頁籤選單縮合
題名 | Acoustic Calibration of Echo Soundings: Applications in Shelf Region off Northern Taiwan=測深值的聲速校正:以臺灣北部路棚區為例 |
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作者 | 宋國士; 陳冠宇; | 書刊名 | Terrestrial, Atmospheric and Oceanic Sciences |
卷期 | 12:4 2001.12[民90.12] |
頁次 | 頁663-684 |
分類號 | 351.923 |
關鍵詞 | 測深值; 聲速校正; 臺灣北部路棚區; Bathymetry; Acoustic correction; Acoustic profiles; Offshore northern Taiwan; |
語文 | 英文(English) |
英文摘要 | With a preset echo sounding velocity, each bathymetric measurement can be Corrected off-line numerically. This article presents an iteration algorithm of acoustic calibration for a representative acoustic profile versus depth of water column obtained in the survey area. In addition, different kinds of acoustic profile, represented by polynomial regression equations, were addressed offshore north Taiwan. Results gave a large variety of patterns in acoustic profile within a small limit of territories in the shelf region, indicating that bathymetric measurements collected off northern Taiwan should be calibrated with much care. However, using an expected mean velocity at 1525 m/s, sounding accuracy with deviation less than 0.2% was obtained on the shelf in the summer. |
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