Results 1 to 10 of about 22,150,955 (299)

Time Domain Spherical Harmonic Processing with Open Spherical Microphones Recording

open access: yesApplied Sciences, 2021
Spherical harmonic analysis has been a widely used approach for spatial audio processing in recent years. Among all applications that benefit from spatial processing, spatial Active Noise Control (ANC) remains unique with its requirement for open ...
Huiyuan Sun   +2 more
doaj   +2 more sources

Antarctic Time-Variable Regional Gravity Field Model Derived from Satellite Line-of-Sight Gravity Differences and Spherical Cap Harmonic Analysis

open access: yesRemote Sensing, 2023
This study focuses on the development of a time-variable regional geo-potential model for Antarctica using the spherical cap harmonic analysis (SCHA) basis functions.
Mohsen Feizi   +2 more
doaj   +1 more source

Joint analysis of selected GRACE monthly spherical harmonic solutions and monthly MASCON solutions

open access: yesContributions to Geophysics and Geodesy, 2021
Study presented in this paper is focused on comparison and statistical assessment of differences between the selected Level 2 products of the satellite mission Gravity Recovery and Climate Experiment (GRACE).
Adam NOVÁK   +2 more
doaj   +1 more source

Real Harmonic Analysis on the Special Orthogonal Group

open access: yesInternational Journal of Analysis and Applications, 2022
This paper presents theoretical analysis and software implementation for real harmonics analysis on the special orthogonal group. Noncommutative harmonic analysis for complex-valued functions on the special orthogonal group has been studied extensively ...
Taeyoung Lee
doaj   +1 more source

Empirical Modeling of Ionospheric Current Using Empirical Orthogonal Function Analysis and Artificial Neural Network

open access: yesSpace Weather, 2021
Given the potential importance of solar quiet (Sq) ionospheric current in geomagnetic field modeling, it is vital to obtain accurate parameters characterizing its variations, particularly the spatial and temporal variations. In this paper, we derived the
Charles Owolabi   +7 more
doaj   +1 more source

Multiscale Three-Dimensional Morphological Characterization of Calcareous Sand Particles Using Spherical Harmonic Analysis

open access: yesFrontiers in Physics, 2021
Particle morphology is a fundamental inherent property that substantially affects the macroscopic behavior of granular materials. The division and separation of particle morphology at different scale levels contributes to the further multiscale ...
Hui Liang   +3 more
doaj   +1 more source

Regional geomagnetic field modelling: the contribution of the Istituto Nazionale di Geofisica

open access: yesAnnals of Geophysics, 1997
Models of the geomagnetic field are mathematical expressions able to represent the Earth's magnetic field space and time variations. Time variations on the long term basis are represented by the so-called secular variation.
A. Meloni   +3 more
doaj   +1 more source

Empirical Orthogonal Function Analysis and Modeling of Global Tropospheric Delay Spherical Harmonic Coefficients

open access: yesRemote Sensing, 2021
Based on the ERA-5 meteorological data from 2015 to 2019, we establish the global tropospheric delay spherical harmonic (SH) coefficients set called the SH_set and develop the global tropospheric delay SH coefficients empirical model called EGtrop using ...
Yongchao Ma   +3 more
doaj   +1 more source

A high-resolution lithospheric magnetic field model over southern Africa based on a joint inversion of CHAMP, Swarm, WDMAM, and ground magnetic field data [PDF]

open access: yesSolid Earth, 2018
We derive a lithospheric magnetic field model up to equivalent spherical harmonic degree 1000 over southern Africa. We rely on a joint inversion of satellite, near-surface, and ground magnetic field data.
F. Vervelidou, E. Thébault, M. Korte
doaj   +1 more source

An Innovative Slepian Approach to Invert GRACE KBRR for Localized Hydrological Information at the Sub-Basin Scale

open access: yesRemote Sensing, 2021
GRACE spherical harmonics are well-adapted for representation of hydrological signals in river drainage basins of large size such as the Amazon or Mississippi basins.
Guillaume Ramillien   +2 more
doaj   +1 more source

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