Results 191 to 200 of about 8,653 (226)

A Study of Outliers in GNSS Clock Products. [PDF]

Sensors (Basel)
Maciuk K, Varna I, Krzykowska-Piotrowska K.   +2 more
europepmc   +1 more source

Grey modelling and real-time forecasting for the approximate non-homogeneous white exponential law BDS clock bias sequences. [PDF]

Sci Rep
Tan X, Xu J, Li F, Wu M, Liang Y, Chen D, Zhu B.   +6 more
europepmc   +1 more source

Detecting and Mitigating Attacks on GPS Devices. [PDF]

Sensors (Basel)
Burbank J, Greene T, Kaabouch N.
europepmc   +1 more source

Combining semiparametric and machine learning approaches for short-term prediction of satellite clock bias. [PDF]

Sci Rep
Jin L, Zhao W, Pan X, Ai Q, Cai M, Ruan X.   +5 more
europepmc   +1 more source

A Two-Step Regional Ionospheric Modeling Approach for PPP-RTK. [PDF]

Sensors (Basel)
Xu Z, Cai C, Pan L, Dai W, He B.
europepmc   +1 more source

Optimal design of broadcast ephemeris parameters for a navigation satellite system

GPS Solutions, 2011
Computation of broadcast ephemerides is a fundamental task in satellite navigation and positioning. The GPS constellation is composed of medium-earth-orbit (MEO) satellites, and therefore can employ a uniform parameter set to produce broadcast ephemerides.
Xiaofeng Fu, Meiping Wu
openalex   +3 more sources

Autonomous broadcast ephemeris improvement for GNSS using inter-satellite ranging measurements

Advances in Space Research, 2012
Abstract This paper discusses the concept of using inter-satellite ranging (ISR) measurements of the satellites of a Global Navigation Satellite System (GNSS) for autonomous broadcast ephemeris improvement. Firstly the inter-satellite ranging is modeled to obtain the clock and orbit error observables.
Hongliang Xu, Jinling Wang, Xingqun Zhan
openalex   +3 more sources

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A broadcast ephemeris design of LEO navigation augmentation satellites based on the integration-type ephemeris model

Measurement Science and Technology, 2021
Abstract Low Earth orbit (LEO) satellites are a promising type of navigation augmentation satellite for current global navigation satellite systems. Aiming at the navigation function, an effective broadcast ephemeris model needs to be designed for LEO satellites.
Junping Chen, Yize Zhang, Lingdong Meng, Lingdong Meng, Jiexian Wang   +4 more
openaire   +2 more sources

Broadcast Ephemeris Accuracy Analysis for GPS Based on Precise Ephemeris

Applied Mechanics and Materials, 2014
The accuracy of broadcast ephemeris is an important index of a satellite navigation system. The theory and method of precise ephemeris assessing broadcast ephemeris are introduced. The accuracy of GPS satellite broadcast ephemeris is assessed with the precise ones provided by IGS.
Dong Yang Jin, Chang Feng Xia, Rui Xi Jia, Xiao Yu Li   +3 more
openaire   +2 more sources