Wu LIJUN, FENG RUI=ht. 1989: THE △- TRANSFORM IN SEISMIC TOMOGRAPHY. Acta Seismologica Sinica, 11(2): 170-180.
Citation: Wu LIJUN, FENG RUI=ht. 1989: THE △- TRANSFORM IN SEISMIC TOMOGRAPHY. Acta Seismologica Sinica, 11(2): 170-180.

THE △- TRANSFORM IN SEISMIC TOMOGRAPHY

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  • Published Date: September 01, 2011
  • Based on Radon transform, the △- transform for seismic travel-time inversion is proposed in this paper. We define the linear relationship of model coordinates (x, z), source position △ and seismic ray slope by an equation x = △ + z. The theoretical equations of forward and inverse △- transforms are given, then therelationship between the △- and Fourier transforms is discussed. It is shown in theory that a unique solution can be derived with continuous △- transform.For an incomplete tomographic image reconstruction in seismology, in order to avoid the artificiality and to increase the resolution so as to improve the image quality, the authors give a detailed discussion about the resolution of reconstructed image. Finaly, the influnce of observational system and filter approach upon the reconstruction is discussed through numerical computation.
  • [1] Scudder, H.J., 1978. Introduction to computer aided tomography. Proc. IEEE,66,628——637.

    [2] Aki, k., and P.G., Richards, 1980. Quantitative Seismology: Theory and Dlethods, II, W.H.Freeman and Co..

    [3] Worthington, M.H. ,1984. An introduction to geophysical to gography. First Break, 2,11,20——25.

    [4] Gel'fand LM., M.I. Graev and N. Ya., 1966. Vilenkin Generalised Functions, 5, Integral geometry and representation theory, Academic Press, New York.

    [5] Clayton, R., and G. McMechan, 1981. Inversion of refraction data by wave field continuation. Geophysics, 46, 860——868.

    [1] Scudder, H.J., 1978. Introduction to computer aided tomography. Proc. IEEE,66,628——637.

    [2] Aki, k., and P.G., Richards, 1980. Quantitative Seismology: Theory and Dlethods, II, W.H.Freeman and Co..

    [3] Worthington, M.H. ,1984. An introduction to geophysical to gography. First Break, 2,11,20——25.

    [4] Gel'fand LM., M.I. Graev and N. Ya., 1966. Vilenkin Generalised Functions, 5, Integral geometry and representation theory, Academic Press, New York.

    [5] Clayton, R., and G. McMechan, 1981. Inversion of refraction data by wave field continuation. Geophysics, 46, 860——868.
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