Results 21 to 30 of about 4,631,130 (249)

A Novel Sub-Bottom Profiler and Signal Processor

open access: yesSensors, 2019
In this paper, we introduce a novel sub-bottom profiler, making good use of the Mills cross configuration of multibeam sonar and synthetic aperture techniques of the synthetic aperture sonar system.
Cheng Tan   +3 more
doaj   +1 more source

End-to-End SAR Deep Learning Imaging Method Based on Sparse Optimization

open access: yesRemote Sensing, 2021
Synthetic aperture radar (SAR) imaging has developed rapidly in recent years. Although the traditional sparse optimization imaging algorithm has achieved effective results, its shortcomings are slow imaging speed, large number of parameters, and high ...
Siyuan Zhao   +4 more
doaj   +1 more source

Imaging algorithm for multi-channel scan synthetic aperture radar with channel error estimation and compensation

open access: yesThe Journal of Engineering, 2019
The wide swath synthetic aperture radar (SAR) imaging with a fine resolution is fundamentally a contradiction in conventional SAR imaging. To meet the demand of high-resolution width swath (HRWS) imaging, multi-channel scan mode has received a great deal
Feng Xiao, Zegang Ding, Meng Ke
doaj   +1 more source

FDBP-InSAR: An Efficient Algorithm for InSAR Imaging via Frequency Domain Back Projection

open access: yesRemote Sensing, 2020
High-quality focusing with accurate phase-preserving is a significant and challenging step in interferometric synthetic aperture radar (InSAR) imaging.
Shunjun Wei   +5 more
doaj   +1 more source

IMAGING ALGORITHMS FOR OCCLUSIVE CAROTID DISEASE IN TREATMENT STRATEGY

open access: yesВестник рентгенологии и радиологии, 2017
Objective – to optimize imaging algorithms of preoperative evaluation and postoperative changes and complications in patients with occlusive carotid disease.Material and methods.
M. V. Vishnyakova
doaj   +1 more source

Spaceborne Azimuth Multichannel BiSAR With Geosynchronous Transmitter and LEO Receiver: High-Resolution Wide-Swath Image Formation

open access: yesIEEE Access, 2019
Spaceborne azimuth multichannel bistatic synthetic aperture radar (AMC-BiSAR) system employed inclined geosynchronous (GEO) transmitter and low-Earth-orbit (LEO) receiver is capable of providing a vast area of surveillance and fine spatial resolution ...
Yuekun Wang, Zheng Lu
doaj   +1 more source

Monopulse forward-looking imaging algorithm based on Levenberg–Marquardt optimisation

open access: yesThe Journal of Engineering, 2019
With precise angle measurement, traditional monopulse techniques for forward-looking imaging can acquire exact angle information of one single target within a radar beam. However, when multiple targets exist in a beam, it is difficult to resolve them. To
Tao Zhou   +4 more
doaj   +1 more source

A Fast 3D Near Range Imaging Algorithm for a Scanning Sparse MIMO Array in the Millimeter Band. [PDF]

open access: yesSensors (Basel), 2020
Millimeter-wave technology has been widely used in near range targets imaging scenarios, such as mechanical scanning and multiple input multiple output (MIMO) array imaging.
Wang F, Deng B, Yang Q, Wang H, Zhang Y.
europepmc   +2 more sources

Azimuth-Invariant Motion Compensation and Imaging Chirp Scaling Algorithm for Multiple-Receiver Synthetic Aperture Sonar

open access: yesIEEE Access, 2022
To improve the imaging quality of conventional imaging algorithms without motion compensation (MOCO) and the efficiency of point-by-point MOCO algorithms for multiple-receiver synthetic aperture sonar (SAS) with azimuth-invariant six-degree of freedom ...
Zhen Tian   +3 more
doaj   +1 more source

Application of Imaging Algorithms for Gas–Water Two-Phase Array Fiber Holdup Meters in Horizontal Wells

open access: yesSensors
The flow dynamics of low-yield horizontal wells demonstrate considerable complexity and unpredictability, chiefly attributable to the structural attributes of the wellbore and the interplay of gas–water two-phase flow.
Ao Li   +8 more
doaj   +1 more source

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