Results 1 to 10 of about 2,282,425 (108)

A Sub-Aperture Overlapping Imaging Method for Circular Synthetic Aperture Radar Carried by a Small Rotor Unmanned Aerial Vehicle [PDF]

open access: yesSensors, 2023
Circular synthetic aperture radar (CSAR) can obtain higher image resolution and more target information using 360° observation of the target. Due to the anisotropy of target scattering characteristics in the actual scene, the sub-aperture imaging method ...
Lina Chu   +5 more
doaj   +5 more sources

Improved Phase Gradient Autofocus Method for Multi-Baseline Circular Synthetic Aperture Radar Three-Dimensional Imaging

open access: yesRemote Sensing
Multi-baseline circular synthetic aperture radar (MB CSAR) can be applied to obtain a three-dimensional (3D) image of the observation scene. However, the phase error caused by radar platform motion or atmospheric propagation delay restricts its 3D ...
Shiliang Yi   +7 more
doaj   +4 more sources

High-Precision Imaging and Dense Vehicle Target Detection Method for Airborne Single-Pass Circular Synthetic Aperture Radar

open access: yesIEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Circular synthetic aperture radar (CSAR) has advantages of the omnidirectional detection and high-resolution imaging. However, when CSAR detects the dense target in the observation scene, the phenomena such as the layover effect in the CSAR image may ...
Haozong Liu   +4 more
doaj   +4 more sources

A Novel Detection Scheme in Image Domain for Multichannel Circular SAR Ground-Moving-Target Indication [PDF]

open access: yesSensors, 2022
Circular synthetic aperture radar (CSAR), which can observe the region of interest for a long time and from multiple angles, offers the opportunity for moving-target detection (MTD).
Qinghai Dong   +5 more
doaj   +2 more sources

Radar-Based Microwave Breast Imaging Using Neurocomputational Models [PDF]

open access: yesDiagnostics, 2023
In this study, neurocomputational models are proposed for the acquisition of radar-based microwave images of breast tumors using deep neural networks (DNNs) and convolutional neural networks (CNNs).
Mustafa Berkan Bicer
doaj   +2 more sources

A GAN-based fast focusing method for circular SAR images [PDF]

open access: yesHeliyon
Circular Synthetic Aperture Radar(CSAR) imaging is vulnerable to perturbations in the atmosphere and various other elements that can lead to position offset errors in the antenna's phase center as well as induce motion errors.
Bingxuan Li   +4 more
doaj   +2 more sources

Moving Target Indication for Dual-Channel Circular SAR/GMTI Systems [PDF]

open access: yesSensors, 2019
In a dual-channel circular synthetic aperture radar (CSAR) and ground moving target indication (GMTI) system, the antenna baseline is not parallel with the flight path due to a yaw angle.
Laihe Wang   +3 more
doaj   +2 more sources

Aspect Entropy Extraction Using Circular SAR Data and Scattering Anisotropy Analysis [PDF]

open access: yesSensors, 2019
In conventional synthetic aperture radar (SAR) working modes, targets are assumed isotropic because the viewing angle is small. However, most man-made targets are anisotropic.
Fei Teng, Wen Hong, Yun Lin
doaj   +2 more sources

Research on 4-D Imaging of Holographic SAR Differential Tomography

open access: yesRemote Sensing, 2023
Holographic synthetic aperture radar tomography (HoloSAR) combines circular synthetic aperture radar (CSAR) and SAR tomography (TomoSAR) to enable a 360° azimuth observation of the considered scene.
Shuang Jin   +5 more
doaj   +1 more source

Range-Doppler Based Moving Target Image Trace Analysis Method in Circular SAR

open access: yesRemote Sensing, 2023
The single channel Circular Synthetic Aperture Radar (CSAR) has the advantage of continuous surveillance of a fixed scene of interest, which can provide high frame rate image sequences to detect ground moving targets.
Wenjie Shen   +5 more
doaj   +1 more source

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