Results 1 to 10 of about 12,671 (69)

Analysis Method for Determining Optimal Synthetic Aperture Time Using Estimated Range and Doppler Cone Angle at the Center of Synthetic Aperture Length [PDF]

Journal of Electromagnetic Engineering and Science, 2023
Synthetic aperture time (SAT) is a crucial component for acquiring high-quality synthetic aperture radar images with an excellent target cross-range resolution.
Min-Ji Kim, Sangho Lim, Dong-Cho Shin
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Uncertainty Estimation for Deep Learning-Based Segmentation of Roads in Synthetic Aperture Radar Imagery

Remote Sensing, 2021
Mission-critical applications that rely on deep learning (DL) for automation suffer because DL models struggle to provide reliable indicators of failure.
Jarrod Haas, Bernhard Rabus
doaj   +1 more source

Polarization-Insensitive, Orthogonal Linearly Polarized and Orthogonal Circularly Polarized Synthetic Aperture Metalenses

Photonics, 2023
Metalenses have attracted much attention from researchers because they are thin, multifunctional and easy to integrate. However, due to the limitation of fabrication techniques and the influence of working wavelength, it is difficult to realize a large ...
Jijian Hu, Zhenghong Dong, Xuanwen Yang, Lurui Xia, Xueqi Chen, Yan Lu   +5 more
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Design of athermalized mounting structure for the sub-aperture primary mirror of a synthetic aperture telescope

Advances in Mechanical Engineering, 2022
The imaging quality of the synthetic aperture system is sensitive to the positioning accuracy of the sub-aperture primary mirror. A novel flexible mounting structure of bimetallic material is proposed for the athermalization of the sub-aperture primary ...
Yunfeng Li, Zongxuan Li, Qiang Yong, Tiancong Wang, Defu Zhang   +4 more
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AUGMENTING THE PHILIPPINES’ DOST-ASTI’S POTENTIAL FLOOD EXTENTS MAPPING SERVICE WITH S-BAND NOVASAR-1 IMAGES [PDF]

The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences
The Philippines’ Advanced Science and Technology Institute under the Department of Science and Technology (DOST-ASTI) has developed an AI-based and near real-time flood extent mapping service that utilizes C-Band Sentinel-1 SAR images.
J. B. L. C. Dumalag, J. B. L. C. Dumalag, K. L. S. Mariano, K. L. S. Mariano, N. R. Cadiz, N. R. Cadiz, A. E. Retamar, A. E. Retamar, J. C. Aceron, J. C. Aceron, M. M. Felicen, M. M. Felicen, M. C. Gelido, M. C. Gelido   +13 more
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Research on frequency domain synthetic aperture focusing pipeline guided wave imaging based on phase migration

AIP Advances, 2021
In order to overcome the limitations of traditional ultrasonic imaging methods, which cannot directly give the imaging results of defects in a pipeline and have low imaging quality, a frequency domain synthetic aperture focusing pipeline imaging method ...
Wenwu Deng, Shengrong Long, Xuanyu Chen, Zhinong Li, Qiufeng Li   +4 more
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TerraSAR-X Time Series Fill a Gap in Spaceborne Snowmelt Monitoring of Small Arctic Catchments—A Case Study on Qikiqtaruk (Herschel Island), Canada

Remote Sensing, 2018
The timing of snowmelt is an important turning point in the seasonal cycle of small Arctic catchments. The TerraSAR-X (TSX) satellite mission is a synthetic aperture radar system (SAR) with high potential to measure the high spatiotemporal variability of
Samuel Stettner, Hugues Lantuit, Birgit Heim, Jayson Eppler, Achim Roth, Annett Bartsch, Bernhard Rabus   +6 more
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Ultrasonic Synthetic Apertures: Review

Archives of Acoustics, 2014
In the paper the concept of synthetic aperture used for high resolution/high frame rate ultrasonic imaging is reviewed. The synthetic aperture technique allows building extended “virtual” apertures, synthesized from smaller real aperture resulting in ...
Andrzej NOWICKI, Barbara GAMBIN
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Synthetic aperture-based linear-array photoacoustic tomography considering the aperture orientation effect [PDF]

Journal of Innovative Optical Health Sciences, 2018
The synthetic aperture-based linear-array photoacoustic tomography (PAT) was proposed to address the limited-view shortcomings of the single aperture, but the detection field of view (FOV) determined by the aperture orientation effect was not fully ...
Xiangwei Lin, Jaesok Yu, Naizhang Feng, Mingjian Sun   +3 more
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Doppler Factor in the Omega-k Algorithm for Pulsed and Continuous Wave Synthetic Aperture Radar Raw Data Processing

Applied Sciences, 2023
Synthetic aperture radar (SAR) raw data do not have a direct application; therefore, SAR raw signal processing algorithms are used to generate images that are used for various required applications.
Jhohan Jancco-Chara, Facundo Palomino-Quispe, Roger Jesus Coaquira-Castillo, Julio Cesar Herrera-Levano, Ruben Florez   +4 more
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