Results 1 to 10 of about 9,337 (147)

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   +2 more sources

Full-parametric, transdimensional, and joint inversion of surface wave dispersion and earthquake-based HVSR by MBMO for obtaining reliable subsurface structures [PDF]

Scientific Reports
We present the Modified Barnacles Mating Optimizer (MBMO), a novel global optimization algorithm designed to enhance the accuracy of full-parametric, transdimensional, and joint inversion of earthquake-based Horizontal-to-Vertical Spectral Ratio (HVSR ...
Hanbing Ai, Kamal Abdelrahman, Ahmed M. Eldosouky   +2 more
doaj   +2 more sources

Cross-correlation function in the interpretation of potential fields anomalies of strike-slip nature [PDF]

E3S Web of Conferences, 2023
In the study, a comparison of correlation characteristics that can be obtained when analyzing areal geophysical data in COSCAD 3D, GIS INTEGRO software, as well as in custom software with a novel approach, has been conducted.
Asoskov Artem, Matykina Darya
doaj   +1 more source

Verification of C-Band Geophysical Model Function for Wind Speed Retrieval in the Open Ocean and Inland Water Conditions

Geosciences, 2023
Verification of the C-band geophysical model functions (GMF) for the open ocean and the Gorky reservoir was carried out using Sentinel-1 IW-mode Synthetic aperture radar (SAR) images. CMOD5.N, CMOD7, GMF for the Caspian Sea, and CSARMOD2 were considered.
Daniil Sergeev, Olga Ermakova, Nikita Rusakov, Evgeny Poplavsky, Daria Gladskikh   +4 more
doaj   +1 more source

Friction Velocity and Aerodynamic Drag Coefficient Retrieval from Sentinel-1 IW Cross-Polarization C-SAR Images under Hurricane Conditions

Remote Sensing, 2023
This study presents an approach for friction velocity and aerodynamic drag coefficient retrieval utilizing C-band VH SAR observations from Sentinel-1.
Olga Ermakova, Nikita Rusakov, Evgeny Poplavsky, Daniil Sergeev, Yuliya Troitskaya   +4 more
doaj   +1 more source

A C-band cross polarization geophysical model function [PDF]

2015 IEEE International Geoscience and Remote Sensing Symposium (IGARSS), 2015
Microwave backscattering from the ocean surface is closely related to the wind-generated ocean surface roughness. This property is used for obtaining global ocean surface vector winds. The deployed scatterometers so far do not use the cross-polarized sea return (VH, representing either vertical transmit horizontal receive or horizontal transmit ...
Paul A. Hwang, Ad Stoffelen, Gerd-Jan van Zadelhoff, William Perrie, Biao Zhang 0001, Haiyan Li, Hui Shen 0001   +6 more
openaire   +1 more source

A GNSS-R Geophysical Model Function [PDF]

IEEE Geoscience and Remote Sensing Letters, 2020
A machine learning technique is implemented for retrieving space-borne Global Navigation Satellite System Reflectometry (GNSS-R) wind speed. Conventional approaches commonly fit a function in a predefined form to matchup data in a least-squares (LS) sense, mapping GNSS-R observations to wind speed. In this study, a feedforward neural network is trained
Asgarimehr, Milad (Dr.-Ing.), Zhelavskaya, Irina (Dr.), Foti, Giuseppe, Reich, Sebastian (Prof.), Wickert, Jens (Prof. Dr.)   +4 more
openaire   +5 more sources

Sea‐Ice Detection From Near‐Nadir Ku‐Band Echoes From CFOSAT/SWIM Scatterometer

Earth and Space Science, 2022
SWIM on board CFOSAT is the first spaceborne, low incidence, rotating scatterometer, aiming at measuring in near‐real time ocean waves spectra. With five off‐nadir beams at incidences between 2° and 10° plus one nadir beam, it covers the Earth in 13 days,
Charles Peureux, Nicolas Longépé, Alexis Mouche, Céline Tison, Cédric Tourain, Jean‐Michel Lachiver, Danièle Hauser   +6 more
doaj   +1 more source

TDS-1 GNSS reflectometry wind geophysical model function response to GPS block types

Geo-spatial Information Science, 2022
This paper presents the TDS-1 GNSS reflectometry wind Geophysical Model Function (GMF) response to GPS block types. The observables were extracted from Delay Doppler Maps (DDMs) after taking the receiver antenna gains effects and GNSS-R geometry effects ...
Fade Chen, Xiaohong Zhang, Fei Guo, Jiazhu Zheng, Yang Nan, Mohamed Freeshah   +5 more
doaj   +1 more source

Integration of geoscientific uncertainty into geophysical inversion by means of local gradient regularization [PDF]

Solid Earth, 2019
We introduce a workflow integrating geological modelling uncertainty information to constrain gravity inversions. We test and apply this approach to the Yerrida Basin (Western Australia), where we focus on prospective greenstone belts beneath sedimentary
J. Giraud, M. Lindsay, V. Ogarko, M. Jessell, R. Martin, E. Pakyuz-Charrier   +5 more
doaj   +1 more source