碩士 / 國立交通大學 / 土木工程學系 / 100 / We investigated the bathymetric model over the East China Sea by altimetry-derived gravity. A sub-waveform threshold is used and a Gaussian filter is applied in the retracking processing. Two methods, the Inverse Vening Meinesz (IVM) formula and least square collocation (LSC), are used to derive gravity anomalies from retracked altimeter data. The bathymetric models are constructed by gravity-geological method (GGM) using the altimetry-derived gravity. Different reference models and density contrasts for GGM are taken into account. The use of retracking technique improves the gravity estimation by 3-6 mgal, based on the evaluation with shipborne gravity. The accuracy of the predicted bathymetric model in this study outperforms ETOPO1 DEM model. In shallow sea and abyssal region, the accuracy of the predicted bathymetric model in this study is improved by 4 %.
| Identifer | oai:union.ndltd.org:TW/100NCTU5015076 |
| Date | January 2012 |
| Creators | Cheng, Yunhg-Sheng, 鄭詠升 |
| Contributors | Hwang, Chein-Way, 黃金維 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 65 |
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