| Project/Area Number |
13680607
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental dynamic analysis
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| Research Institution | Tokyo Metropolitan University |
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Principal Investigator |
ABO Makoto Tokyo Metropolitan University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助教授 (20167951)
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| Co-Investigator(Kenkyū-buntansha) |
SHIBATA Yasukuni Tokyo Metropolitan University, Graduate School of Engineering, Associate Professor, 大学院・工学研究科, 助手 (10305419)
NAGASAWA Chikao Tokyo Metropolitan University, Graduate School of Engineering, Professor, 大学院・工学研究科, 教授 (80145664)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2002: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2001: ¥2,700,000 (Direct Cost: ¥2,700,000)
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| Keywords | urban air pollution / NO2 / SO2 / differential absorption lidar / scanning lidar / 大気汚染 / チタンファイアレーザー / 色素レーザー |
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| Research Abstract |
We have developed a compact scanning difference absorption lidar (DIAL), which measured spatial distribution of the air pollution gas (ozone, nitrogen dioxide, sulphur dioxide) concentration. Final goal of this study is to observe spatial distribution of these air pollution gas concentrations particularly in urban area and clarified the structure and the diffusion situation of contamination. We summarize provided result as follows ; (1)We developed the laser system, which generated ultraviolet radiation for the sulphur dioxide (SO2) and the ozone measurement. The laser system consists of the Nd:YAG laser pumped dye laser and an optical crystal for second harmonic generation. This laser system is easier than the dye laser to maintain and handle. We succeeded in measurement of wavelength and spectral linewidth using a wavemeter and etalon. (3)For the method of scanning a laser beam and a field of view, we adopted the mirror method then we designed and produced the scanning system. (4)We did computer simulation about accuracy of measurement of a differential absorption lidar and the most suitable wavelength combination. (5)We established processing algorithm of a scanning lidar by computer simulations.
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