2023 Fiscal Year Final Research Report
Millimeter-precision laser ranging system for denser global coverage
| Project/Area Number |
20H01993
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 17040:Solid earth sciences-related
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| Research Institution | Hitotsubashi University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
荒木 博志 国立天文台, RISE月惑星探査プロジェクト, 助教 (10290884)
横田 裕輔 東京大学, 生産技術研究所, 准教授 (30840540)
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 衛星レーザ測距 / 宇宙測地学 / 光計測 / GGOS / 精密軌道決定 |
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| Outline of Final Research Achievements |
This study aimed to demonstrate that Satellite Laser Ranging (SLR) observation, the only optical technology in space geodetic technology, can be achieved with compact and low-cost equipment through the development and performance demonstration of a prototype. The system was downsized to the level that it can be carried by a car by actively using consumer products that have not been used in existing SLR stations. The system was carefully developed from the system design to the evaluation and integration of each component, and finally succeeded in ranging four passes of a low-earth orbit satellite in December 2023. Accuracy better than 1 cm has been obtained on a normal point basis, and further development will enable the SLR system to be deployed globally.
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| Free Research Field |
測地学
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| Academic Significance and Societal Importance of the Research Achievements |
レーザパルスを人工衛星に当て地球の大きさや形を測る技術（SLR）は，地球環境監視の基幹技術であるにも関わらず，局の数は世界で30程度しかない．数を増やして全球展開するためには，既存のもの（多くは数億円から十億円；大きな施設が必要）から，大幅に小型・低価格化する必要がある．本研究ではその可能性を追求するため，民生品を積極的に活用してプロトタイプシステムを作り上げた．乗用車でも運べる程度に小型化し，さらに価格も1千万円以下にした．2023年12月には，本システムで低軌道衛星へのレーザ測距に成功し，国内のみならず海外へもインパクトの大きな成果が得られた．
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