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Astrodynamics 2020, 4(4): 393-409 https://doi.org/10.1007/s42064-020-0086-5
Research Article | Issue | Published: 21 November 2020

Guidance, navigation, and control of Hayabusa2 touchdown operations

Show Author's Information Fuyuto Terui1( ),  Naoko Ogawa1,  Go Ono1,  Seiji Yasuda2,  Tetsuya Masuda2,  Kota Matsushima2,  Takanao Saiki1,  Yuichi Tsuda1
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Kanagawa 252-5210, Japan
The 3rd Space Technology Department, Space System Division, NEC Corporation, Tokyo 183-8501, Japan
Keywords:
navigation, control, small body exploration, touchdown, astrodynamics, guidance
Cite this article:
Terui F, Ogawa N, Ono G, et al. Guidance, navigation, and control of Hayabusa2 touchdown operations. Astrodynamics, 2020, 4(4): 393-409. https://doi.org/10.1007/s42064-020-0086-5
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Abstract Full text About this article

Hayabusa2 is a Japanese sample return mission from the asteroid Ryugu. The Hayabusa2 spacecraft was launched on 3 December 2014 and arrived at Ryugu on 27 June 2018. It stayed there until December 2019 for in situ observation and soil sample collection, and will return to the Earth in November or December 2020. During the stay, the spacecraft performed the first touchdown operation on 22 February 2019 and the second touchdown on 11 July 2019, which were both completed successfully. Because the surface of Ryugu is rough and covered with boulders, it was not easy to find target areas for touchdown. There were several technical challenges to overcome, including demanding guidance, navigation, and control accuracy, to realize the touchdown operation. In this paper, strategies and technical details of the guidance, navigation, and control systems are presented. The flight results prove that the performance of the systems was satisfactory and largely contributed to the success of the operation.


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About this article

Guidance, navigation, and control of Hayabusa2 touchdown operations

Show Author's information Fuyuto Terui1( ), Naoko Ogawa1, Go Ono1, Seiji Yasuda2, Tetsuya Masuda2, Kota Matsushima2, Takanao Saiki1, Yuichi Tsuda1
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Kanagawa 252-5210, Japan
The 3rd Space Technology Department, Space System Division, NEC Corporation, Tokyo 183-8501, Japan

Abstract

Hayabusa2 is a Japanese sample return mission from the asteroid Ryugu. The Hayabusa2 spacecraft was launched on 3 December 2014 and arrived at Ryugu on 27 June 2018. It stayed there until December 2019 for in situ observation and soil sample collection, and will return to the Earth in November or December 2020. During the stay, the spacecraft performed the first touchdown operation on 22 February 2019 and the second touchdown on 11 July 2019, which were both completed successfully. Because the surface of Ryugu is rough and covered with boulders, it was not easy to find target areas for touchdown. There were several technical challenges to overcome, including demanding guidance, navigation, and control accuracy, to realize the touchdown operation. In this paper, strategies and technical details of the guidance, navigation, and control systems are presented. The flight results prove that the performance of the systems was satisfactory and largely contributed to the success of the operation.

Keywords: navigation, control, small body exploration, touchdown, astrodynamics, guidance

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Publication history
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Publication history

Received: 17 February 2020
Accepted: 15 May 2020
Published: 21 November 2020
Issue date: December 2020

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© Tsinghua University Press 2020
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