R. Biloti, L. T. Santos and M. Tygel, 2002,
Multiparametric traveltime inversion, Stud.
Geophys. Geod., 46, pp. 177-192.
C. Piedrahita, M. Tygel, L. T. Santos and N. Bleinstein,
2002, Applications of automata theory to ray
tracing, submited to SEG 2002.
[download]
M. Tygel, L. T. Santos and J. Schleicher, 2002,
Multifocus moveout revisited: derivations and alternative expressions,
Revised version of Technical Report, IMECC-UNICAMP, RP 34/99.
[download]
S. da Silva Araujo and M. Tygel, 2001,
Construção de imagens sísmicas pelo método de Superfície de Reflexão
Comum (CRS), 7th international congress of the
Brazilian geophysical society, 1037-1040.
[download]
R. Biloti, R. S. Portugal, L. T. Santos and M. Tygel,
2001, Obtaining AVO and AVA curves from CRS
attributes, Technical Report, IMECC-UNICAMP, RP 25/01.
[download]
R. Biloti, R. Portugal, L. T. Santos and M. Tygel,
2001, Obtaining AVO and AVA curves from CRS attributes,
Journal of Seismic Exploration, vol. 10, 19-29.
R. Biloti, L. T. Santos and M. Tygel, 2001,
Layered velocity model from kynematic attributes,
Expanded Abstracts of the 7th International Congress of the Brazilian
Geophysical Society, 7CISBGf/TS9, 1055-1058.
[download]
R. Biloti, L. T. Santos and M. Tygel, 2001,
Multiparametric traveltime inversion,
Technical Report IMECC-UNICAMP, RP 48/01.
[download]
P. Chira-Oliva, M. Tygel, Y. Zhang and P. Hubral,
2001, Analytic CRS formula for a 2D curved measurement
surface and finite-offset reflections, Journal of
Seismic Exploration, vol. 10, 245-262.
V. Grosfeld, R. Biloti, L. T. Santos and M. Tygel,
2001, Topographic effect correction using CRS parameters,
Technical Report IMECC-UNICAMP, RP 47/01.
[download]
C. Guerra, E. Filpo and M. Tygel, 2001,
Atenuação de múltiplas por empilhamento Kirchhoff em afastamento
comun, Expanded Abstracts of the 7th International
Congress of the Brazilian Geophysical Society, 1209-1210.
[download]
R. S. Portugal, R. Biloti, L. T. Santos and M. Tygel,
2001, CRS as a tool for true amplitude imaging,
Expanded Abstracts of the 7th International Congress of the Brazilian
Geophysical Society, 7CISBGf/TS9, 1041-1044.
[download]
R. Portugal, R. Biloti, L. T. Santos and M. Tygel,
2001, CRS as a tool for true amplitude imaging,
7th international congress of the Brazilian geophysical society,
1041-1042.
[download]
R. S. Portugal, R. Biloti, L. T. Santos and M. Tygel,
2001, CRS as a tool for true amplitude imaging,
71st Ann. Internat. Meeting, SEG, Workshop on Velocity Model Independent
Imaging for Complex Media.
[download]
O. Peres, D. Kosloff, Z. Koren and M. Tygel, 2001,
A practical approach to true-amplitude migration,
Journal of Seismic Exploration, vol. 10, 183-204.
D. Rousset, H. Perroud and M. Tygel, 2001,
AVO analysis based on purely kinematic imaging,
Expanded Abstracts of the 7th International Congress of the Brazilian
Geophysical Society, 1739-1742.
[download]
D. Rousset, M. Tygel and H. Perroud, 2001,
Attaching true amplitudes on kinematically migrated images,
Journal of Seismic Exploration, vol. 10, 149-164.
J. Schleicher, L. T. Santos and M. Tygel, 2001,
Seismic migration by demodeling, Journal of
Seismic Exploration, vol. 10, 59-76.
L. T. Santos, M. Tygel and A. Buginga, 2001,
Reflection impedance, 7th international
congress of the Brazilian geophysical society, 21-24.
[download]
J. Schleicher, M. Tygel, B. Ursin and N. Bleistein,
2001, The Kirchhoff-Helmholtz integral for
anisotropic elastic media, Wave Motion, vol. 34,
353-364.
[download]
M. Tygel, J. Schleicher, L. T. Santos and P. Hubral,
2001, The Kirchhoff-Helmholtz integral pair,
Journal of Computational Acoustics, 9, 1383-1394,2001.
[download]
M. Tygel, L. T. Santos, A. C. Vasquez and A. S. Oliveira,
2001, Recuperação de atributos sísmicos utilizando
a migração para afastamento nulo, 7th international
congress of the Brazilian geophysical society, 1091-1094.
[download]
J. C. R. Cruz, P. Hubral, M. Tygel, J. Schleicher and G. Hocht,
2000, The common reflecting element (CRE) method
revisited, Geophysics, vol. 65, no. 3, 979-993.
[download]
L. T. Santos, J. Schleicher, M. Tygel and P. Hubral,
2000, Seismic modeling by demigration,
Geophysics, vol. 65, no. 04, 1281-1289.
[download]
L. T. Santos, J. Schleicher, M. Tygel and P. Hubral,
2000, Modeling, migration, and demigration,
The Leading Edge, vol. 19, no. 7, 712-715.
[download]
J. Schleicher, M. Tygel, B. Ursin and N. Bleistein,
2000, The Kirchhoff-Helmholtz integral for
anisotropic elastic media, Technical Report,
IMECC-UNICAMP, RP 38/00.
[download]
E. G. Birgin, R. Biloti, L. T. Santos and M. Tygel,
1999, Traveltime Multiparameter Estimation Using
Bound Constrained Optimization: A First Approach,
Technical Report, IMECC-UNICAMP, RP 14/99.
[download]
E. G. Birgin, R. Biloti, M. Tygel and L. T. Santos,
1999, Restricted optimization: a clue to a fast
and accurate implementation of the Common Reflection Surface Stack method,
Journal of Applied Geophysics, 42, pp. 143-155.
[download]
E. G. Birgin, R. Biloti, M. Tygel and L. T. Santos,
1999, A New Algorithm for Traveltime
Multiparameter Estimation, in the Annals of the Sixth
International Congress of the Brazilian Geophysical Society, SBGF301, 15-19
August, Rio de Janeiro, Brazil.
[download]
E. Filpo and M. Tygel, 1999,
Deep-water multiple-suppression in the near-offset range,
The Leading Edge, vol. 18, no. 1, 81-84.
[download]
M. Tygel, P. Hubral, J. Schleicher and L. T. Santos,
1999, The Kirchhoff-Helmholtz integral pair,
69th Ann. Internat. Mtg: Soc. Of Expl. Geophys., 1821-1824.
[download]
M. Tygel, L. T. Santos, J. Schleicher and P. Hubral,
1999, Kirchhoff imaging as a tool for AVO/AVA
analysis, The Leading Edge, vol. 18, no. 8, 940-945.
[download]
M. Tygel, J. Schleicher, L. T. Santos and P. Hubral,
1999, An asymptotic inverse to the
Kirchhoff-Helmholtz integral, Technical Report,
IMECC-UNICAMP, RP 39/99.
[download]
M. Tygel, L. T. Santos, J. Schleicher and P. Hubral,
1999, Kirchhoff imaging as a tool for AVO/AVA
analysis, Technical Report, IMECC-UNICAMP, RP 31/99.
[download]
M. Tygel, L. T. Santos and J. Schleicher, 1999,
Multifocus moveout revisited: derivations and alternative expressions,
Technical Report, IMECC-UNICAMP, RP 34/99.
[download]
L. T. Santos, J. Schleicher, P. Hubral and M. Tygel,
1998, Is seismic demigration equivalent to foward
modeling?, Technical Report, IMECC-UNICAMP, RP 26/98.
[download]
L. T. Santos, J. Schleicher, P. Hubral and M. Tygel,
1998, Modeling, migration and demigration,
Technical Report, IMECC-UNICAMP, RP 19/98.
[download]
L. T. Santos, J. Schleicher, M. Tygel and P. Hubral,
1998, Seismic Modeling by demigration,
Technical Report, IMECC-UNICAMP, RP 18/98.
[download]
J. Schleicher and M. Tygel, 1998,
A scalar description of elementary waves in isotropic elastic media:
modeling and migration, Technical Report, IMECC-UNICAMP,
RP 83/98.
[download]
M. Tygel, J. Schleicher, P. Hubral and L. T. Santos,
1998, 2.5-D true-amplitude Kirchhoff migration to
zero offset in laterally inhomogeneous media,
Geophysics, vol. 63, no. 2, 557-573.
[download]
A. Novais, L. T. Santos, M. Tygel and B. Ursin,
1997, A unified Born-Kirchhoff representation for
acoustic media, In Hubral, P. (ed.),
Amplitude-preserving seismic reflection imaging. Journal of Seismic
Exploration, vol. 6, 217-226.
[download]
P. Hubral, J. Schleicher and M. Tygel, 1996, A unified approach to 3-D seismic reflection imaging, Part 1: Basic concepts, Geophysics, vol. 61, 742-758. [download]
M. Tygel, J. Schleicher and P. Hubral, 1996,
A unified approach to 3-D seismic reflection imaging, Part 2: Theory,
Geophysics, vol. 61, 759-775.
[download]
P. Hubral, M. Tygel and J. Schleicher, 1995,
Geometrical-spreading and ray-caustic decomposition of elementary
seismic waves, Geophysics, vol. 60, 1195-1202.
[download]
M. Tygel, J. Schleicher and P. Hubral, 1994,
Pulse distortion in depth migration,
Geophysics, vol. 59, 1561-1569.
[download]
P. Hubral, J. Schleicher, M. Tygel and Ch. Hanitzsch,
1993, Determination of Fresnel zones from
traveltime measurements, Geophysics, vol. 58, 703-712.
[download]
P. Hubral, J. Schleicher and M. Tygel, 1993,
Three-dimensional primary zero-offset reflections,
Geophysics, vol. 58, 692-702.
[download]
J. Schleicher, P. Hubral and M. Tygel, 1993,
Geometrical-spreading correction by a dual diffraction stack,
Geophysics, vol. 59, 1870-1873.
[download]
J. Schleicher, M. Tygel and P. Hubral, 1993,
3-D true-amplitude finite-offset migration,
Geophysics, vol. 58, 1112-1126.
[download]
M. Tygel, J. Schleicher, P. Hubral and C. Hanitzsch,
1993, Multiple weights in diffraction stack
migration, Geophysics, vol. 59, 1820-1830.
[download]
M. Tygel, J. Schleicher and P. Hubral, 1992,
Geometrical spreading corrections of offset reflections in a
laterally inhomogeneous earth, Geophysics, vol. 57,
1054-1063.
[download]
P. Hubral, M. Tygel and H. Zien, 1991,
Three-dimensional true-amplitude zero-offset migration,
Geophysics, vol. 56, 18-26.
[download]
J. Schleicher, P. Hubral and M. Tygel, 1991,
Nonspecular reflections from a curved interface,
Geophysics, vol. 56, 1203-1214.
[download]
M. Tygel, H. Huck and P. Hubral, 1991,
Mixed-delay wavelet deconvolution of the point-source seismogram,
Geophysics, vol. 56, 1405-1411.
[download]
M. Tygel, A. Leykam, P. Hubral, W. N. Amorim and R. Pestana,
1991, Transforming a point-source seismogram into
a beam seismogram, Geophysics, vol. 56, 1819-1824.
[download]
P. Hubral and M. Tygel, 1989,
Analysis of the Rayleigh pulse: short note,
Geophysics, vol. 54, 654-658.
[download]
P. Hural and M. Tygel, 1985,
Transient response from a planar acoustic interface by a new
point-source decomposition into plane waves, Geophysics,
vol. 50, 766-774.
[download]
M. Tygel and P. Hubral, 1985,
Transient analytic point-source response of a layered acoustic medium:
Part II, Geophysics, vol. 50, 1478-1487.
[download]
M. Tygel and P. Hubral, 1985,
Transient plane-wave transforms for the point-source seismogram: Short
note, Geophysics, vol. 50, 2889-2893.
[download]
M. Tygel and P. Hubral, 1985,
Transient analytic point-source response of a layered acoustic medium :
Part I, Geophysics, vol. 50, 1466-1477.
[download]
M. Tygel and P. Hubral, 1984,
Transient representation of the Sommerfeld-Weyl integral with
application to the point source response from a planar acoustic interface,
Geophysics, vol. 49, 1495-1505.
[download]