Asymptotic Analysis of Diierential Semblance for Layered Acoustics
نویسنده
چکیده
Diierential semblance velocity estimators have well-deened and smooth high frequency asymptotics. A version appropriate for analysis of CMP gathers and layered acoustic models has no secondary minima within a sublevel set of velocity prooles, independent of data frequency content, unlike other estimators such as stack power and output least squares. The sublevel set is characterized by the interaction between reeector density and velocity variability.
منابع مشابه
All stationary points of differential semblance are asymptotic global minimizers: Layered acoustics
Differential semblance velocity estimators have well–defined and smooth high frequency asymptotics. A version appropriate for analysis of CMP gathers and layered acoustic models has no secondary minima. Its structure suggests an approach to optimal parametrization of velocity models.
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