Effect of different registration methods on precision of orientation based on RTK registration/georeferencing mode

Hu, Shengming; Liu, Zhen; Chen, Zhijian; Wan, Chenghui; Chun, Tang; Xiong, Wen

doi:10.1080/1064119x.2019.1574324

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…Firstly, an effective reference station cannot be established in the wild and the vast sea area. Secondly, the positioning accuracy will decrease rapidly with the increase of the baseline length [ 3 ].…”

Section: Introductionmentioning

confidence: 99%

Improving precise point positioning performance based on Prophet model

Liao

Yang

2021

PLoS ONE

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Precision point positioning (PPP) is widely used in maritime navigation and other scenarios because it does not require a reference station. In PPP, the satellite clock bias (SCB) cannot be eliminated by differential, thus leading to an increase in positioning error. The prediction accuracy of SCB has become one of the key factors restricting positioning accuracy. Although International GNSS Service (IGS) provides the ultra-rapid ephemeris prediction part (IGU-P), its quality and real-time performance can not meet the practical application. In order to improve the accuracy of PPP, this paper proposes to use the Prophet model to predict SCB. Specifically, SCB sequence is read from the observation part in the ultra-rapid ephemeris (IGU-O) released by IGS. Next, the SCB sequence between adjacent epochs are subtracted to obtain the corresponding SCB single difference sequence. Then using the Prophet model to predict SCB single difference sequence. Finally, the prediction result is substituted into the PPP positioning observation equation to obtain the positioning result. This paper uses the final ephemeris (IGF) published by IGS as a benchmark and compares the experimental results with IGU-P. For the selected four satellites, compared with the results of the IGU-P, the accuracy of SCB prediction of the model in this paper is improved by about 50.3%, 61.7%, 60.4%, and 48.8%. In terms of PPP positioning results, we use Real-time kinematic (RTK) measurements as a benchmark in this paper. Positioning accuracy has increased by 26%, 35%, and 19% in the N, E, and U directions, respectively. The results show that the Prophet model can improve the performance of PPP.

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Section: Introductionmentioning

confidence: 99%

Improving precise point positioning performance based on Prophet model

Liao

Yang

2021

PLoS ONE

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“…Such a method tends to produce errors, and the accuracy strongly relies on the surveyor's experience (Assali et al, 2014;Huang et al, 2016Huang et al, , 2019Huang et al, , 2020aHuang et al, , 2020bIdrees et al, 2018). The development of three-dimensional laser scanning (3D-LS) technology has led to great advances in research on rock discontinuities (Tomás et al, 2018;Hu et al, 2019cHu et al, , 2020bXu et al, 2020). However, using 3D-LS technology to identify rock discontinuities accurately and efficiently for geological applications is difficult (Cinar et al, 2017;Riquelme et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Three-Dimensional Laser Scanning-Based Method for Identifying Rock Discontinuities

Hu¹,

Jianglin²,

Hu³

et al. 2021

Preprint

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Manual measurement of rock discontinuities is time-consuming and subjective according to the experience of the surveyor. This work proposes a three-dimensional laser scanning-based method for the semi-automatic identification of rock discontinuities. Multisite cloud scanning is performed with real-time kinematic (RTK)-assisted orientation to estimate the rock fracturing degree; then, discontinuity orientations are extracted with the man–machine interactive method or automatic method. The proposed method was applied to actual examples to illustrate its accuracy at identifying rock discontinuities. The sensitivity of the identification accuracy to different parameters was investigated.

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An Optimal 3D-LS Method with High Accuracy and Efficiency to Identify Rock Discontinuities Considering Its Development Degree and Its Application

Gao

Wan

et al. 2021

Developments in Sustainable Geomaterials and Environmental Geotechnics

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Effect of different registration methods on precision of orientation based on RTK registration/georeferencing mode

Cited by 3 publications

References 20 publications

Improving precise point positioning performance based on Prophet model

Improving precise point positioning performance based on Prophet model

Three-Dimensional Laser Scanning-Based Method for Identifying Rock Discontinuities

An Optimal 3D-LS Method with High Accuracy and Efficiency to Identify Rock Discontinuities Considering Its Development Degree and Its Application

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