Results 21 to 30 of about 167 (137)

Improved Tropical Cyclone Wind Estimation Using Dual‐Polarization C‐Band SAR and Machine Learning

Earth and Space Science, Volume 13, Issue 5, May 2026.
Abstract Tropical cyclones (TCs) characterized by extreme wind speeds present severe hazards to human life and infrastructure. Spaceborne synthetic aperture radar (SAR) has emerged as a critical observational tool for TCs, owing to its all‐weather, high‐resolution imaging capabilities.
Chaogang Guo, Weihua Ai, Xianbin Zhao, Zhancai Liu, Hongwei Yang, Jiajia Tang   +5 more
wiley   +1 more source

Medicane characteristics from high‐resolution satellite radar observations

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 776, April 2026 Part A.
This study uses high‐resolution observations from satellite synthetic aperture radar (SAR) to reveal that medicanes, cyclones with tropical features in the Mediterranean basin, have dynamical characteristics with attributes comparable with those of tropical cyclones of similar intensities, but smaller outer sizes and Rossby numbers.
Arthur Avenas, Mario Marcello Miglietta, Alexis Mouche, Stavros Dafis, Aurélien Colin, Romain Husson, Emmanouil Flaounas   +6 more
wiley   +1 more source

Overview of SWALIS, KaRADOC and HOMARDS: A Suite of Airborne Radars to Support Satellite Earth Observation Missions. SWOT Calibration/Validation Campaign in South Rhine

IET Radar, Sonar &Navigation, Volume 20, Issue 1, January/December 2026.
The figure provides an overview of the uncalibrated NRCS measurements taken above the La Chèze water storage. The path is visible on an satellite map as traces showing higher reflected power (brighter areas) compared to the surrounding ground. ABSTRACT This paper presents the different airborne radar systems which are developed at IETR (Institut d ...
Stéphane Méric, Jean‐Claude Koumi, Erwan Rahault, Pottier Éric, Jordi Chinaud, Louis Marié, Guy Grunfelder, Cécile Leconte, Stéphane Avrillon, Mohamed Himdi, María García‐Vigueras, Paul Leroy   +11 more
wiley   +1 more source

Pointing Calibration for Spaceborne Doppler Scatterometers

Remote Sensing
Doppler scatterometers have demonstrated the ability to measure wide-swath ocean surface currents from airborne platforms. Since platform velocities for spaceborne platforms are almost two orders of magnitude larger, errors in the knowledge of the ...
Ernesto Rodríguez, Hector Torres, Alexander G. Wineteer, Antoine Blondel, Clément Ubelmann   +4 more
doaj   +1 more source

Desert pavements: A hidden key to Earth surface processes

Earth Surface Processes and Landforms, Volume 50, Issue 15, December 2025.
Desert pavements are a global phenomenon in arid environments, representing one of the most extensive geomorphological and geoecological features on Earth. To a large extent, they determine the interplay of key processes governing current and past landscape dynamics.
Markus Fuchs, Michael Dietze, Alexander Brenning, Daniela Sauer, Kerstin Schepanski, Dirk Wagner   +5 more
wiley   +1 more source

Airborne Lidar to Verify ICESat‐2 Arctic Summer Sea Ice Heights and Melt Pond Depths: Calibration and Validation Campaign, Greenland 2022

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract In July 2022, the National Aeronautics and Space Administration (NASA) funded an airborne lidar data acquisition campaign over the central Arctic Ocean to evaluate ICESat‐2 ATLAS (Ice, Cloud, and Land Elevation Satellite, Advanced Topographic Laser Altimeter System) retrievals of summer sea ice heights and melt pond characteristics.
Kutalmis Saylam, Aaron R. Averett, John R. Andrews, Shelby R. Short, Nathan T. Kurtz, Rachel L. Tilling   +5 more
wiley   +1 more source

Observing Interactions Between Waves, Winds, and Currents From SWOT

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract The Surface Water and Ocean Topography (SWOT) satellite mission enables, for the first time, two‐dimensional (2D) mapping of significant wave height Hs $\left({H}_{s}\right)$ at kilometer‐scale resolution. Using data from SWOT's Ka‐band Radar Interferometer (KaRIn), this study investigates interactions between surface waves, winds, and ...
A. B. Villas Bôas, Gwendal Marechal, Alejandro Bohé   +2 more
wiley   +1 more source

Asymmetry of Cyclonic Sea Surface Wind and Wave Observed by SAR

Geophysical Research Letters, Volume 52, Issue 17, 16 September 2025.
Abstract CyclObs‐derived wind and SWH field are extracted from over 600 dual‐polarized Sentinel‐1 (S‐1) images of around 300 tropical cyclones (TCs) over the past eight years to investigate asymmetry of wind and wave fields during TCs. Fetch analysis and machine learning technique, eXtreme Gradient Boosting (XGBoost), is used to establish a ...
Weizeng Shao, Yuyi Hu, Qingping Zou, Maurizio Migliaccio, Xingwei Jiang   +4 more
wiley   +1 more source

Tropical Cyclones Across Global Basins: Dynamics, Tracking Algorithms, Forecasting, and Emerging Scientometric Research Trends

Meteorological Applications, Volume 32, Issue 3, May/June 2025.
Graphical abstract illustrating the integrated framework of tropical cyclone dynamics, advanced tracking algorithms, and evolving research frontiers for improved forecasting and risk mitigation. ABSTRACT Tropical cyclones (TCs) pose significant threats to life and property across global ocean basins, and forecasting their structural evolution, track ...
Vivek Singh, Gaurav Tiwari, Amarendra Singh, Rajeeb Samanta, Atul Kumar Srivastava, Deewan Singh Bisht, Ashish Routray, Sushil Kumar, Shivaji Singh Patel, Abhishek Lodh   +9 more
wiley   +1 more source

Satellite scatterometer estimation of urban built-up volume: Validation with airborne lidar data

International Journal of Applied Earth Observation and Geoinformation, 2019
Abstract Accurately mapping urban infrastructure and extent is a high priority for resource management and service allocation as well as for addressing environmental, socioeconomic, and geopolitical concerns. Most available data products only document surficial (two-dimensional) land use and land cover (LULC), yet a substantial component of urban ...
Adam J. Mathews, Amy E. Frazier, Son V. Nghiem, Gregory Neumann, Yun Zhao   +4 more
openaire   +2 more sources