Realization and Evaluation of Real-Time Uncombined GPS/Galileo/BDS PPP-RTK in the Offshore Area of China’s Bohai Sea

IF 2 4区地球科学 Q2 GEOCHEMISTRY & GEOPHYSICS

Marine Geodesy Pub Date : 2022-03-28 DOI:10.1080/01490419.2022.2057628

Xiao Yin, Hongzhou Chai, W. Xu, Liang Zhao, Huawei Zhu

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引用次数: 3

Abstract

Abstract The real-time kinematic (RTK) technology has been widely used as the high-precision positioning method in the offshore area. However, RTK requires a bi-directional communication and groups measurement errors together, thereby limiting its mass-market applications. Combining the advantages of precise point positioning (PPP) and RTK, PPP-RTK has become one of the hotspot technologies in the mass market. In this contribution, we propose the uncombined multi-GNSS PPP-RTK model using uncalibrated phase delays (UPDs) estimated from the legacy ionosphere-free and Melbourne-Wübbena combination. With the UPDs estimated based on 14 regional stations, we conduct PPP ambiguity resolution (AR) at 3 augmentation stations and derive precise atmospheric corrections, i.e., RMS of zenith tropospheric and slant ionospheric correction can be up to 4.89 mm and 2.20 cm, respectively. After applying atmospheric correction, the correct fixed solution of four on-board kinematic experiments can be better than 95% and the positioning accuracy can be better than 5 cm in both horizontal and vertical direction, showing the encouraging performance similar to RTK in the offshore area.

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实时非组合GPS/Gileo/BDS PPP-RTK在中国渤海近海的实现与评估

摘要实时动态技术（RTK）作为一种高精度的海洋定位方法，得到了广泛的应用。然而，RTK需要双向通信，并将测量误差分组在一起，从而限制了其在大众市场的应用。PPP-RTK结合了精确点定位（PPP）和RTK的优势，已成为大众市场的热点技术之一。在这篇文章中，我们提出了使用从传统的无电离层和Melbourne-Wübbena组合估计的未校准相位延迟（UPD）的非组合多GNSS PPP-RTK模型。利用基于14个区域站的UPD估计，我们在3个增强站进行了PPP模糊度分辨率（AR），并导出了精确的大气校正，即天顶对流层的RMS和倾斜电离层的校正可以高达4.89 mm和2.20 厘米。应用大气校正后，四次机载运动学实验的正确固定解可以优于95%，定位精度可以优于5 cm，显示出类似于RTK在海上区域的令人鼓舞的性能。

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来源期刊

Marine Geodesy 地学-地球化学与地球物理

CiteScore

4.10

自引率

6.20%

发文量

审稿时长

>12 weeks

期刊介绍： The aim of Marine Geodesy is to stimulate progress in ocean surveys, mapping, and remote sensing by promoting problem-oriented research in the marine and coastal environment. The journal will consider articles on the following topics: topography and mapping; satellite altimetry; bathymetry; positioning; precise navigation; boundary demarcation and determination; tsunamis; plate/tectonics; geoid determination; hydrographic and oceanographic observations; acoustics and space instrumentation; ground truth; system calibration and validation; geographic information systems.