DESIGN SEISMIC ARRAYS FOR EFFICIENT ON-LINE BEAMFORMING

Abstract

The signal-to-noise ratio improvement obtained with delay-and-sum (DS) processing is discussed for short-period seismic data. It is shown that at least 3 km spacing should be maintained between seismometers at the Large Aperture Seismic Array (LASA) or at another site with a similar noise environment. It is shown that noise coherency measurements are of use in determining the sensor spacing at a new array location. The parameters required for a site survey coherency measurement, such as length of data and resolution, are also presented. The design of subarrays of approximately 20 km aperture is described and array patterns are given.

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Document Details

Document Type
Technical Report
Publication Date
Jun 27, 1967
Accession Number
AD0655142

Entities

People

  • J. Capon
  • R. J. Greenfield
  • R. T. Lacoss

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Arrays
  • Confidence Limits
  • Degradation
  • Department Of Defense
  • Frequency
  • Frequency Bands
  • Measurement
  • Noise
  • Noise Reduction
  • Peak Power
  • Plane Waves
  • Power
  • Seismic Arrays
  • Seismometers
  • Spectra
  • Surveys
  • Waves

Fields of Study

  • Engineering
  • Physics

Readers

  • Phased Array Antenna Design.
  • Seismology

Technology Areas

  • Space
  • Space - Space Objects