| Project/Area Number |
25740011
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | National Institute of Information and Communications Technology |
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Principal Investigator |
ホビガー トーマス 独立行政法人情報通信研究機構, 電磁波計測研究所時空標準研究室, 主任研究員 (20533798)
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| Project Period (FY) |
2013-04-01 – 2015-03-31
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| Project Status |
Discontinued (Fiscal Year 2014)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Keywords | GNSS-R / GLONASS / sea-level / software-defined radio / sea level / reflectometry |
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| Outline of Annual Research Achievements |
The first year of the project was devoted to hard- and software development based on the principles of software-defined radio. A GLONASS-R prototype system has been developed with off-the-shelf components only. Although all signal processing has been implemented on the software side, real-time operation could be verified already in the first months of the project. After further optimization, bug-fixing and performance tests it was clear that I would be able to test the system earlier than anticipated. After a basic 48h conceptual test at our institute in Tokyo, it was decided to ship the system to the Onsala Space Observatory, Sweden, that has an operational GPS-based GNSS-R system. Over a period of two weeks in October 2013, GPS-based GNSS-R sea-level monitoring and measurements with the newly developed GLONASS-R system were carried out in parallel. In addition, data from co-located tide gauge measurements were available for comparison. With the data taken from the field experiment not only the feasibility of the GLONASS-R concept could be demonstrated, but it could be shown that for calm sea surface conditions, the GLONASS-R prototype can achieve an accuracy of about 1-2 cm, outperforming other GNSS-R systems at that site. A corresponding peer-reviewed paper has been published and cooperations for future experiments and validation campaigns could be established. However, as I moved to a new position abroad I returned the budget for the second year. Future collaboration with Japanese institutes will include the work carried out within this project.
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