Results 21 to 30 of about 3,599,562 (270)

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

open access: yesRemote 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   +4 more
doaj   +1 more source

Improved GNSS Ambiguity Fast Estimation Reduction Algorithm

open access: yesSensors, 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   +4 more
doaj   +1 more source

Centimeter-level Positioning by Instantaneous Lidar-aided GNSS Ambiguity Resolution

open access: yes, 2022
High-precision vehicle positioning is key to the implementation of modern driving systems in urban environments. Global Navigation Satellite System (GNSS) carrier phase measurements can provide millimeter- to centimeter-level positioning, provided that ...
Kourosh Khoshelham   +5 more
core   +1 more source

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

open access: yesApplied 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

GNSS antenna array-aided CORS ambiguity resolution [PDF]

open access: yes, 2014
Array-aided precise point positioning is a measurement concept that uses GNSS data, from multiple antennas in an array of known geometry, to realize improved GNSS parameter estimation proposed by Teunissen (IEEE Trans Signal Process 60:2870–2881, 2012 ...
Bofeng Li (11139092)   +1 more
core   +2 more sources

Effective ambiguity checking in biosequence analysis [PDF]

open access: yes, 2005
Reeder J, Steffen P, Giegerich R. Effective ambiguity checking in biosequence analysis. BMC Bioinformatics. 2005;6(1): 153.Background: Ambiguity is a problem in biosequence analysis that arises in various analysis tasks solved via dynamic programming ...
Peter Steffen   +5 more
core   +1 more source

What is Partial Ambiguity?

open access: yes, 2022
International audienceThis paper reflects on the notion of partial ambiguity. Using a framework decomposing ambiguity into distinct layers of analysis, among which are risk and model uncertainty, and allowing for different attitudes toward these layers ...
Berger, Loïc
core   +1 more source

Quantifying neptunium oxidation states in nitric acid through spectroelectrochemistry and chemometrics

open access: yesFrontiers 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   +3 more
doaj   +1 more source

Improving Ambiguity Resolution for Medium Baselines Using Combined GPS and BDS Dual/Triple-Frequency Observations

open access: yesSensors, 2015
The regional constellation of the BeiDou navigation satellite system (BDS) has been providing continuous positioning, navigation and timing services since 27 December 2012, covering China and the surrounding area.
Wang Gao   +4 more
doaj   +1 more source

Real-Time PPP-RTK Performance Analysis Using Ionospheric Corrections from Multi-Scale Network Configurations

open access: yesSensors, 2020
The long convergence time required to achieve high-precision position solutions with integer ambiguity resolution-enabled precise point positioning (PPP-RTK) is driven by the presence of ionospheric delays.
Dimitrios Psychas, Sandra Verhagen
doaj   +1 more source

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