使用GPS 多天線浮標觀測高雄港平均海水面

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Title:	使用GPS 多天線浮標觀測高雄港平均海水面 Observing Mean Sea Level at the Port of Kaohsiung Using a Buoy with Multiple GPS Antennae
Authors:	曾清涼趙朋沅高玉惠徐博賢余致義鄭凱謙
Contributors:	國立成功大學衛星資訊研究中心國立中正大學應用地球物理與環境科學研究所中興測量有限公司嘉南藥理科技大學應用空間資訊系國立成功大學測量及空間資訊學系
Keywords:	平均海水面 GPS浮標潮位站潮位儀零點 Mean Sea Level GPS Buoy Tide Gauge Tide Gauge Zero
Date:	2009-08-27
Issue Date:	2011-11-14 14:31:36 (UTC+8)
Abstract:	國家級高程基準的維護有賴潮位站提供的精準、正確的潮位。台灣長期海水面觀測由於受儀器汰換更新、參考水準點遺失、地震或其他因素之影響，造成部份潮位站(Tide Gauge)的潮位零點(Tide Gauge Zero)位置變動，間接影響潮位資料的正確性。本研究使用一裝載三具大地測量等級天線之GPS浮標(GPS Buoy)，於高雄港潮位站旁進行三次各72小時連續觀測，並與潮位站觀測進行共站的比對。本研究進行港區的水面觀測與浮標姿態的計算。經過浮標與潮位資料計算後，估計高雄港潮位儀的大地起伏值為19.631 ± 2.5 mm，此結果可提供潮位站位置的變化情形，可納入未來的潮位站維護工作的一部分，以提高水面資料觀測的品質。 Accurate water level observations collected by tide gauges are essential for establishing a national vertical datum. Some of the tide gauges in Taiwan have suffered change of the tide gauge zero due to replacement of instruments, loss of tide gauge benchmark, coseismic displacement and others. As a result, the accuracy of the water level measurements from those gauges is in jeopardy. A GPS buoy with 3 geodeticgrade antennae was deployed next to the tide gauge at Port Kaohsiung for a 72-hour continuous data collection. The GPS solution was compared with tide gauge records. The geoid undulation at the tide gauge is estimated to be 19.631 � 2.5 mm with respect to the GRS80 Ellipsoid. The information can be adopted in the regular maintenance of the gauge to ensure the fidelity of its water level measurements.
Relation:	第28屆測量及空間資訊研討會，起迄日：2009/8/27~2009/8/28，地點：中央大學
Appears in Collections:	[Dept. of Applied Geoinformatics] Proceedings

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