Results 81 to 90 of about 3,181,576 (160)

Radar Image Colorization: Converting Single-Polarization to Fully Polarimetric Using Deep Neural Networks

IEEE Access, 2018
Numerous radar polarimetry theories and polarimetric synthetic aperture radar (PolSAR) processing methods have been developed. However, the vast majority of SAR images are not fully polarimetric (full-pol).
Qian Song, Feng Xu, Ya-Qiu Jin
doaj   +1 more source

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

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

Variations of Microwave Scattering Properties by Seasonal Freeze/Thaw Transition in the Permafrost Active Layer Observed by ALOS PALSAR Polarimetric Data

Remote Sensing, 2015
Radar backscattering properties can be extremely sensitive to the freeze/thaw states of the ground surface. This study aims to evaluate the changes of L-band microwave scattering characteristics between thawed and frozen conditions by using polarimetric ...
Sang-Eun Park
doaj   +1 more source

Polarimetric Metagrating‐Assisted One‐Step Multi‐Dimensional Sensing Using a Vector Vortex Beam

Nanophotonics, Volume 15, Issue 16, 26 August 2026.
One‐step multidimensional sensing is realized by combining VVB probes with a polarimetric metagrating, where the full‐Stokes diffraction orders retrieve m‐dependent angular features and the polarization‐insensitive central order extracts l‐dependent radial‐intensity information. ABSTRACT Multidimensional optical sensing requires compact methods capable
Han Gao, Zhelei Chen, Kaihao Deng, MinJun Xie, Huanxin Liao, Zeyu Zheng, Hao Yang, ChunLian Zhan, Yanlong Meng, Bo Xiong, Wei Ma   +10 more
wiley   +1 more source

Insect monitoring without pitfalls: Seven steps for robust insect sensing systems

Approaches in Entomology: Methods, Philosophies, and Ethics, Volume 1, Issue 1, August‐December 2026.
Cameras, acoustics, radar and photonics allow us to observe insects at unprecedented spatial and temporal scales. Different sensors have unique strengths, while species ID is a critical bottleneck. Artificial intelligence (AI) and other processing tools should complement human workflows—not consume them. Expert annotation is more important than ever to
Jamie Alison, Luca Pegoraro, Jarrett Blair, Yuval Cohen, Birgen Haest, Jacob Idec, Jacob Kamminga, Jenna Lawson, Meng Li, Leandro Aparecido Do Nascimento, Charlotte L. Outhwaite, Benjamin Rutschmann, Maximilian Sittinger, Mariana Abarca, Tom August, Quentin Geissmann, Rob Guralnick, Guillaume Mougeot, Valentin Ștefan, Kim Bjerge, Mikkel Brydegaard, Toke Thomas Høye, Eva Knop, William Kunin, Moritz Lürig, David Roy, Asger Svenning, Roel van Klink   +27 more
wiley   +1 more source

Novel Scattering Power Decomposition Techniques for Full and Compact Polarimetric SAR Data

, 2016
In this poster we present novel scattering power decomposition techniques for full and compact polarimetric SAR data. • SDY4O Polarimetric SAR Decomposition • AG4U Polarimetric SAR Decomposition • New Compact Polarimetric SAR Decomposition (S-Ω ...
Debanshu Ratha, Siddharth Hariharan, Abhishek Maity, Abhishek Maity (5567630), Avik Bhattacharya (5567636), Debanshu Ratha (5567633), Siddharth Hariharan (5567627), Surendar Manickam (5567621), Shaunak De (5567618), Shaunak De, Surendar Manickam, Swinky Dhingra, Avik Bhattacharya, Arnab Muhuri, Arnab Muhuri (5567615), Swinky Dhingra (5567624)   +15 more
core   +1 more source

The Ceiling Height of Wildland Fire Plumes in Quasi‐Steady Stratified and Sheared Boundary Layers

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Radar observations from a prescribed fire experiment reveal a large‐scale, billow‐like vorticity structure associated with the plume head near the onset of plume bending. This bending limits the vertical extent of the plume and defines the characteristic plume ceiling height.
Jie Sun, Kevin Speer, Bryan Quaife, Ming Cai, David Schvartzman   +4 more
wiley   +1 more source

Robust Regional Contrast but Penetration‐Sensitive Snow Thickness Over Sea Ice From Multi‐Winter Antarctic CRYO2ICE Observations

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Snow on Antarctic sea ice modulates albedo, thermodynamic growth, and snow–ice formation, yet remains a leading uncertainty in altimetry‐derived sea‐ice thickness. Here we use the post‐2022 CRYO2ICE configuration to derive along‐track winter snow thickness from ICESat‐2 laser and CryoSat‐2 Ku‐band radar freeboards over the Weddell and Ross ...
Xinlong Liu, Alexander D. Fraser, Rachel L. Tilling, Petra Heil, Stuart P. Corney   +4 more
wiley   +1 more source

PolSAR Forest Height Estimation Enhancement With Polarimetric Rotation Domain Features and Multivariate Sensitivity Analysis

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Forest height is a critical indicator of forest health and can directly influence the carbon storage capacity of ecosystems. Polarimetric features extracted from polarimetric synthetic aperture radar play a crucial role in forest height estimation ...
Fu-Gen Jiang, Ming-Dian Li, Si-Wei Chen
doaj   +1 more source