Results 131 to 140 of about 18,179 (315)
Augment BeiDou real-time precise point positioning using ECMWF data
Earth, Planets and Space, 2018 The Chinese BeiDou Navigation Satellite System has shown potential for precise positioning with a comparable accuracy to that of the Global Positioning System (GPS) at the centimeter level for the horizontal component and the sub-centimeter level for the
Kemin Zhu +5 more
doaj +1 more source
Pulsar Navigation in the Solar System [PDF]
arXiv, 2008 The X-ray Navigation and Autonomous position Verification (XNAV) is tested which use the Crab pulsar under the Space Test Program that use starlight refraction. It provide the way that the spacecraft could autonomously determine its position with respect to an inertial origin.
arxiv
BeiDou-3 orbit and clock quality of the IGS Multi-GNSS Pilot Project [PDF]
Advances in Space Research, 2022 P. Steigenberger +5 more
semanticscholar +1 more source
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.This paper proposes a Gaussian unscented Kalman filter (GUKF) algorithm for improving the accuracy of ultra wide‐band indoor positioning systems. By utilising a Gaussian function for data smoothing and filtering, the GUKF algorithm achieves higher positioning accuracy compared to other methods such as the unscented Kalman filter, least squares, and ...
DaLong Sun +7 more
wiley +1 more source
Characterization of multi-GNSS between-receiver differential code biases using zero and short baselines [PDF]
, 2015 © 2015, Science China Press and Springer-Verlag Berlin Heidelberg. Care should be taken to minimize adverse impact of receiver differential code biases (DCBs) on global navigation satellite system (GNSS)-derived ionospheric parameters. It is therefore of
Brunini +30 more
core +2 more sources
GPS Multipath Detection in the Frequency Domain [PDF]
arXiv, 2017 Multipath is among the major sources of errors in precise positioning using GPS and continues to be extensively studied. Two Fast Fourier Transform (FFT)-based detectors are presented in this paper as GPS multipath detection techniques. The detectors are formulated as binary hypothesis tests under the assumption that the multipath exists for a ...
arxiv
IET Radar, Sonar &Navigation, Volume 19, Issue 1, January/December 2025.(1) A robust stochastic modelling approach is proposed for PPP/UWB tightly coupled integration using optimised variance component estimation. (2) In our proposed approach, the VCE‐based stochastic model is optimised with a robust estimation strategy and an adaptive moving window filter technique.
Tonghui Shen +2 more
wiley +1 more source
Investigation on reference frames and time systems in Multi-GNSS [PDF]
, 2018 Receivers able to track satellites belonging to different GNSSs (Global Navigation Satellite Systems) are available on the market. To compute coordinates and velocities it is necessary to identify all the elements that contribute to interoperability of ...
Caporali, A., Nicolini, L.
core +2 more sources
Query-based Interactive Recommendation by Meta-Path and Adapted Attention-GRU [PDF]
arXiv, 2019 Recently, interactive recommender systems are becoming increasingly popular. The insight is that, with the interaction between users and the system, (1) users can actively intervene the recommendation results rather than passively receive them, and (2) the system learns more about users so as to provide better recommendation.
arxiv
An Improved A ∗ Algorithm Based on Simulated Annealing and Multidistance Heuristic Function
International Journal of Intelligent Systems, Volume 2025, Issue 1, 2025.The traditional A ∗ algorithm has problems such as low search speed and huge expansion nodes, resulting in low algorithm efficiency. This article proposes a circular arc distance calculation method in the heuristic function, which combines the Euclidean distance and the Manhattan distance as radius, uses a deviation distance as the correction, and ...
Yuandong Chen +6 more
wiley +1 more source