Abstract
This paper investigates the intensity variation with time of a broadband signal in the presence of moving solitary internal waves. The auto-correlation of the received impulse responses summed over a vertical line array of receivers (the so called Q function) is measured from the SWARM95 data using broadband pulses received on the NRL array at a range ∼42 km from the source. The signals are m-sequences centered at 400 Hz with a bandwidth of 100 Hz. The peak of the Q function shows a periodicity of 0.042 cycles/min, with a value changing with time depending on the position of the internal wave packets. Coupled mode equation is used to calculate mode coupling induced by the solitary internal waves and explain the observed periodicity of the intensity fluctuations. The results suggest that the positions and some parameters of the solitary waves could be remotely estimated from underwater sensors. [Work supported by the Office of Naval Research.]
Published Version
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