TFO and UBO Long-Period Array Data Analysis

Abstract

Results of the analysis of two long-period noise samples from Tonto Forest Seismological Observatory (TFO) and three from Uinta Basin Seismological Observatory (UBO) are presented. Analysis methods include single channel power density spectra, determination of multichannel coherences, and computation of two-dimensional frequency-wavenumber spectra. Results are compared to results obtained earlier from the Montana Large Aperture Seismic Array; the noise fields at the three sites are found to be generally similar. Comparison of array processing methods for the UBO and TFO data indicate that little more than 2 db noise suppression improvement above the 6-7 db obtainable by beamsteer processing can be expected from multichannel filter processing. There is some evidence of acoustically coupled low-frequency propagating noise in the TFO data.

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Document Details

Document Type
Technical Report
Publication Date
Aug 12, 1970
Accession Number
AD0875070

Entities

People

  • Gary D. Mcneely

Organizations

  • Texas Instruments

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Air Force
  • Arrays
  • Computations
  • Contracts
  • Data Analysis
  • Data Processing
  • Fourier Transformation
  • Frequency
  • Frequency Domain
  • Government (Foreign)
  • Information Science
  • Observatories
  • Rayleigh Waves
  • Seismic Arrays
  • Two Dimensional
  • Waves

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Seismology