2023 Peer-reviewedThe low reliability of nano-satellites has become a problem, with the cause often being defects in the design and manufacturing process. It is required to take sufficient measures to account for those defects through ground tests to reduce on-orbit failures. The model-based fault diagnosis method can prevent oversight of fault candidates and compensate for a lack of knowledge in human-based diagnosis. Since the developing time of nano-satellites is limited, fault diagnosis needs to be carried out efficiently also while being careful not to cause secondary faults. This paper presents a novel method that can find the appropriate command to verify candidates of fault location in a satellite. The proposed method can consider the side effect of a command and the efficiency of narrowing them down by using the information transmission path model. In the case study, the proposed method is applied to an earth-orbiting 6U CubeSat, and this case study reveals that 33% of the failures that occur in ground tests can apply to the proposed method. In addition, the proposed method can identify the fault location of some of these failures, although there are several limitations to implementing the proposed method in the actual satellite development.
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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Initial results report and mission plan for the lunar impact flash camera DELPHINUS onboard EQUULEUS宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 67th, 2023
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宇宙科学技術連合講演会講演集(CD-ROM), 61st ROMBUNNO.3G04, 2017
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The Proceedings of the Space Engineering Conference, 2015 _B04-1_-_B04-6_, 2015 Peer-reviewed
Presentations
82Works
2Research Projects
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科学研究費助成事業 学術変革領域研究(B), 日本学術振興会, Oct, 2020 - Mar, 2023
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Sep, 2016 - Mar, 2019
