56 citations · 139 across the 10 of their papers we have counts for
11 papers
MOR-T L : A Novel Model Order Reduction Method for Parametrized Problems with Application to Seismic Wave Propagation
Julien Besset, Hélène Barucq, Rabia Djellouli +1
This paper presents an efficient strategy for constructing Reduced-Order Model (ROM) bases using Taylor polynomial expansions and Fr{é}chet derivatives with respect to model parame…
Direct assessment of SDO/HMI helioseismology of active regions on the Sun's far side using SO/PHI magnetograms
D. Yang, L. Gizon, H. Barucq +47
Earth-side observations of solar p modes can be used to image and monitor magnetic activity on the Sun's far side. Here we use magnetograms of the far side obtained by the Polarime…
Imaging individual active regions on the Sun's far side with improved helioseismic holography
Dan Yang, Laurent Gizon, Hélène Barucq
Helioseismic holography is a useful method to detect active regions on the Sun's far side and improve space weather forecasts. We aim to improve helioseismic holography by using a…
Polynomial-reproducing spline spaces from fine zonotopal tilings
Hélène Barucq, Henri Calandra, Julien Diaz +1
Given a point configuration A, we uncover a connection between polynomial-reproducing spline spaces over subsets of conv(A) and fine zonotopal tilings of the zonotope Z(V) associat…
Full Reciprocity-Gap Waveform Inversion in the frequency domain, enabling sparse-source acquisition
Florian Faucher, Giovanni Alessandrini, Hélène Barucq +3
The quantitative reconstruction of sub-surface Earth properties from the propagation of waves follows an iterative minimization of a misfit functional. In marine seismic exploratio…
Eigenvector Model Descriptors for Solving an Inverse Problem of Helmholtz Equation: Extended Materials
Florian Faucher, Otmar Scherzer, Hélène Barucq
We study the seismic inverse problem for the recovery of subsurface properties in acoustic media. In order to reduce the ill-posedness of the problem, the heterogeneous wave speed…
Signal and noise in helioseismic holography
Laurent Gizon, Damien Fournier, Dan Yang +2
Helioseismic holography is an imaging technique used to study heterogeneities and flows in the solar interior from observations of solar oscillations at the surface. Holograms cont…
Sensitivity kernels for time-distance helioseismology: efficient computation for spherically-symmetric solar models
Damien Fournier, Chris S. Hanson, Laurent Gizon +1
The interpretation of helioseismic measurements, such as wave travel-time, is based on the computation of kernels that give the sensitivity of the measurements to localized changes…
Atmospheric radiation boundary conditions for high frequency waves in time-distance helioseismology
Damien Fournier, Michael Leguebe, Chris S. Hanson +4
The temporal covariance between seismic waves measured at two locations on the solar surface is the fundamental observable in time-distance helioseismology. Above the acoustic cut-…
Computational helioseismology in the frequency domain: acoustic waves in axisymmetric solar models with flows
Laurent Gizon, Hélène Barucq, Marc Duruflé +7
Local helioseismology has so far relied on semi-analytical methods to compute the spatial sensitivity of wave travel times to perturbations in the solar interior. These methods are…
True amplitude one-way propagation in heterogeneous media
Hélène Barucq, Bertrand Duquet, Frank Prat
This paper deals with the numerical analysis of two one-way systems derived from the general complete modeling proposed by M.V. De Hoop. The main goal of this work is to compare tw…