碩士 / 國立臺北大學 / 不動產與城鄉環境學系 / 106 / Sea surface heights (SSHs) are crucial to the application of marine geodesy, and they also can be used to get the information of earth gravity field, ocean currents, tides, and geoid for the purpose of providing research data in oceanography and geophysics. In addition, they are helpful in the economic development, including offshore resource exploration, coastal engineering, marine aquaculture, and so on. Measuring SSHs areas through ship-borne GPS data in coastal won’t be affected by the bad altimeter radar waveforms. Besides, it can measure SSHs linearly and provide wide-range and high resolution observations. Thus, it’s a promising technique for SSHs measurement. Precise point positioning (PPP) technique can be used to determine SSHs without the need for a reference station so it can improve the work efficiency. In this study, ship-borne GPS data is used to calculate ellipsoidal height with PPP technique. The calculations will be corrected through Gaussian filter and the global ocean tide model in order to evaluate the accuracy and precision of SSHs from ship-borne GPS data. CSRS-PPP from Natural Resources Canada (NRCan) is be used to process PPP in this study, and its results after correction will be used to evaluate the accuracy and precision of SSHs by means of static tests, crossover difference analysis, and comparison with DTU10 mean sea surface(MSS) model.
The static tests shows that the horizontal precision of the calculations from the ship-borne GPS data is about 12.1cm-15.7cm, and the vertical precision after tidal correction is about 12.5cm-14.1cm. The results of crossover difference analysis show that the values of root mean square (RMS) after crossover adjustment are about 7.4cm-14.9cm, and the results of the comparison with DTU10 MSS suggest that the standard deviation of the differences after crossover adjustment is about 11.9cm-18.3cm.
| Identifer | oai:union.ndltd.org:TW/106NTPU0133011 |
| Date | January 2018 |
| Creators | WU, YAN-RUEI, 吳彥叡 |
| Contributors | YEH, TA-KANG, 葉大綱 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 62 |
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