水下地形测量方法探讨

Discussion on the Method of Underwater Topographic Survey

目前,水下地形测量主要基于GPS进行,对海洋环境下的PPK和PPP解算精度和稳定性的验证工作较少。以江苏近海海域为研究区,通过在研究区域布设临时验潮站,开展不同验潮模式和无验潮模式情形下水下地形测量,对获得的数据对比分析,基于数据较差情况,分析不同模式下水下地形测量的适用性。结果表明:可为后期水下地形测量提供可行性技术支撑,在不同区域水下地形测量方法的选取上不但可以提高外业工作效率和数据可靠性,而且能大大节约生产成本和缩短项目作业工期。

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.