Journal ArticleDOI
Protecting Signal Integrity Against Atomic Clock Anomalies on Board GNSS Satellites
TLDR
Results show that the method introduced could be a suitable method to detect GNSS clock events and some results obtained by monitoring actual GNSS satellite clocks are presented.Abstract:
This paper introduces a method of detecting atomic clock anomalies for Global Navigation Satellites System (GNSS) satellites in real-time mode and presents some results obtained by monitoring actual GNSS satellite clocks. The method employs a Kalman filter formulation which facilitates the real-time processing of GNSS carrier-phase measurements. Judgment regarding clock anomalies is made using the prediction interval approach and actual distribution of predicted phase and frequency error is replaced by overbounding Gaussian distribution. Results show that the method could be a suitable method to detect GNSS clock events.read more
Citations
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Journal ArticleDOI
Atomic clock performance and combined clock error prediction for the new generation of BeiDou navigation satellites
TL;DR: The results illustrate that gross error can be eliminated effectively and that the performances of the new generation of satellites are improved in comparison with those of regional satellites.
Journal ArticleDOI
Detection of weak frequency jumps for GNSS onboard clocks
Xinming Huang,Hang Gong,Gang Ou +2 more
TL;DR: The detection method proposed is helpful for autonomous integrity monitoring of GNSS satellite clocks, and can also be applied to other frequency anomalies with an appropriately modified detector.
Journal ArticleDOI
High-Rate Monitoring of Satellite Clocks Using Two Methods of Averaging Time
Kamil Maciuk,Paulina Lewińska +1 more
TL;DR: The authors show the characterisation of the atomic GNSS clock’s stability and its dependency on the adopted orbit type using Allan deviation with two methods of averaging time.
Journal ArticleDOI
Optimal Observation Intervals for Clock Prediction Based on the Mathematical Model Method
TL;DR: The optimal observation intervals for the prediction of cesium and hydrogen maser atomic clocks are derived based on the mathematical model method and are supported by numerical simulations and experimental measurements.
Journal ArticleDOI
Detection of weak frequency anomalies for atomic clocks with a Kalman filter
TL;DR: In this paper, a modification to the original frequency jump detector algorithm is suggested by the addition of a noise-removal filter, and the performance is then compared with the original algorithm and improvement is shown.
References
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Book
Applied Optimal Estimation
TL;DR: This is the first book on the optimal estimation that places its major emphasis on practical applications, treating the subject more from an engineering than a mathematical orientation, and the theory and practice of optimal estimation is presented.
Journal ArticleDOI
Time and Frequency (Time-Domain) Characterization, Estimation, and Prediction of Precision Clocks and Oscillators
TL;DR: A tutorial review of some time-domain methods of characterizing the performance of precision clocks and oscillators is presented, and both the systematic and random deviations are considered.
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Predictive Inference: An Introduction
TL;DR: Non-Bayesian predictive approaches for Bayesian prediction of process control and optimization and Multivariate normal prediction problems.
Book
Characterization of Frequency Stability
J.A. Barnes,Andrew R. Chi,Leonard S. Cutler,Daniel J. Healey,D. B. Leeson,Thomas E. McGunigal,James A. Mullen,Warren L. Smith,Richard L. Sydnor,R. F. C. Vessot,Gernot M. R. Winkler +10 more
TL;DR: In this article, the spectral density S y (f) of the function y(t) where the spectrum is considered to be one-sided on a per hertz basis is defined.