Discussion on the Method of Underwater Topographic Survey
At present,underwater terrain measurement is mainly based on GPS,and there is relatively little verification work on the accuracy and stability of PPK and PPP solutions in marine environments.Taking the offshore waters of Jiangsu as the research area,temporary tidal stations were set up in the study area to conduct underwater terrain measurements using different tidal observation modes and non tidal observation modes.The obtained data was compared and analyzed,and the applicability of different modes of underwater terrain measurements was analyzed based on poor data.The results show that,it can provide feasible technical support for underwater terrain measurement in the later stage.The selection of underwater terrain measurement methods in different regions can not only improve work efficiency and data reliability,but also greatly save production costs and shorten project operation periods.
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