Open Access
Inertial navigation
M. M. Kuritsky,M. S. Goldstein,I. A. Greenwood,H. Lerman,J. E. McCarthy,T. Shanahan,M. Silver,J. H. Simpson +7 more
TLDR
An overview of inertial navigation is provided, followed by several sections detailing a specific, but different mechanization approach, and two gyroscopic approaches, presently in development are finally discussed.Citations
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Journal ArticleDOI
In-Car Positioning and Navigation Technologies—A Survey
Isaac Skog,Peter Händel +1 more
TL;DR: A survey of the information sources and information fusion technologies used in current in-car navigation systems is presented and the pros and cons of the four commonly used information sources are described.
Patent
Vehicle position determination system and method
James W. Sennott,Christos T Kyrtsos,Adam J. Gudat,Dana A. Christensen,Douglas W Friedrich,Darrell E. Stafford +5 more
TL;DR: In this article, the first and second position estimates are combined and filtered using novel techniques to derive a more accurate third position estimate of the vehicle's position, which can be used for autonomous navigation.
Patent
Integrated vehicle positioning and navigation system, apparatus and method
Walter J. Bradbury,Dana A. Christensen,Richard G. Clow,Lonnie J. Devier,Douglas W Friedrich,Adam J. Gudat,Carl A. Kemner,Karl W. Kleimenhagen,Craig L. Koehrsen,Christos T Kyrtsos,Norman K Lay,Joel L. Peterson,Prithvi N. Rao,Larry E. Schmidt,James W. Sennott,Garry K. Shaffer,Wenfan Shi,Dong Hun Shin,Sanjiv Singh,Darrell E. Stafford,Louis J. Weinbeck,Jay H. West,William Whittaker,Baoxin Wu +23 more
TL;DR: In this article, a first position estimate (112) of the vehicle (102,310) is derived from satellites (132-170,200-206) of a global positioning system (100A) and/or a pseudolite(s) (105).
Journal ArticleDOI
Atomic Sensors – A Review
TL;DR: In this article, the basic physics and instrumentation issues related to high-performance physical and inertial sensors based on atomic spectroscopy are discussed, with a focus on precision sensing of electromagnetic and gravitational fields.
Patent
System and method for providing accurate vehicle positioning using spatial bias techniques
Christos T Kyrtsos,Adam J. Gudat,Dana A. Christensen,Douglas W Friedrich,Darrell E. Stafford +4 more
TL;DR: In this article, a vehicle position determination system and method provide accurate vehicle positioning using a global positioning system using Spatial bias techniques are used to improve positioning accuracy while the vehicle is in the midst of a relatively linear path and is not approaching a drastically nonlinear path.
References
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Journal ArticleDOI
Limitation of rotation sensing by scattering.
TL;DR: It is shown that one source of limitation, namely, the superposition of a nonreciprocal pair of waves generated by backward scattering from the incident waves, can result in significant error but can be mitigated by appropriate system design and signal modulation.
Journal ArticleDOI
Fiber-ring interferometer: polarization analysis.
Reinhard Dr Ulrich,Mark Johnson +1 more
TL;DR: In a rotation-sensing fiber-optical Sagnac interferometer, temperature fluctuations and mechanical vibrations affect the birefringence of the fiber and may cause phase shifts like those resulting from rotation.
Journal ArticleDOI
Polarization control in optical-fiber gyroscopes.
TL;DR: It is shown that the maximum drift rate that is due to faulty polarization control is proportional to the amplitude-extinction ratio for the rejected polarization channel, and in the worst circumstances, the intensity extinction in a typical fiber gyroscope must approach 10(-6).
Journal ArticleDOI
Compensation of the optical Kerr effect in fiber-optic gyroscopes.
TL;DR: The principle of a simple technique to reduce substantially the Kerr-induced rotation-rate error in fiber-optic gyroscopes consists of modulating the source intensity to adjust the nonlinear interaction between the counterpropagating waves.