View Item 

Modeling of 3D trajectory of Hayabusa2 re-entry based on acoustic observations

Access Status
Open access
Authors
Nishikawa, Y.
Yamamoto, M.Y.
Sansom, Eleanor
Devillepoix, Hadrien
Towner, Martin
Hiramatsu, Y.
Kawamura, T.
Fujita, K.
Yoshikawa, M.
Ishihara, Y.
Hamama, I.
Segawa, N.
Kakinami, Y.
Katao, H.
Inoue, Y.
Bland, Philip
Date
2022
Type
Journal Article

Metadata
Show full item record
Citation
Nishikawa, Y. and Yamamoto, M.Y. and Sansom, E.K. and Devillepoix, H.A.R. and Towner, M.C. and Hiramatsu, Y. and Kawamura, T. et al. 2022. Modeling of 3D trajectory of Hayabusa2 re-entry based on acoustic observations. Publications of the Astronomical Society of Japan. 74 (2): pp. 308-317.
Source Title
Publications of the Astronomical Society of Japan
DOI
ISSN
Faculty
Faculty of Science and Engineering
School
School of Earth and Planetary Sciences (EPS)
Funding and Sponsorship
Rights
URI
Collection
Abstract

On 2020 December 5 at 17:28 UTC, Japan Aerospace Exploration Agency's Hayabusa2 sample return capsule (SRC) re-entered Earth's atmosphere. The capsule passed through the atmosphere at supersonic speeds, emitting sound and light. The inaudible sound was recorded by infrasound sensors installed by Kochi University of Technology and Curtin University. Based on analysis of the recorded infrasound, the trajectory of the SRC in two cases, one with constant-velocity linear motion and the other with silent flight, could be estimated with an accuracy of 0° 5 in elevation and 1° in direction. A comparison with optical observations suggests a state of flight in which no light is emitted but sound is emitted. In this paper, we describe the method and results of the trajectory estimation.

http://creativecommons.org/licenses/by/4.0/
Except where otherwise noted, this item's license is described as http://creativecommons.org/licenses/by/4.0/