Results 21 to 30 of about 721,734 (114)

A Novel Downward‐Looking Linear Array SAR Imaging Method Based on Multiple Measurement Vector Model with L2,1‐Norm

Journal of Sensors, Volume 2021, Issue 1, 2021., 2021
Downward‐looking linear array synthetic aperture radar (DLLA SAR) is a kind of three‐dimensional (3‐D) radar imaging system. To obtain the superresolution along the crosstrack direction of DLLA SAR, the sparse regularization models with single measurement vector (SMV) have been widely applied. However, the robustness of the sparse regularization models
Le Kang, Tian-chi Sun, Jia-cheng Ni, Qun Zhang, Ying Luo, Biswajeet Pradhan   +5 more
wiley   +1 more source

CLEAN technique in strip-map SAR for high-quality imaging [PDF]

, 2009
The maximum obtainable resolution of a strip-map synthetic aperture radar (SAR) system can be retained by simply avoiding weighting, or tapering, data samples in the along-track compression process.
Michele Galletti, Galletti, Michele, Ghaemi, Hirad, Frank Gekat, Gekat, Frank, Börner, Thomas, Mats Viberg, Thomas Boerner, Viberg, Mats, Hirad Ghaemi   +9 more
core   +1 more source

An Improved H/ $\alpha$ Unsupervised Classification Method for Circular PolSAR Images

IEEE Access, 2018
In conventional polarimetric synthetic aperture radar, targets are usually assumed isotropic, and potential polarimetric variations in azimuth are ignored.
Feiteng Xue, Yun Lin, Wen Hong, Shiqiang Chen, Wenjie Shen   +4 more
doaj   +1 more source

A Focusing Algorithm for Circular SAR Based on Phase Error Estimation in Image Domain

Leida xuebao, 2015
Residual motion error is common in high-resolution circular Synthetic Aperture Radar (SAR) image defocusing. The Signal-to-Clutter Ratio (SCR) in echo data domain is relatively low; thus, the phase error spans several range bins.
Guo Zhen-yu, Lin Yun, Hong Wen
doaj   +1 more source

Assessment of Pharmaceutical Protein–Ligand Pose and Affinity Predictions in CASP16

Proteins: Structure, Function, and Bioinformatics, Volume 94, Issue 1, Page 249-266, January 2026.
ABSTRACT The protein–ligand component of the 16th Critical Assessment of Structure Prediction (CASP16) challenged participants to predict both binding poses and affinities of small molecules to protein targets, with a focus on drug‐like compounds from pharmaceutical discovery projects. Thirty research groups submitted predictions for 229 protein–ligand
Michael K. Gilson, Jerome Eberhardt, Peter Škrinjar, Janani Durairaj, Xavier Robin, Andriy Kryshtafovych   +5 more
wiley   +1 more source

High‐Fidelity 3D Reconstruction From Sparse Multi‐Baseline CSAR Data via Conditional Diffusion Models

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This work proposes a conditional diffusion model framework for high‐fidelity 3D reconstruction from sparse multibaseline circular synthetic aperture radar (CSAR) data, addressing challenges of low vertical resolution, geometric blur and artefacts. The method integrates a dual‐path 3D U‐Net with cross‐attention to fuse coarse reconstruction features ...
Xingyu Zhao, Yanheng Ma, Bingxuan Li, Lina Chu, Wei Li   +4 more
wiley   +1 more source

Elevation Information Extraction Scheme Based on Sub‐Aperture Correlation Using Airborne Circular Synthetic Aperture Radar Imaging

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
The traditional elevation information extraction methods have issues such as limited precision of the elevation extraction and complex processing flow. Thus, an elevation information extraction scheme based on the sub‐aperture correlation using airborne CSAR imaging is proposed.
Hongtu Xie, Qi Peng, Yangyang Xiao, Nannan Zhu   +3 more
wiley   +1 more source

Polar format algorithm of synthetic aperture radar imaging on spiral trajectory

The Journal of Engineering, Volume 2019, Issue 19, Page 5580-5583, October 2019., 2019
A novel polar format algorithm is proposed for spiral trajectory. The synthetic aperture radar (SAR) signal model of spiral trajectory platform is firstly established, then the sector‐by‐sector phase compensation method of spiral trajectory SAR is proposed.
Feng Li, Wengu Yang, Zhou Wang, Di Yao
wiley   +1 more source

High‐Precision Airborne Circular SAR Imaging Method Based on Sub‐Aperture Autofocusing Combined With Terrain Undulation Error Compensation

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
Airborne circular synthetic aperture radar (CSAR) has the ability of multiangle observation and high‐resolution imaging in remote sensing applications, but its imaging performance is often degraded by the platform motion error and terrain undulation error.
Hongtu Xie, Qi Peng, Yangyang Xiao, Nannan Zhu   +3 more
wiley   +1 more source

Magnitude of Respiratory Problems of Adults in a Community of Bangladesh: A Cross‐Sectional Study

Advances in Public Health, Volume 2026, Issue 1, 2026.
Background and Aims Respiratory diseases contribute significantly to morbidity and mortality rates in Bangladesh, especially in urban areas. This study aimed to estimate the prevalence of respiratory symptoms and identify the key risk factors associated with respiratory problems among adults in a community in Kaliakair, Gazipur, Bangladesh.
Mohammed Atiqur Rahman, Shamim Ahmed, Shuvo Majumder, Manal Mizanur Rahman, Susanta Kumar Paul, Kazi Rahila Ferdousi, Shah Ashiqur Rahman Ashiq Choudhury, Md. Hamza, Md. Abu Rayhan, Samia Rahman, Samprity Islam, Rajashish Chakrabortty, Hannah Wesley   +12 more
wiley   +1 more source