Results 1 to 10 of about 150,245 (261)
Precise GNSS Positioning Using Smart Devices
Sensors, 2017 The recent access to GNSS (Global Navigation Satellite System) phase observations on smart devices, enabled by Google through its Android operating system, opens the possibility to apply precise positioning techniques using off-the-shelf, mass-market ...
Eugenio Realini +3 more
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Precise Point Positioning with Partial Ambiguity Fixing
Sensors, 2015 Reliable and rapid ambiguity resolution (AR) is the key to fast precise point positioning (PPP). We propose a modified partial ambiguity resolution (PAR) method, in which an elevation and standard deviation criterion are first used to remove the low ...
Pan Li, Xiaohong Zhang
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Mokslas: Lietuvos Ateitis, 2013 This paper presents the modeling of a flexure-based precisionpositioning system for micro-positioning uses. The positioningsystem is featured with monolithic architecture, flexure-basedjoints and ultra fine adjustment screws.
Giedrius Augustinavičius +1 more
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Precise Point Positioning Using Dual-Frequency GNSS Observations on Smartphone
Sensors, 2019 The update of the Android system and the emergence of the dual-frequency GNSS chips enable smartphones to acquire dual-frequency GNSS observations. In this paper, the GPS L1/L5 and Galileo E1/E5a dual-frequency PPP (precise point positioning) algorithm ...
Qiong Wu +3 more
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Precise Point Positioning Using Triple GNSS Constellations in Various Modes
Sensors, 2016 This paper introduces a new dual-frequency precise point positioning (PPP) model, which combines the observations from three different global navigation satellite system (GNSS) constellations, namely GPS, Galileo, and BeiDou.
Akram Afifi, Ahmed El-Rabbany
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Updatable learned index with precise positions [PDF]
Proceedings of the VLDB Endowment, 2021 Index plays an essential role in modern database engines to accelerate the query processing. The new paradigm of "learned index" has significantly changed the way of designing index structures in DBMS. The key insight is that indexes could be regarded as learned models that predict the position of a lookup key in the dataset.
Jiacheng Wu 0001 +5 more
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ON THE VISUALIZATION OF POSITIONAL PRECISION [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2021 Abstract. Tasks such as image registration or pose estimation require the determination of transformations based on uncertain observations. Hence, the position of any geometric object transformed according to this estimate is also uncertain, at least in terms of precision. Often the knowledge of uncertainty changes the judgment of individuals.
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Low-Cost COTS GNSS Interference Monitoring, Detection, and Classification System
Sensors, 2023 Interference signals cause position errors and outages to global navigation satellite system (GNSS) receivers. However, to solve these problems, the interference source must be detected, classified, its purpose determined, and localized to eliminate it ...
Johannes Rossouw van der Merwe +8 more
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Frontiers in Ecology and Evolution, 2023 The Tibetan Plateau (TP), known as the third pole, is the highest plateau in the world. It has numerous wetlands, which are important ecological security barriers and plays an important role in mitigating global climate change. This paper employed breaks
Yuhan Chen +11 more
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RTK-Quality Positioning With Global Precise Point Positioning Corrections
Navigation, 2023 Global navigation satellite system (GNSS) precise point positioning (PPP) has potential as an alternative or replacement for real-time kinematic (RTK) processing.
Nacer Naciri, Sunil Bisnath
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