SEISMIC ARRAYS FOR THE DETECTION OF NUCLEAR EXPLOSIONS
Abstract
Seismic arrays are multichannel sensor patterns immersed in a multi- dimensional signal-noise field and the analytic problem is hence analogous to that of radar antennas. The subject is thus opened first by a review of antenna theory. The general optimization problem for multichannel data leads to large systems of normal equations of Toeplitz form (as presented in previous reports) which require recursion solution techniques to be computationally feasible. Such techniques are elaborated here in terms of polynomials orthogonal on the unit circle. The specific seismic array problem is then considered in terms of plane-wave-front signal and noise contributions plus incoherent noise, and details of the 'velocity filtering' method are presented. Spectral estimation from finite array measurements is the final question considered, including relations between continuous and discrete aperture functions, and the tabulation of aperture functions with their windows.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1964
- Accession Number
- AD0608275
Entities
People
- Enders A. Robinson
Organizations
- Massachusetts Institute of Technology