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The measure of environmental sensitivity in detection performance degradation

Liu Zong-Wei Sun Chao Du Jin-Yan

The measure of environmental sensitivity in detection performance degradation

Liu Zong-Wei, Sun Chao, Du Jin-Yan
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  • Abstract views:  763
  • PDF Downloads:  578
  • Cited By: 0
Publishing process
  • Received Date:  15 August 2012
  • Accepted Date:  20 September 2012
  • Published Online:  20 March 2013

The measure of environmental sensitivity in detection performance degradation

  • 1. Institute of Acoustic Engineering, Northwestern Polytechnical University, Xi’an 710072, China
Fund Project:  Project supported by the Major Basic Project of National Security of China (Grant No. 613110020101) and the National Natural Science Foundation of China (Grant No. 11274252).

Abstract: Existing detection methods have mismatch problem when applyed to the real uncertain ocean, which will lead to the detection performance degradation. However, there has been little work on defining the practical quantitative measures of environmental sensitivity. In this article we define a measure of environmental sensitivity for target detection performance loss in an uncertain ocean for realistic uncertainties in various environmental parameters (water-column sound speed profile and seabed geoacoustic properties). The Monte Carlo approach is used to transfer the environment uncertainty through the forward problem and quantify the resulting variability in the detection performance loss. The computer simulation is based on the Malta Plateau, a well-studied shallow-water region of the Mediterranean Sea. The simulation result shows that 1) the sensitivity is range and depth dependent and in the sound channel the sensitivity is much smaller than in other regions of the ocean; 2) the sound speed profile and the upper seabed layer are most sensitive parameters for the detection performance loss; 3) the sensitivity is frequency dependent. The seabed layer properties such as sediment thickness, density and attenuation coefficient have less influence on the detection as the frequency increases.

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