Preliminary Evaluation of Beam-Steering Capabilities of the TFSO 37- Element Array

Abstract

The evaluation of the beam steering capabilities of the 37-element short-period seismograph array at TFSO indicates that the array provides a signal-to-noise ratio improvement over a single detector of approximately 12 dB at frequencies near 1.0 cps. The phased summed output of the array suppresses the noise by a factor of square root of N (15.6 dB) for frequencies greater than about 1.5 cps. At 1.0 cps, the average noise reduction relative to an individual output is 13.7 dB. The signal amplitude loss in a 30-second P-wave coda is between 1.0 and 2.0 dB in the frequency range of greatest signal power (0.5-1.0 cps).

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Document Details

Document Type
Technical Report
Publication Date
Nov 27, 1968
Accession Number
AD0845599

Entities

People

  • Dale S. Kelley
  • Don R. Phillips

Organizations

  • Geotech Instruments (United States)

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Amplitude
  • Beam Steering
  • Calibration
  • Computer Programs
  • Data Analysis
  • Data Processing
  • Detectors
  • Filters
  • Frequency
  • Government (Foreign)
  • Linear Arrays
  • Measurement
  • Noise Reduction
  • Power Spectra
  • Spectra
  • Steering

Fields of Study

  • Physics

Readers

  • Phased Array Antenna Design.
  • Seismology