Results 31 to 40 of about 1,814,299 (311)
High Wind Geophysical Model Function Modeling for the HY-2A Scatterometer Using Neural Network
Remote Sensing, 2022 Under low to medium wind speeds and no rainfall, the retrieved vector wind from a scatterometer is accurate and reliable. However, under high wind conditions, the currently used geophysical model function (GMF), such as NSCAT-2, for wind vector retrieval
Xuetong Xie, Jing Wang, Mingsen Lin
doaj +1 more source
A New Approach for Ocean Surface Wind Speed Retrieval Using Sentinel-1 Dual-Polarized Imagery
Remote Sensing, 2023 A synthetic aperture radar (SAR) has the capability to observe ocean surface winds with a high spatial resolution, even under extreme conditions. The purpose of this work was to develop a new method for wind speed retrieval with the combination of SAR ...
Yuan Gao, Yunhua Wang, Weili Wang
doaj +1 more source
Auto-correlation analysis of ocean surface wind vectors
Journal of Earth System Science, 2002 The nature of the inherent temporal variability of surface winds is analyzed by comparison of winds obtained through different measurement methods. In this work, an auto-correlation analysis of a time series data of surface winds measuredin situ by a deep water buoy in the Indian Ocean has been carried out.
Abhijit Sarkar +3 more
openaire +2 more sources
Measurement of ocean wind vector by an airborne, imaging polarimetric radiometer [PDF]
Radio Science, 1998 Airborne measurements of the sea surface have been carried out with an imaging polarimetric 16‐GHz radiometer system, aimed at determining the wind direction. The radiometer system features a high‐speed digital correlator, and it measures all four parameters of the brightness temperature Stokes vector simultaneously.
Niels Skou, Brian Laursen
openaire +1 more source
Evaluation of Spaceborne GNSS-R Retrieved Ocean Surface Wind Speed with Multiple Datasets
Remote Sensing, 2019 Spaceborne Global Navigation Satellite Systems-Reflectometry (GNSS-R) can estimate the geophysical parameters by receiving Earth’s surface reflected signals. The CYclone Global Navigation Satellite System (CYGNSS) mission with eight microsatellites
Zhounan Dong, Shuanggen Jin
doaj +1 more source
Ionic Gating of Liquid‐Crystal‐Like Pteridine Assemblies Enables Tunable Light Scattering
Advanced Materials, EarlyView.Tunable optical properties emerge through developmentally regulated ionic gating, which transforms disordered, ultraviolet (UV)‐absorbing organelles into concentrically ordered, liquid‐crystal‐like light scatterers. By integrating analyses of pteridine composition, potassium‐dependent assembly, hierarchical ultrastructure, and optical behavior, the ...
Sourabh Bera +22 more
wiley +1 more source
Ocean Winds and Turbulent Air-Sea Fluxes Inferred From Remote Sensing [PDF]
Oceanography, 2010 Surface turbulent fluxes are key pathways through which the atmosphere is coupled with the ocean. They provide mechanisms through which momentum, energy, moisture, and materials such as CO2 are transferred between the ocean and atmosphere. Surface fluxes
Mark A. Bourassa +4 more
doaj
Advanced Robotics Research, EarlyView.A sea turtle‐inspired amphibious robot uses simulation‐guided optimization to adapt its flipper coordination to different environments. Sensitivity analysis and multiobjective Bayesian optimization identify terrain‐dependent controllers that are validated on hardware.
Nnamdi C. Chikere, Yasemin Ozkan‐Aydin
wiley +1 more source
Scientific Developments and the EPS-SG Scatterometer
IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2017 The second-generation exploitation of meteorological satellite polar system (EPS-SG) C-band-wavelength scatterometer instrument (called SCA), planned for launch in 2022, has a direct heritage from the successful advanced scatterometer (ASCAT) flown on ...
Ad Stoffelen +9 more
doaj +1 more source
XeraBorg: Neural Control of Tail‐Flick Escape for Backward Propulsion in Cyborg Crayfish
Advanced Robotics Research, EarlyView.This work presents the first controlled tail‐flick propulsion method for the cyborg Cherax quadricarinatus. Comprehensive experiments establish a foundational framework for using the crayfish's natural escape mechanism as a locomotion strategy, expanding its potential as an underwater and amphibious mobile robot.
H. Nhan Le +7 more
wiley +1 more source