Počet záznamů: 1
Choice of regularization in adjoint tomography based on two-dimensional synthetic tests
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SYSNO ASEP 0448532 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Choice of regularization in adjoint tomography based on two-dimensional synthetic tests Tvůrce(i) Valentová, L. (SK)
Gallovič, F. (SK)
Růžek, Bohuslav (GFU-E) ORCID, RID
de la Puente, J. (ES)
Moczo, P. (SK)Zdroj.dok. Geophysical Journal International - ISSN 0956-540X
Roč. 202, č. 2 (2015), s. 787-799Poč.str. 13 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova numerical approximations and analysis ; seismic tomography ; Europe Vědní obor RIV DC - Seismologie, vulkanologie a struktura Země Institucionální podpora GFU-E - RVO:67985530 UT WOS 000360624600008 DOI 10.1093/gji/ggv183 Anotace We present synthetic tests of 2-D adjoint tomography of surface wave traveltimes obtained by the ambient noise cross-correlation analysis across the Czech Republic. The data coverage may be considered perfect for tomography due to the density of the station distribution. Nevertheless, artefacts in the inferred velocity models arising from the data noise may be still observed when weak regularization (Gaussian smoothing of the misfit gradient) or too many iterations are considered. To examine the effect of the regularization and iteration number on the performance of the tomography in more detail we performed extensive synthetic tests. Instead of the typically used (although criticized) checkerboard test, we propose to carry out the tests with two different target models-simple smooth and complex realistic models. The first test reveals the sensitivity of the result on the data noise, while the second helps to analyse the resolving power of the data set. For various noise and Gaussian smoothing levels, we analysed the convergence towards (or divergence from) the target model with increasing number of iterations. Pracoviště Geofyzikální ústav Kontakt Hana Krejzlíková, kniha@ig.cas.cz, Tel.: 267 103 028 Rok sběru 2016
Počet záznamů: 1