Effect of Internal Solitary Waves on Mine Detection in the Western Philippine Sea East of Taiwan
Abstract
Upper layer temperature in the western Philippine Sea near Taiwan was sampled using a coastal monitoring buoy with fifteen thermistors attached from July 28 August 7, 2005. Internal waves and internal solitons (IS) were identified using the empirical orthogonal function analysis. Without the IW and IS, the power spectra, structure functions, and singular measures (representing the intermittency) of the temperature field satisfy the power law with multi-scale characteristics at all depths. The IW does not change the basic characteristics of the multifractal structure. However, the IS changes the power exponent of the power spectra drastically, especially in the low wave number domain. It breaks down the power law of the structure function and increases the intermittency parameter. The physical mechanisms causing these different effects need to be further explored further. The Comprehensive Acoustic Simulation System was applied to determine how the IS affect the mine detection by computing the transmission loss (TL) and the ray traces of range-dependent and range-independent cases during the IS period. The maximum TL difference is 20 dB. As a result, the mine detection probability will dramatically be reduced to 1% of the original detection probability.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 2006
- Accession Number
- ADA462544
Entities
People
- Chung-ping Hsieh
Organizations
- Naval Postgraduate School