Multi-channel OLA Inversion for Local Helioseismology

Details Multi-channel OLA Inversion for Local Helioseismology Multi-channel OLA Inversion for Local Helioseismology

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spd....40.0714j&link_type=abstract

American Astronomical Society, SPD meeting #40, #7.14; Bulletin of the American Astronomical Society, Vol. 41, p.814

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We present preliminary results of a three-dimensional inversion for local helioseismology, in particular utilizing the time-distance technique. This inversion is unique in that in combines a Fourier-space multi-channel deconvolution with the optimally localized averages (OLA) method. The result is a very computationally efficient procedure that is fully parallelizable and suited for large-scale inversions needed for future studies. A simple example of the inversion is shown using point-to-point Born approximation kernels for sound-speed perturbations and the travel-time noise covariance. A step-by-step comparison is shown with a recently developed real-space OLA inversion to demonstrate the benefits of a Fourier-space formulation.

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