Results 11 to 20 of about 14,775 (232)

Precision-Aided Partial Ambiguity Resolution Scheme for GNSS Attitude Determination [PDF]

The International Technical Meeting of the The Institute of Navigation, 2023
The use of carrier phase data play an important role for high-precision Global Navigation Satellite Systems (GNSS) positioning solutions, such as Real-Time Kinematic (RTK). Similarly, precise orientation information can be obtained with multi-antenna setups which exploit carrier phase observables. The availability of high precision navigation solutions
Castro Arvizu, Juan Manuel, Medina, Daniel, Vilà-Valls, Jordi   +2 more
openaire   +1 more source

Sequential Ambiguity Resolution Method for Poorly-Observed GNSS Data

Remote Sensing, 2021
Integer ambiguity resolution is required to obtain precise coordinates for the global navigation satellite system (GNSS). Poorly observed data cause unfixed integer ambiguity and reduce the coordinate accuracy.
Haiyang Li, Guigen Nie, Shuguang Wu, Yuefan He   +3 more
doaj   +1 more source

A Partial Carrier Phase Integer Ambiguity Fixing Algorithm for Combinatorial Optimization between Network RTK Reference Stations

Sensors, 2021
In the face of a complex observation environment, the solution of the reference station of the ambiguity of network real-time kinematic (RTK) will be affected.
Shouhua Wang, Zhiqi You, Xiyan Sun
doaj   +1 more source

A Multi-Frequency Galileo PPP-RTK Convergence Analysis with an Emphasis on the Role of Frequency Spacing

Remote Sensing, 2021
The single-receiver integer ambiguity resolution-enabled variant of precise point positioning (PPP), namely PPP-RTK, has proven to be crucial in reducing the long convergence time of PPP solutions through the recovery of the integerness of the user ...
Dimitrios Psychas, Peter J. G. Teunissen, Sandra Verhagen   +2 more
doaj   +1 more source

Improved GNSS Ambiguity Fast Estimation Reduction Algorithm

Sensors, 2023
The fast and accurate solution of integer ambiguity is the key to achieve GNSS high-precision positioning. Based on the lattice theory of high-dimensional ambiguity solving, the reduction time consumption is much larger than the search time consumption ...
Xinzhong Li, Yongliang Xiong, Weiwei Chen, Shaoguang Xu, Rui Zhang   +4 more
doaj   +1 more source

Single-Frequency GPS/BDS RTK and INS Ambiguity Resolution and Positioning Performance Enhanced with Positional Polynomial Fitting Constraint

Remote Sensing, 2020
Single-frequency GPS/BeiDou navigation satellite system (BDS) real-time kinematic (RTK) and inertial navigation system (INS) integration has wide range of application prospects due to the global deployment of GPS along with the rapid development of BDS ...
Hang Yu, Houzeng Han, Jian Wang, Haiping Xiao, Chuanyang Wang   +4 more
doaj   +1 more source

Evaluation of Real-Time Kinematic Positioning and Deformation Monitoring Using Xiaomi Mi 8 Smartphone

Applied Sciences, 2022
Modern low-cost electronic devices can achieve high precision for global navigation satellite systems (GNSSs) and related applications. Recently, the pseudo-range and carrier phase have been directly obtained from a smartphone to establish a professional-
Shulin Zeng, Cuilin Kuang, Wenkun Yu
doaj   +1 more source

Quantifying neptunium oxidation states in nitric acid through spectroelectrochemistry and chemometrics

Frontiers in Nuclear Engineering, 2023
Controlled-potential in situ thin-layer spectropotentiometry was leveraged to generate visible/near-infrared (VIS/NIR) absorption spectral data sets for the development of chemometric models to quantify Np(III/IV/V/VI) oxidation states in HNO3.
Luke R. Sadergaski, Hunter B. Andrews, Sara E. Gilson, Adam J. Parkison   +3 more
doaj   +1 more source

Integrity Monitoring of PPP-RTK Positioning; Part I: GNSS-Based IM Procedure

Remote Sensing, 2021
Nowadays, integrity monitoring (IM) is required for diverse safety-related applications using intelligent transport systems (ITS). To ensure high availability for road transport users for in-lane positioning, a sub-meter horizontal protection level (HPL)
Kan Wang, Ahmed El-Mowafy, Weijin Qin, Xuhai Yang   +3 more
doaj   +1 more source

G4 Multi-constellation Precise Point Positioning Service for High Accuracy Offshore Navigation [PDF]

TransNav, 2017
Fugro is operating a global GNSS infrastructure for the delivery of high-accuracy multi-constellation Precise Point Positioning (PPP) service, named G4.
Javier Tegedor, Ole Ørpen, T. Melgard, Dariusz Lapucha, H. Visser   +4 more
doaj   +1 more source