基于CORS-RTK无验潮的海岸带水下地形测量精度分析  

Accuracy analysis of underwater topographic survey in coastal zone based on CORS-RTK without tide survey

作　　者：牛冲[1] NIU Chong(Shandong GEO-Surveying&Mapping Institute,Jinan 250000,China)

机构地区：[1]山东省地质测绘院,山东济南250000

出　　处：《海洋测绘》2021年第6期36-39,共4页Hydrographic Surveying and Charting

基　　金：山东省地质测绘院科技创新发展基金(chyky201902)。

摘　　要：为了探究连续运行参考站网的实时动态相对定位(continuously operating reference stations-real time kinematic, CORS-RTK)无验潮技术在海岸带水下地形测量精度问题,以单波束测深数据为例,通过对比分析主测线与检查线交叉点误差以及有验潮和无验潮重合点误差两种方式,对基于CORS-RTK无验潮的海岸带水下地形测量数据精度进行分析。结果表明,CORS-RTK无验潮水下地形测量技术获取的测深点数据不符值比例为2.82%,说明CORS-RTK无验潮水下地形测量具有较高的可靠性;无验潮与验潮站相比,高程互差波动在-0.12~0.32 m之间,平均值为0.11 m,且偏差在0.2 m以内的测深点占总样本的93.40%,说明有验潮与无验潮两种水下地形测量结果具有较好的一致性,可为CORS-RTK无验潮技术在海岸带水下地形测量中的广泛应用提供参考。In order to explore the performance of CORS-RTK technology in underwater topographic survey in coastal zone, single-beam echo sounding data was taken as an example to analyze the accuracy of underwater topographic survey data in coastal zone based on CORS-RTK without tidal survey by comparing the error of the intersection points between the main survey line and the inspection line and the error of the coincidence points with and without tidal survey.The result demonstrates that the discrepancy ratio of sounding point data obtained by CORS-RTK topographic survey without tidal measurement is 2.82%,which indicates that CORS-RTK topographic survey without tidal measurement has high reliability.And the deviation value of the coincidence points with and without tidal survey fluctuated between-0.12 m and 0.32 m, with an average value of 0.11 m, and the sounding points with a deviation within 0.2 m accounted for 93.40% of the total samples.The results show that there is a good agreement between the two kinds of underwater topographic survey results, which can provide a reference for the extensive application of CORS-RTK technology in underwater topographic survey of coastal zones.

关 键 词：水下地形测量 CORS-RTK技术 海岸带 无验潮 精度分析 

分 类 号：P229.1[天文地球—大地测量学与测量工程]