應用潮位加值模式從事水深測量之潮高修正

Application of Value-Added Tide Model for Tide Correction during Depth Sounding

蔡宗旻(Tsung-Min Tsai) ； 顏沛華(Pei-Hwa Yen) ； 莊文傑(Wen-Jye Juang) ； 龔興南(Heng-Nam Kong)

《測量工程》 53卷1&2期 (2011/06) Pp. 7-18

https://doi.org/10.29983/JSE.201106.0002

摘要

以潮汐分區(Tidal Zone)獲取潮位改正數據其方法係以水深測量作業期間測區所在潮汐分區之改正參數計算測區的潮位值，此種水深測量潮位修正方式需事先花費龐大心力建置潮汐分區並建立屬性資料（振幅比及潮時延遲）。本文利用NAO99b潮汐模式作加值利用後，可隨現場水深測量作業即時估算潮高或作事後處理進行潮高修正，以提升海域水深測量精度。本文以苗栗外海實測結果爲測試案例，潮高估算誤差RMS值約爲0.124m，符合美國工兵署水深測量手冊一等水準測量在海岸地區規範中潮位修正之誤差門檻。

關鍵字

潮汐分區 ； NAO99b ； 水深測量 ； 即時潮高修正

並列摘要

The Co-tidal chart can be potentially used for tide correction to improve depth sounding accuracy however it require a lot of manpower and time to establish the tidal zone and correlate meta data (amplitude ratio and tidal phase difference). This research uses the value-added NAO99b ocean tide model to simulate tidal condition real-time for tide correction during depth sounding. The present result is useful in its simplicity and easy to apply. On-site test has been carried out in Miaoli maritime space with a GPS buoy and RTK GPS depth sounding operation and result a RMS value of 0.124m tide variation which meet the criteria of U.S. Army Corps of Engineers tide correction standard.

並列關鍵字

Tidal zone ； NAO99b ； Depth sounding ； Tide correction real-time