Results 21 to 30 of about 19,851 (292)
Doppler Positioning Performance of LEO Mega Constellation
天地一体化信息网络This paper proposed a Doppler-only point-solution algorithm and analyzed the Doppler positioning performance based on the Starlink constellation.The Doppler positioning accuracy was about 3～6 m.To achieve the meter-level positioning accuracy, the ...
Yulu ZHANG +3 more
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An Image Compensation-Based Range–Doppler Model for SAR High-Precision Positioning
Applied SciencesThe range–Doppler (R–D) model is extensively employed for the geometric processing of synthetic aperture radar (SAR) images. Refining the sensor motion state and imaging parameters is the most common method for achieving high-precision geometric ...
Kexin Cheng, Youqiang Dong
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DronesIn the autonomous navigation of drones, improving positioning accuracy is of significant importance to obtain highly accurate information on flight velocity.
Lanjian Chen +3 more
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Instantaneous velocity determination and positioning using Doppler shift from a LEO constellation
Satellite Navigation, 2023 To provide backup and supplementation for the Global Navigation Satellite System (GNSS), Doppler shift from Low Earth Orbit (LEO) satellites can be used as signals of opportunity to provide positioning, navigation, and timing service.
Fei Guo +5 more
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Results in Physics, 2020 With the wide civil applications of low-cost Global Navigation Satellite System (GNSS) receiver, precise positioning based on low-cost receiver attracted extensive attention.
Houxiang Zhou +5 more
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Applied Sciences, 2021 This work proposes a proof-of-concept ultrasound blood-flow-monitoring circuit system using a single-element transducer. The circuit system consists of a single-element ultrasonic transducer, an analog interface circuit, and a field-programmable gate ...
Hyun-Tae Park, Ji-Yong Um
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4D RADAR/IMU/GNSS INTEGRATED POSITIONING AND MAPPING FOR LARGE-SCALE ENVIRONMENTS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023 4D millimeter-wave radar can work in harsh weather conditions such as fog and snow, and measure the position and radial Doppler velocity of objects in three-dimensional space. Some existing methods perform positioning by fusing 3D velocity or point cloud
B. Wang, Y. Zhuang, N. El-Bendary
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Position of first Doppler peak [PDF]
Second international workshop on particle physics and the early universe (COSMO-98), 1999 This talk describes an analytic calculation of the position of the first accoustic peak as a function of the matter density and the cosmological constant (work with Y.J. Ng and R. Rohm), agreeing with independent numerical studies. There is also discussion of supernovae observations and how together these approaches combine to suggest non-zero ...
openaire +2 more sources
Research on Error Correction Technology in Underwater SINS/DVL Integrated Positioning and Navigation
, 2023 Underwater vehicles are key carriers for underwater inspection and operation tasks, and the successful implementation of these tasks depends on the positioning and navigation equipment with corresponding accuracy.
Zhen Zhang +5 more
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Practical Use of Starlink Downlink Tones for Positioning
, 2023 The large availability of Low Earth Orbit (LEO) satellite systems makes them useful beyond their original purposes, such as in positioning, where their signals can be passively used.
Nabil Jardak, Ronan Adam
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