Results 21 to 30 of about 432 (149)
A Flexible Ephemeris Representation for GNSS and Alternative PNT Signal Sources Using B-Splines
Navigation, 2023 Most global navigation satellite systems (GNSSs) ephemeris representations require straightforward, albeit specialized algorithms to compute the transmitter position at a time of interest.
Mikaela Dobbin, Penina Axelrad
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Navigation, 2023 The success of drone missions is incumbent on an accurate determination of the drone pose and velocity, which are collectively estimated by fusing inertial measurement unit and global navigation satellite system (GNSS) measurements.
Aman Sharma +2 more
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Spatiotemporal Deep Learning Network for High-Latitude Ionospheric Phase Scintillation Forecasting
Navigation, 2023 In this paper, we present a spatiotemporal deep learning (STDL) network to conduct binary phase scintillation forecasting at a high-latitude global navigation satellite systems (GNSS) station.
Yunxiang Liu +3 more
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Navigator Notes: Editorial Highlights from the Editor-in-Chief
Navigation, 2022 Welcome to the Fall 2022 issue of NAVIGATION. In this issue, we again feature articles on a wide range of topics including the instrumentation group delays of BeiDou satellites, the gain patterns of GPS satellite antennas, time transfer for a lunar ...
Richard B. Langley
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Stochastic Reachability-Based GPS Spoofing Detection with Chimera Signal Enhancement
Navigation, 2023 To protect civilian global positioning system (GPS) users from spoofing attacks, the U.S. Air Force Research Lab has proposed the chips-message robust authentication (Chimera) enhancement for the L1C signal. In particular, the Chimera fast channel allows
Tara Mina +3 more
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Navigation, 2022 Extended Kalman filters (EKFs) that monitor innovations over time have been demonstrated to be effective at detecting slowly accumulating measurement faults (Quartararo & Langel, 2020; Tanil et al., 2018).
John D. Quartararo, Steven E. Langel
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A Flexible GNSS Spoofer Localization System: Spoofing Discrimination and Localization Method
Navigation, 2022 Global navigation satellite systems (GNSS) are vulnerable to spoofing attacks. To shut down a spoofer, it is necessary to locate the spoofer first. Many spoofer localization systems use long cables for the synchronization of multiple receivers.
Jian Wen, Hong Li, Mingquan Lu
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Navigation, 2022 Ultrawideband (UWB) technology has received considerable attention in indoor positioning because of its high ranging accuracy. However, UWB range measurements can be contaminated by the delayed signals resulting from obstruction and reflection in ...
Ning Zhou +3 more
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High-Accuracy Static Baseline Estimation using NavIC L5 Observables
Navigation, 2022 The estimation of static baselines using NavIC L5 double-differenced (DD) pseudoranges and carrier phases is investigated. We estimate the baseline with increasing accuracy by using the DD pseudoranges, smoothing the DD pseudoranges with the DD carrier ...
A. Althaf, H.B. Hablani
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Integrity of Visual Navigation—Developments, Challenges, and Prospects
Navigation, 2022 Camera-based visual navigation has great potential for various applications, especially in satellite-signal-degenerated environments. However, the lack of integrity protection has constrained its utilization in safety-critical applications.
Chen Zhu +2 more
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