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    Data adaptive velocity/depth spectra estimation in seismic wide angle reflection analysis

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    Leverette_Thesis (4.685Mb)
    Date
    1977-07
    Author
    Leverette, Steven John  Concept link
    Metadata
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    Citable URI
    https://hdl.handle.net/1912/1718
    DOI
    10.1575/1912/1718
    Keyword
     Seismic refraction method; Seismic waves; Probabilities 
    Abstract
    In studying the earth with reflection seismics, one of the major unknowns is the velocity structure of the medium. Techniques used to determine the velocity structure commonly involve multi-channel arrays which measure the spatial as well as the time structure of the returning signals. The application of a data adaptive technique, the Maximum Likelihood Method, to the problem of estimating seismic velocities is described. The peculiar problems of this application are identified and investigated. The windowing of short duration signals is shown to be an important consideration, and the statistics of the MLM estimator for a single observation of the data set are presented. The adaptive estimator is applied to an ideal covariance matrix, to simulated data, and to field data. The results show the MLM velocity/depth estimator to be a valuable tool in seismic analysis, and the windowing and statistical results should have general applications in a variety of fields.
    Description
    Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy at the Woods Hole Oceanographic Institution and the Massachusetts Institute of Technology July 1977
    Collections
    • Applied Ocean Physics and Engineering (AOP&E)
    • WHOI Theses
    Suggested Citation
    Thesis: Leverette, Steven John, "Data adaptive velocity/depth spectra estimation in seismic wide angle reflection analysis", 1977-07, DOI:10.1575/1912/1718, https://hdl.handle.net/1912/1718
     

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