Evaluation of infrasonic detection capability for the CTBT/IMS

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Evaluation of infrasonic detection capability for the International Monitoring System of the Comprehensive Test Ban Treaty (IMS/CTBT) is made with respect to signal analysis and global coverage. Signal analysis is anecdotally reviewed with respect to composite power, correlation and F-statistic detection algorithms. In the absence of adaptive pre-filtering, either cross-correlation or F-statistic detection is required. As an unbounded quantity, the F-statistic offers potentially greater sensitivity to signals of interest. With PURE state pre-filtering, power detection begins to become competitive with correlation and F-statistic detection. Additional application of simple post-filters of minimum duration and maximum bearing deviation results in unique positive ... continued below

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12 p.

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Armstrong, W.T.; Whitaker, R.W. & Olson, J.V. September 1, 1996.

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Evaluation of infrasonic detection capability for the International Monitoring System of the Comprehensive Test Ban Treaty (IMS/CTBT) is made with respect to signal analysis and global coverage. Signal analysis is anecdotally reviewed with respect to composite power, correlation and F-statistic detection algorithms. In the absence of adaptive pre-filtering, either cross-correlation or F-statistic detection is required. As an unbounded quantity, the F-statistic offers potentially greater sensitivity to signals of interest. With PURE state pre-filtering, power detection begins to become competitive with correlation and F-statistic detection. Additional application of simple post-filters of minimum duration and maximum bearing deviation results in unique positive detection of an identified impulsive infrasonic signal. Global coverage estimates are performed as a useful deterministic evaluation of networks, offering an easily interpreted network performance, which compliments previous probabilistic network evaluations. In particular, adequate coverage (2 sites), uniform coverage, and redundant coverage (3 to 4 sites) provide figures of merit in evaluating detection, location and vulnerability, respectively. Coverage estimates of the I60 network have been performed which indicate generally adequate coverage for the majority of the globe. Modest increase of station gain (increase of number of elements from 4 to 7) results in significant increase in coverage for mean signal values. Ineffective sites and vulnerability sites are identified which suggest further refinement of the network is possible.

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12 p.

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OSTI as DE96014232

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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: DE96014232
  • Report No.: LA-UR--96-2440
  • Report No.: CONF-9609185--10
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 378791
  • Archival Resource Key: ark:/67531/metadc687899

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • September 1, 1996

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  • July 25, 2015, 2:20 a.m.

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  • Feb. 29, 2016, 9:02 p.m.

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Armstrong, W.T.; Whitaker, R.W. & Olson, J.V. Evaluation of infrasonic detection capability for the CTBT/IMS, article, September 1, 1996; New Mexico. (digital.library.unt.edu/ark:/67531/metadc687899/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.