Results 61 to 70 of about 1,140 (180)

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

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

Sensitivity of Polarimetric SAR Decompositions to Soil Moisture and Vegetation Over Three Agricultural Sites Across a Latitudinal Gradient

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
The goal of this work is to assess the impact of polarimetric SAR decompositions for soil moisture retrieval, and identify the decomposition that performs best for varying vegetation covers and soil conditions.
Giovanni Anconitano, Marco Lavalle, Mario Alberto Acuna, Nazzareno Pierdicca   +3 more
doaj   +1 more source

Assessment of GF3 Full-Polarimetric SAR Data for Dryland Crop Classification with Different Polarimetric Decomposition Methods. [PDF]

Sensors (Basel), 2022
Wang M, Liu C, Han D, Wang F, Hou X, Liang S, Sui X.   +6 more
europepmc   +1 more source

Model-Based Polarimetric Decomposition With Higher Order Statistics

IEEE Geoscience and Remote Sensing Letters, 2019
This letter presents a new general framework for solving polarimetric target decompositions that extends them to use more statistical information and include radar texture models. Polarimetric target decomposition methods generally have more physical parameters than equations and are, thus, underdetermined and have no unique solution.
Torbjørn Eltoft, Anthony P. Doulgeris
openaire   +2 more sources

Discriminant Analysis Based Graph for Feature Extraction and Classification of Polarimetric SAR Images [PDF]

ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences
Polarimetric Synthetic Aperture Radar (PolSAR) imagery, as an advanced remote sensing technology provides rich information about the scattering characteristics of the Earth's surface, significantly enhancing classification accuracy.
F. Saneipour, M. Imani, H. Ghassemian
doaj   +1 more source

Mapping Glacierized Regions With Quad-Pol Dual Frequency LS-ASAR: Insights for the NISAR Mission

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
NISAR, a spaceborne L- and S-band radar mission, is set to launch in 2025. As part of mission testing, airborne L- and S-band radar sensors were employed to obtain dual-frequency quad-polarimetric (LS-ASAR) data in the United States. This study evaluates
Gopika Das, Prankur Sharma, Saurabh Vijay, Umesh K Haritashya, Jeffrey Kargel, Sushil Kumar Singh, Batuhan Osmanoglu, Pawan Singh, Dan H Shugar   +8 more
doaj   +1 more source

A Three-Component Polarimetric Target Decomposition Algorithm for Grasslands

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing
Previous polarimetric target decomposition methods have been widely used in forests and buildings and have achieved good results. However, there is a lack of corresponding modeling for the study of grassland scattering characteristics.
Baokun Liu, Xiaoqi Lv, Xiujuan Li, Xiangli Yang, Pingping Huang, Weixian Tan, Yongguang Zhai, Yuejuan Chen, Kunpeng Xu   +8 more
doaj   +1 more source

Autonomous Coastal Land Cover Assessment Using Polarimetric Decomposition of SAR Data [PDF]

ITB Journal of Engineering Science, 2011
The paper reports an experiment on classification using fully polarimetric SAR data. Many reports have been presented mentioning test sites in temperate regions utilizing polarimetric SAR data from airborne and/or spaceborne SAR sensors.
Bambang H. Trisasongko
doaj