Results 21 to 30 of about 10,960 (257)
Navigation, 2023 The extent to which navigation signals in the E6 band may be impacted by shared spectrum allocations might be underappreciated. This paper presents top-level observations from a multi-year international radio frequency interference (RFI) monitoring ...
Aiden Morrison +5 more
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Radio Direction Finding in Air Traffic Services
Promet (Zagreb), 2005 The paper analyses the Radio Direction Finding principlefor navigation and swveillance system. Radio Direction Findinginvolves locating the bearing of a transmitter called a radiobeacon.
Andrej Novak
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Bat target tracking strategies for prey interception
Communicative & Integrative Biology, 2021 Insectivorous bats capture their prey in flight with impressive success. They rely on the echoes of their own ultrasonic vocalization that yield acoustic snapshots, which enable target tracking on a rapid time scale.
Angeles Salles +2 more
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Optimal Trajectories for Homing Navigation with Bearing Measurements
IFAC Proceedings Volumes, 2008 In this paper we examine the geometry of a number of navigation schemes for guiding a pursuer from a fixed initial position to a final target position. We explicitly characterize the optimal pursuer trajectories for the given problems in terms of minimizing the error in an unbiased estimate of the target position from successive bearing measurements ...
Adrian N. Bishop, Pubudu N. Pathirana
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Observability-enhanced proportional navigation guidance with bearings-only measurements [PDF]
The Journal of the Australian Mathematical Society. Series B. Applied Mathematics, 1999 AbstractWe analyse the performance of the additive observable proportional navigation guidance system, which is well-suited for low-cost homing missiles with bearings-only measurements. Closed-form solutions are derived for both manoeuvring and non-manoeuvring targets.
Li, M. Y., Lim, C. C.
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Characterizing an Air-Bearing Testbed for Simulating Spacecraft Dynamics and Control
Aerospace, 2022 Ground-based testbeds play a critical role in developing and testing different methods of spacecraft dynamics and control. To find the dynamic behavior in such an air-bearing testbed, a detailed characterization of the testbed must be provided via ...
Zheng Huang +4 more
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Frontiers in Materials, 2019 G95Cr18 stainless bearing steel is used to manufacture rolling bearings widely used in aviation and navigation fields. Twin carbide structure often appears in G95Cr18 stainless bearing steel structure and affects its material properties.
Hao Guo +6 more
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A novel Technique for Improving the Angular Accuracy of Doppler VOR Receivers [PDF]
Advances in Radio Science, 2021 Doppler VOR (D-VOR) transmitters are used as navigation aids in aviation. They transmit an omnidirectional phase reference in an amplitude-modulated (AM) sideband and directional phase information on a frequency-modulated (FM) subcarrier.
K. Schubert, J. Werner, J. Wellhausen
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Dynamic knee alignment and collateral knee laxity and its variations in normal humans
Frontiers in Surgery, 2015 Alignment of normal, arthritic and replaced human knees is a much debated subject as is the collateral ligamentous laxity. Traditional quantitative values have been challenged. Methods used to measure these are also not without flaws.
Kamal eDeep +2 more
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Modern Solar Navigation Techniques
Groundings, 2023 Navigation by sea has proven difficult due to the absence of distinct markers for guidance. One solution for longer journeys was to track the position of celestial bodies as a navigational method, which has become more reliable as mathematical models ...
Alberto Bodas Gallego
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