Results 71 to 80 of about 19,527 (219)

PolSAR Image Modulation Using a Flexible Metasurface with Independently Controllable Polarizations

Remote Sensing
Recent advances in time-modulated metasurfaces (TMMs) have introduced approaches for controlling target features in radar imaging. These technologies enable dynamic reconstruction of scattering center locations and intensities by flexibly manipulating ...
Yuehan Wu, Junjie Wang, Jiong Wu, Guang Sun, Dejun Feng   +4 more
doaj   +1 more source

Simulation of polarimetric radar variables in rain at S-, C- and X-band wavelengths [PDF]

Advances in Geosciences, 2008
Polarimetric radar variables of rainfall events, like differential reflectivity <i>Z</i>_DR, or specific differential phase <i>K</i>_DP, are better suited for estimating rain rate <i ...
F. Teschl, W. L. Randeu, M. Schönhuber, R. Teschl   +3 more
doaj  

A framework of rapid regional tsunami damage recognition from post-event TerraSAR-X imagery using deep neural networks [PDF]

, 2018
Near real-time building damage mapping is an indispensable prerequisite for governments to make decisions for disaster relief. With high-resolution synthetic aperture radar (SAR) systems, such as TerraSAR-X, the provision of such products in a fast and ...
Adriano, Bruno, Bai, Yanbing, Gao, Chang, Koch, Magaly, Koshimura, Shunichi, Mas, Erick, Singh, Sameer   +6 more
core   +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

Classification of Biological Scatters Using Polarimetric Weather Radar

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Weather radar holds the capability to monitor the extensive migration of bird and insect species. In particular, polarimetric weather radar can enhance aerial ecological monitoring by quantifying target shape through the measurement of polarization ...
Cheng Hu, Zhuoran Sun, Kai Cui, Huafeng Mao, Rui Wang, Xiao Kou, Dongli Wu, Fan Xia   +7 more
doaj   +1 more source

Sensitivities of Quantitative Precipitation Forecasts for Typhoon Soudelor (2015) near Landfall to Polarimetric Radar Data Assimilation

Remote Sensing, 2020
Based on the preciousness and uniqueness of polarimetric radar observations collected near the landfall of Typhoon Soudelor (2015), this study investigates the sensitivities of very short-range quantitative precipitation forecasts (QPFs) for this typhoon
Chih-Chien Tsai, Kao-Shen Chung
doaj   +1 more source

The optimal polarizations for achieving maximum contrast in radar images [PDF]

There is considerable interest in determining the optimal polarizations that maximize contrast between two scattering classes in polarimetric radar images.
Kong, J. A., Novak, L. M., Shin, R. T., Swartz, A. A., Yueh, H. A.   +4 more
core   +1 more source

Copolar Calibration of Multistatic Radar in the Presence of Multipath [PDF]

, 2016
This paper addresses the Polarimetrie calibration of the nodes of a multistatic radar system, by using a reference object with known scattering matrix, such as a metallic sphere.
Fioranelli, Francesco, Gini, Fulvio, Greco, Maria, Griffiths, Hugh, Palamà, Riccardo, Ritchie, Matthew   +5 more
core   +3 more sources

Learning to Optimise FISTA‐PnP for Sparse Radar Imaging

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
This work presents a plug‐and‐play (PnP) framework for sparse radar imaging that combines FISTA with reinforcement learning (RL)‐based parameter adaptation, achieving faster convergence and eliminating manual parameter tuning. Extensive experiments show the framework outperforms classical methods and recent optimisation networks, providing high‐quality
Yao Zhao, Yuliang Zheng, Kuoye Han, Ye Tian, Bingo Wing–Kuen Ling, Zhe Zhang, Xiaoshuai Pei, Zhihong Zhang   +7 more
wiley   +1 more source

A Set of Point-Targets-Based Polarimetric Calibration Methods Based on General Polarimetric System Model

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
Freeman proposed a general polarimetric system model in 1991 for the characterization and calibration of fully polarimetric synthetic aperture radar (SAR) systems.
Weibin Liang
doaj   +1 more source