Computer Science – Sound
Scientific paper
May 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003spd....34.0809c&link_type=abstract
American Astronomical Society, SPD meeting #34, #08.09; Bulletin of the American Astronomical Society, Vol. 35, p.823
Computer Science
Sound
Scientific paper
Local helioseismology, more specifically time-distance analysis, is a recent development in solar physics that gives us invaluable insight into the upper layers of the Sun. In this poster we show the results of a hare-and-hounds exercise concerning the inversion of time-distance data for perturbations to the sound-speed. We base our analysis on the Born approximation, which is expected to be more accurate than the usual ray-path approximation. We produce artificial time-distance data by solving the forward problem for travel times in the Born approximation. To invert these data, we apply the MCD (Multi-Channel Deconvolution) with Born approximation kernels, and the MCD and LSQR algorithms with ray theory kernels. We will present a detailed comparison between the different inversion results.
Birch Aaron C.
Couvidat Sebastien
Kosovichev Aleksandr G.
Zhao Jun
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