The Effects of Reduced Configurations at (LASA) on Detection Signal-to- Noise Ratios

Abstract

The effects of varying the configuration of the Large Aperture Seismic Array (LASA) on the detection signal-to-noise ratio observed in the Seismic Data Analysis Center Detection Processor are discussed. It is shown that a configuration for the LASA of thirteen subarrays (A, B, C, and D rings) with 16 sensors per subarray produces an average loss of 0.2 plus or minus 0.3 db (one standard deviation of the mean) from the current configuration of seventeen subarrays (A, B, C, D, and E rings) using sixteen sensors per subarray. Reducing the number of subarrays to nine (A, B, and C rings) with only 7 elements per subarray produces an average loss of 3.5 plus or minus 0.3 db. These results are in general agreement with known results on variation of noise reduction and signal loss as a function of subarray and subarray sensor selection.

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Document Details

Document Type
Technical Report
Publication Date
May 03, 1974
Accession Number
ADA004991

Entities

People

  • A. C. Chang
  • A. U. Kerr
  • E. F. Chiburis
  • R. O. Ahner

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acquisition
  • Agreements
  • Arrays
  • Contracts
  • Data Acquisition
  • Data Analysis
  • Detection
  • Detectors
  • Earthquakes
  • Noise
  • Noise Reduction
  • Observation
  • Seismic Arrays
  • Standards
  • Travel Time
  • Virginia

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