| Project/Area Number |
04452074
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
気象・海洋・陸水学
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| Research Institution | Tokai University |
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Principal Investigator |
OISHI Tomohito Tokai University Faclty of Science Department of Plysics Associate Professor, 理学部, 助教授 (20231730)
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| Co-Investigator(Kenkyū-buntansha) |
SAITO Hiroshi Tokai University Faclty of Marine Science and Technology, 海洋学部, 講師 (50235066)
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| Project Period (FY) |
1992 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥6,900,000 (Direct Cost: ¥6,900,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1992: ¥4,100,000 (Direct Cost: ¥4,100,000)
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| Keywords | REMOTE SENSING / VISIBLE LIGHT / SEA Water / OPTICAL Properties / Shadow / Irradiance Field / Inverse Method / 照度反射率 / 海洋光学 / 溶存有機物 / 蛍光収率 / 可視光リモートセンシング / 放射伝達 / 水中照度、輝度 / 内部反射率 / 水の光学的特性 |
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| Research Abstract |
The inherent optical properties of sea water and nuderwater irradiance fields are important parameters for Ocean color Remote Sensing. From this point of view, we made the numerical evaluation of the enfluence of ship shadow on underwater irradiance fields based on Monte Carlo Method. According to the computations, it is found that measaremeuts of irradiance Reflectance may vary significantlly due to the presence of ship when sun is high and single scatlering albedo is large.
When we intend to apply Renote sensing technique to coastalarea, the knowledge of inherent optical properties of sea water, in particular these of yellow substance, are fundamental.
However, our understandings of yellow substance are very poor. Considering this situation, we determined the spectral absorption coefficient and quantum efficiency factor of yellow substance. Based on measurements, spectral decay constant of absorption coefficient was smaller their usually accepted value. On the other hand, the determined quantar efficiency factor was almost as same value as literatured one.
Based on the above Results, we developed inverse modelly for analysing Remote Seused data which can be applied from open Ocean to coastal area. However, this method needs the information of scatlering function, spectral absorption in and back scatlering coefficients.
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