| Presentation | 1998/8/28 On the ambient noise of '97 tomography experiments east of Izu-Ogasawara Trench Toshiaki Nakamura, Yoshimitsu Maejima, Hidetoshi Fujimori, Kazuo Barada, Iwao Nakano, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | Three dimensional tomography experiment was carried out by Japan Marine Sci.and Technology Center, using the 200Hz tomography system in the Kuroshio extension and recycling area with about 1000km X 1000km east of the Izu-Ogasawara Trench between July and October 1997. The two-way propagation experiment was started on July 20th in the transmission interval of every 6 hours, and every 3 hours in August. All equipment was recovered on October the first. In this report, receiving data and the S/N ratio of the experiment is described. After the system recovery, the correlation processing was carried out to converte into the pulse train from B-mode data recorded in the hard disk and the histogram of receiving signal level was obtained. As the result, it was proven that average S/N ratio in present experiment was around 20dB. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Ocean acoustic tomography / Deep sea ambient noise / Noise in the North Pacific Ocean |
| Paper # | US98-41 |
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| Conference Information | |
| Committee | US |
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| Conference Date | 1998/8/28(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Vice Chair | |
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| Paper Information | |
| Registration To | Ultrasonics (US) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | On the ambient noise of '97 tomography experiments east of Izu-Ogasawara Trench |
| Sub Title (in English) | |
| Keyword(1) | Ocean acoustic tomography |
| Keyword(2) | Deep sea ambient noise |
| Keyword(3) | Noise in the North Pacific Ocean |
| 1st Author's Name | Toshiaki Nakamura |
| 1st Author's Affiliation | Japan Marine Science and Technology Center() |
| 2nd Author's Name | Yoshimitsu Maejima |
| 2nd Author's Affiliation | Japan Marine Science and Technology Center |
| 3rd Author's Name | Hidetoshi Fujimori |
| 3rd Author's Affiliation | Japan Marine Science and Technology Center |
| 4th Author's Name | Kazuo Barada |
| 4th Author's Affiliation | Japan Marine Science and Technology Center |
| 5th Author's Name | Iwao Nakano |
| 5th Author's Affiliation | Japan Marine Science and Technology Center |
| Date | 1998/8/28 |
| Paper # | US98-41 |
| Volume (vol) | vol.98 |
| Number (no) | 257 |
| Page | pp.pp.- |
| #Pages | 8 |
| Date of Issue | |