A Multichannel Processing Approach to Real Time Network Detection, Phase Association and Threshold Monitoring

Abstract

This paper presents an approach to multichannel processing of data recorded by a network of stations which represents an extension of the delay-and-sum beamforming traditionally applied in array processing. A number of geographical beam-steering points are defined, and for each beam a set of time-aligned traces derived from the network stations are processed together so as to extract, for each step in time, a set of features corresponding to that particular beam. Applying this approach to the network of the three regional arrays NORESS, ARCESS and FINESA in Fennoscandia, we demonstrate its usefulness for associating regional phases detected at individual arrays and originating from the same event. We also give an example of application addressing the problem of continuously monitoring the seismic noise field. Keywords: Network detection; Phase association; Computer systems Threshold monitoring; Regional arrays; Computer networks. (JES)

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Document Details

Document Type
Technical Report
Publication Date
May 31, 1989
Accession Number
ADA213940

Entities

People

  • Frode Ringdal
  • Tormod Kvaerna

Organizations

  • NORSAR

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Algorithms
  • Applied Mathematics
  • Beam Steering
  • Contracts
  • Detection
  • Earth Sciences
  • Geography
  • Geology
  • Geophysics
  • Governments
  • Massachusetts
  • Planetary Sciences
  • Probability
  • Procurement
  • Security
  • United States

Fields of Study

  • Engineering

Readers

  • Computational Modeling and Simulation
  • Phased Array Antenna Design.
  • Seismology