Estimates of infrasonic array gain patterns

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Infrasonic array gain patterns are discussed and estimated for the infrasonic frequency range and array geometries under consideration by the Conference on Disarmament in the International Monitoring System (IMS). The larger array spacing being considered for the IMS infrasonic arrays is found to be appropriate in maintaining directivity of the steered beam at lower frequencies. A modestly filled array is found to offer great improvement in narrow band side- lobe suppression at higher frequencies, allowing the benefit of greater directivity of the steered beam at these higher frequencies. Narrow band side-lobe suppression is considered of importance in mitigating frequent, naturally ... continued below

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8 p.

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Armstrong, W.T. & Whitaker, R.W. October 1, 1996.

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Infrasonic array gain patterns are discussed and estimated for the infrasonic frequency range and array geometries under consideration by the Conference on Disarmament in the International Monitoring System (IMS). The larger array spacing being considered for the IMS infrasonic arrays is found to be appropriate in maintaining directivity of the steered beam at lower frequencies. A modestly filled array is found to offer great improvement in narrow band side- lobe suppression at higher frequencies, allowing the benefit of greater directivity of the steered beam at these higher frequencies. Narrow band side-lobe suppression is considered of importance in mitigating frequent, naturally occurring `micro-barom` signals in the southern hemisphere.

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8 p.

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OSTI as DE96014233

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  • 18. Seismic Research symposium on monitoring a Comprehensive Test Band Treaty (CTBT), Annapolis, MD (United States), 4-6 Sep 1996

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  • Other: DE96014233
  • Report No.: LA-UR--96-2439
  • Report No.: CONF-9609185--14
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 402293
  • Archival Resource Key: ark:/67531/metadc675974

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Office of Scientific & Technical Information Technical Reports

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  • October 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 25, 2016, 4:26 p.m.

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Armstrong, W.T. & Whitaker, R.W. Estimates of infrasonic array gain patterns, article, October 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc675974/: accessed December 16, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.