Results 81 to 90 of about 648,996 (229)

Wavelet-Based Compressed Sensing for SAR Tomography of Forested Areas [PDF]

, 2012
Synthetic aperture radar (SAR) tomography is a 3-D imaging modality that is commonly tackled by spectral estimation techniques. Thus, the backscattered power along the cross-range direction can be readily obtained by computing the Fourier spectrum of a ...
Nannini, Matteo, Aguilera, Esteban, Reigber, Andreas   +2 more
core   +1 more source

Surface Change Detection on Venus: An Inter‐Mission Comparison Framework Between Magellan and Future Radar Images

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract Detecting surface changes on Venus by comparing Magellan synthetic aperture radar (SAR) data with future high‐resolution data from Envision and VERITAS will be essential for constraining present‐day volcanism and characterizing planetary surface processes.
Yao Gao, Gerard Gallardo i Peres, Shubham Awasthi, Nikol Davidova, Richard Ghail, Philippa J. Mason   +5 more
wiley   +1 more source

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

On the statistics of differential phases in C-band weather radar [PDF]

Advances in Radio Science, 2007
Differential phases open a new parameter in polarimetric weather radar data analysis. In polarimetric <b>S</b>-matrices measured at the linear polarisation bases (vertical and horizontal) there exist basically three differential phases namely
T. Otto, M. Chandra
doaj  

Neural Network For Polarimetric Radar Target Classification

, 2006
Publication in the conference proceedings of EUSIPCO, Florence, Italy ...
BERIZZI, FABRIZIO, L. CANTINI, R. SOLETI, A. CAPRIA, D. CALUGI   +4 more
openaire   +4 more sources

Impact of Convective Intensity on Mixed‐Phase Evolution and Upper Positive Charge Region Formation in an Isolated Convective Cloud

Journal of Geophysical Research: Atmospheres, Volume 131, Issue 16, 28 August 2026.
Abstract Lightning initiation depends on the charge separation within the mixed‐phase areas of convective clouds, where graupel, ice, and supercooled water interact. However, the specific mixed‐phase structures that enhance charge separation remain unclear.
M. Kondo, T. Ushio
wiley   +1 more source

Towards Comprehensive Characterization of GaoFen-3: Polarimetric Radar Performance and Data Quality Assessment

Remote Sensing
Although synthetic aperture radar (SAR) performance and polarimetric data quality are closely related, they represent fundamentally different concepts.
Weibin Liang, Lihong Kang, Shijie Ren
doaj   +1 more source

Polarimetric Calibration of the GaoFen-3 Mission Using Active Radar Calibrators and the Applicable Conditions of System Model for Radar Polarimeters

Remote Sensing, 2019
GaoFen-3, the first polarimetric SAR satellite of China, carried out polarimetric calibration experiments using C-band polarimetric active radar calibrators (PARCs), trihedral corner reflectors (TCRs), and dihedral corner reflectors (DCRs).
Weibin Liang, Zengzeng Jia, Xiaolan Qiu, Jun Hong, Qingjun Zhang, Bin Lei, Fan Zhang, Zhaoguo Deng, Aichun Wang   +8 more
doaj   +1 more source

Advanced Polarimetric Doppler Weather Radar Simulator

, 2014
The Advanced Polarimetric Doppler Weather Radar Simulator (APDWRS) capable of generating I&Q time series voltages for a ground based fully-polarimetric Doppler weather radar is described in this paper. The Weather Research and Forecast (WRF) model is
Cuccoli, F., Facheris, L., Lischi, S., Baldini, L., Lupidi, A., Martorella, M.; id_orcid, Martorella Marco, Cuccoli, Fabrizio, Facheris, Luca, Baldini Luca, Facheris Luca, Lischi Stefano, Lupidi Alberto, Cuccoli Fabrizio   +13 more
core   +1 more source

Seasonal Reversal of Polarity Dominance in High‐Current Cloud‐to‐Ground Return Strokes Over East Asian Midlatitudes

Geophysical Research Letters, Volume 53, Issue 16, 28 August 2026.
Abstract Extreme positive cloud‐to‐ground lightning over East Asian midlatitudes exhibits a spring–autumn double maximum hidden by the familiar winter climatology. Using 1,838,538 return strokes with absolute peak currents at least 200 kA during 2006–2024, we resolve its annual cycle by month and latitude.
Nengxing Guo, Li Cai, Yu Feng, Wenzhao Lu, Yongxing Zeng, Yuheng Niu, Chun Zhao, Shanqiang Gu   +7 more
wiley   +1 more source