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A procedure for the inversion of f‐mode travel times for solar flows
Author(s) -
Jackiewicz J.,
Gizon L.,
Birch A. C.,
Thompson M. J.
Publication year - 2007
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200610725
Subject(s) - inversion (geology) , wavelength , mode (computer interface) , travel time , geodesy , physics , computational physics , meteorology , geology , optics , computer science , seismology , engineering , transport engineering , tectonics , operating system
We perform a two‐dimensional inversion of f‐mode travel times to determine near‐surface solar flows. The inversion is based on optimally localized averaging of travel times. We use finite‐wavelength travel‐time sensitivity functions and a realistic model of the data errors.We find that it is possible to obtain a spatial resolution of 2 Mm. The error in the resulting flow estimate ultimately depends on the observation time and the number of travel distances used in the inversion. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)