SEAHORSE PARAMETRIC ARRAY FEASIBILITY STUDY

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Authors
  1. Hamm, C.A.
  2. Millan, D.
  3. Fry, J.
  4. Guigne, J.Y.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN);Guigne International Ltd, Paradise NFLD (CAN)
Abstract
In the report the feasibility of configuring a parametric array for use on Defence Research Establishment Atlantic's (DREA) existing Seahorse platform is examined. DREA provided values of seabed scattering strength, noise level, grazing angle, source height, and pulse duration. For primary transmit frequencies 25 kHz and 100 kHz a transmit array was designed, and modelled, to predict sonar performance over the difference frequency range 0.8-10 kHz. A radiated intensity of 2W/cm square is assumed in the calculations to predict source levels and power requirements. Sonar performance is based on received echo level, RL, and the signal-to-noise ratio, SNR. Results indicate the 100 kHz primary provides between 6-15 dB improved SNR over the 25 kHz primary between 0.8-10 kHz, respectively. Furthermore, insonified areas are larger with the 100 kHz primary. The background and possibility of using a sound intensity receiver array is introduced.
Keywords
Parametric arrays;SEAHORSE;Grazing angle
Report Number
DREA-CR-97-405 — Contractor Report
Date of publication
01 Apr 1997
Number of Pages
56
DSTKIM No
97-03298
CANDIS No
503241
Format(s):
Hardcopy;Document Image stored on Optical Disk

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