A FREQUENCY-DOMAIN SYNTHESIS PROCEDURE FOR MULTIDIMENSIONAL MAXIMUM- LIKELIHOOD PROCESSING OF SEISMIC ARRAYS
Abstract
A frequency-domain synthesis method for multidimensional maximum- likelihood filtering of sampled data obtained from seismic arrays is presented. This procedure is shown to possess several advantages relative to the time- domain synthesis technique. The primary advantage is that the frequency-domain method requires approximately ten times less computer time to synthesize the filter than does the time-domain technique. The details of a direct segment method for the spectral matrix estimation required in the frequency-domain approach are presented. In addition, the bias, variance, mean square error, limiting distribution, and other properties of the spectral estimates are discussed. The details of a Fortran IV computer program implementation of the frequency-domain method are given. The experimental results obtained by processing two events recorded at the Large aperture Seismic Array are presented as well as a comparison of the performance of the frequency-domain method relative to the time-domain synthesis technique. It is found that the processed noise power reduction for the frequency-domain method is typically about two out of a total of 20 db worse than that of the time-domain technique.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 06, 1966
- Accession Number
- AD0634233
Entities
People
- Jack Capon
- Robert J. Kolker
- Roy J. Greenfield
Organizations
- Massachusetts Institute of Technology