Advances in Sonar Technology by Edited by: Sergio Rui Silva

By Edited by: Sergio Rui Silva

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Fernandez, J. ; Christoff, J. T. (1997) “High Frequency / Low Frequency Synthetic Aperture Sonar”, Proocedings of SPIE – International Society for Optical Engineering, vol. 2079, pp-160-171, 1997. ; Pihl, J. (2005). , pp. 96-101 Vol. 1, 20-23 June 2005. ; Hua Lee. (1995). 1, 30 Oct-1 Nov 1995. ; Cruz, N. (2007 a). “An In-SAS System For Shallow Water Surveying”, Proceedings of the 7th Geomatic Week, Barcelona, Spain, Feb 2007. ; Cruz, N. (2007 b). 1-7, Sept. 29 2007-Oct. 4 2007. ; Cruz, N. (2008 a).

C τ= (3) The relationship between ground–plane and slant-plane (see lower right figure of Fig. ) is approximated as ΔR g = ΔR s . cos θ g (4) Therefore, two objects on the seafloor are fully resolvable if their ground separation satisfies Δ Rg ≥ cτ . 2 cos θ g (5) Fig. 1. Sonar geometry; (left) One-sided SLS geometry, (right) Time domain representation of a transmitted pulse and corresponding echoes. Through equation (5) the range resolution is directly proportional to the ping duration τ and finer range resolution requires transmission of shorter pulses.

J. (1975), “Comparison of sonar system performance achievable using syntheticaperture techniques with the performance achievable by more conventional means”, The Journal of the Acoustical Society of America, Volume 58, Issue 2, August 1975, pp. 336-348. Douglas, B. ; Lee, H. (1993) “Synthetic-aperture Sonar Imaging with Multiple-element Receiver Array”, IEEE International Conference on Acoustics, Speech, and Signal Processing, vol. 5, pp. 445-448, April 1993. ; Atkins, P. ; Collins, T. (2003) “Robust Underwater Imaging With Fast Broadband Incoherent Synthetic Aperture Sonar”, Proceedings of IEEE International Conference on Acoustics, Speech, and Signal Processing 2003, Volume 5, 2003 pp.

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