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2003 Annual Report

A computer generated perspective image of a mathematical function measuring the fit to data between observed and predicted beam power in an infrasound array.

By locating the maximum of the data fit function one can estimate the parameters of the incoming wavefield. Infrasound detection is an important component in monitoring of the comprehensive test ban treaty (CTBT).

Here the maximum is found efficiently with the aid of the neighbourhood algorithm. An inversion technique, developed at RSES, which is rapidly finding applications across a wide range of geophysical inverse problems.

Reference
Signal Parameter Estimation for Sparse Arrays
Kennett, B. L. N, Brown, D. J., Sambridge, M., and Tarlowski, C., Bull. seism.
Soc. Am., 93, No. 4, 1765-1772, August 2003.