JI Guiha1,2,3  LI Zhenglin1,2  DAI Qiongxin2

(1 National Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences  Beijing 100190)

(2 Haikou Lab, Institute of Acoustics, Chinese Academy of Sciences Haikou  570105)

(3 Graduate University of Chinese Academy of Sciences  Beijing 100190 )

Received Sept. 5, 2008

Revised Oct. 13, 2008

Abstract Effects of linear and solitary internal waves on the temporal correlation of matched-field processing (MFP) in shallow water are numerically investigated for acoustic sources with different frequencies and depths based on oceanographic data from an experiment. It is shown that the temporal correlation of MFP decreases as the amplitude of solitary internal waves or the average energy density of linear internal waves increases. For acoustic source with lower frequency or located below the thermocline, the temporal correlation of MFP is less affected by internal waves, and the temporal correlation length of MFP is longer. Moreover, the effects of the range from solitary internal waves to acoustic source on the temporal correlation of MFP are relatively small. 　

PACS numbers: 43.30