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Accuracy Assessment of Satellite-Based Correction Service and Virtual GNSS Reference Station for Hydrographic Surveying
Journal of Marine Science and Engineering ( IF 2.9 ) Pub Date : 2020-07-20 , DOI: 10.3390/jmse8070542
Mohamed Elsayed Elsobeiey

The aim of this paper is to assess the performance of satellite-based correction service, Trimble PP-RTX, and Virtual Reference Stations (VRS) for bathymetry determination, and check how far these techniques meet the minimum standards of the International Hydrography Organization (IHO) for hydrographic surveys. To this end, a three-hour duration session was conducted at Sharm Obhur using KAU-Hydrography 1 vessel. This session includes Global Navigation Satellite System (GNSS) data at the base station using Trimble SPS855 GNSS receiver, multibeam records using Kongsberg EM 712 multibeam echo sounder, sound velocity profile using Valeport's sound velocity profiler, Applanix POS MV measurements, and real-time PP-RTX corrections. Moreover, the VRS GNSS data was generated using Kingdom of Saudi Arabia Continuous Operation Reference Station network (KSA-CORS). It is shown that the Total Horizontal Uncertainty (THU) and Total Vertical Uncertainty (TVU) of the PP-RTX technique are 5.50 cm and 5.90 cm, respectively, which meets the IHO minimum standards for all survey orders at 95% confidence level. The THU and TVU of the VRS technique, on the other hand, are 5.75 cm and 7.05 cm at 95% confidence level, respectively. These values meet the IHO standards for all survey orders as well. Statistical analysis of the seabed surface differences showed a −0.07 cm average difference between the PP-RTX seabed surface and the reference seabed surface with a standard deviation of 3.60 cm. However, the average difference between the VRS-based seabed surface and the reference seabed surface is −0.03 cm and a standard deviation of 3.61cm.

中文翻译:

基于卫星的校正服务和虚拟GNSS参考站进行水文测量的精度评估

本文旨在评估基于卫星的校正服务,Trimble PP-RTX和用于水深测定的虚拟参考站(VRS)的性能,并检查这些技术在多大程度上满足了国际水文组织(IHO)的最低标准)进行水文调查。为此目的,使用KAU Hydography 1船在沙姆沙姆邦进行了为时3小时的课程。该会议包括使用Trimble SPS855 GNSS接收器的基站的全球导航卫星系统(GNSS)数据,使用Kongsberg EM 712多波束回声测深仪的多波束记录,使用Valeport声速剖面仪的声速剖面,Applanix POS MV测量以及实时PP -RTX更正。此外,VRS GNSS数据是使用沙特阿拉伯王国连续作战参考站网络(KSA-CORS)生成的。结果表明,PP-RTX技术的总水平不确定度(THU)和总垂直不确定度(TVU)分别为5.50 cm和5.90 cm,在95%的置信度水平上满足所有测量订单的IHO最低标准。另一方面,在95%置信度下,VRS技术的THU和TVU分别为5.75 cm和7.05 cm。这些值也符合所有调查订单的IHO标准。海底表面差异的统计分析显示,PP-RTX海底表面与参考海底表面之间的平均差异为-0.07 cm,标准偏差为3.60 cm。但是,基于VRS的海底表面和参考海底表面之间的平均差为-0。
更新日期:2020-07-20
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