Zobrazeno 1 - 10
of 32
pro vyhledávání: '"Ekkehart Tessmer"'
Publikováno v:
SEG Technical Program Expanded Abstracts 2016.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::90383574f24821dfe75dbf9bb42ad70a
https://doi.org/10.1190/segam2016-13870908.1
https://doi.org/10.1190/segam2016-13870908.1
Publikováno v:
Scopus-Elsevier
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6cf4399ea9b73b6fd4583e5f1c7988bf
https://doi.org/10.3997/2214-4609.201600122
https://doi.org/10.3997/2214-4609.201600122
Publikováno v:
Studia Geophysica et Geodaetica. 56:35-64
The standard ray theory (RT) for inhomogeneous anisotropic media does not work properly or even fails when applied to S-wave propagation in inhomogeneous weakly anisotropic media or in the vicinity of shear-wave singularities. In both cases, the two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83f9e4c3b5069e2f53c2af80b9f1cf3f
https://doi.org/10.1007/s11200-010-0086-7
https://doi.org/10.1007/s11200-010-0086-7
Autor:
Ekkehart Tessmer
Publikováno v:
GEOPHYSICS. 76:S177-S185
Reverse-time migration is based on seismic forward modeling algorithms, where spatial derivatives usually are calculated by finite differences or by the Fourier method. Time integration in general is done by finite-difference time stepping of low ord
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4d35ec6c12942bfb1b3c09074af921c
https://doi.org/10.1190/1.3587217
https://doi.org/10.1190/1.3587217
Autor:
Dirk Gajewski, Ekkehart Tessmer
Publikováno v:
Geophysical Journal International. 163:276-284
SUMMARY The localization of seismic events is of utmost importance in seismology and exploration. Current techniques rely on the fact that the recorded event is detectable at most of the stations of a seismic network. Weak events, not visible in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a3eb91ffc4f736e53760c4ae3eccbb64
https://doi.org/10.1111/j.1365-246x.2005.02732.x
https://doi.org/10.1111/j.1365-246x.2005.02732.x
Publikováno v:
Geophysical Prospecting. 46:603-616
Conventional finite-difference modelling algorithms for seismic forward modelling are based on a time-stepping scheme with a constant (global) time step. Large contrasts in the velocity model or in the spatial sampling rate cause oversampling in time
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9fa22895ce61c793c6e2e337bbf5413a
https://doi.org/10.1046/j.1365-2478.1998.00110.x
https://doi.org/10.1046/j.1365-2478.1998.00110.x
Publikováno v:
Pure and Applied Geophysics PAGEOPH. 148:77-93
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::160e9acf5553e6ba144abedcd3be7ccf
https://doi.org/10.1007/bf00882055
https://doi.org/10.1007/bf00882055
Autor:
Ekkehart Tessmer
Publikováno v:
Geophysical Journal International. 121:557-575
Summary A 3-D spectral method for seismic modelling in general anisotropic media is presented. An important property of the method is its ability to handle the free-surface boundary conditions accurately. Moreover, since it is a grid method, the algo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d6d2f0764ebe08a2793dd416f7479d4e
https://doi.org/10.1111/j.1365-246x.1995.tb05733.x
https://doi.org/10.1111/j.1365-246x.1995.tb05733.x
Autor:
Ekkehart Tessmer, Dan Kosloff
Publikováno v:
GEOPHYSICS. 59:464-473
The 3-D numerical Chebychev modeling scheme accounts for surface topography. The method is based on spectral derivative operators. Spatial differencing in horizontal directions is performed by the Fourier method, whereas vertical derivatives are carr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fe78cc98d8703dfea3e0e1386d1264b6
https://doi.org/10.1190/1.1443608
https://doi.org/10.1190/1.1443608
Publikováno v:
12th International Congress of the Brazilian Geophysical Society & EXPOGEF, Rio de Janeiro, Brazil, 15–18 August 2011.
The standard anisotropic ray theory does not work properly or even fails when applied to S-wave propagation in inhomogeneous weakly anisotropic media or in the vicinity of shear-wave singularities, where the two shear waves propagate with similar pha
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e758cb7dad5df018fa5cfa29cd7c1ab
https://doi.org/10.1190/sbgf2011-364
https://doi.org/10.1190/sbgf2011-364