Browsing CMRE Publications by Author "Berrou, Jean-Louis"
Now showing items 1-6 of 6
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A real time system for towed array calibration and performance analysis, or how to get 50 dB sidelobes from a towed array
Berrou, Jean-Louis; Bluy, Orest Z.; Wagstaff, Ronald A. (NATO. SACLANTCEN, 1982/06)Sidelobe suppression levels of 30 dB for a towed array are generally considered excellent; values above that are considered exceptional or unachievable. However, 40 t o 50 dB suppression levels have been achieved and ... -
Application of beam-forming techniques to measurements of acoustic scattering from the ocean
Berkson, Jonathan M.; Kloosterman, Hendrik J.; Akal, Tuncay; Berrou, Jean-Louis (NATO. SACLANTCEN, 1986/10)Signals from an explosive source backscattered from the seafloor and received at long range by -
Directional measurements of low-frequency acoustic backscattering from the seafloor
Berkson, Jonathan M.; Akal, Tuncay; Kloosterman, Hendrik J.; Berrou, Jean-Louis (NATO. SACLANTCEN, 1986/06)Long-range, low-frequency directional measurements of acoustic backscattering from the seafloor were made in the Tyrrhenian Sea using explosi ve sound sources. The signals were received by a horizontal towed array of ... -
Is power averaging the best estimator for undersea acoustic data?
Wagstaff, Ronald A.; Berrou, Jean-Louis (NATO. SACLANTCEN, 1982/06)The power average is the statistic which is commonly used in all types of acoustic data processing. It is an excellent estimator for "well behaved" Gaussian distributions when the central or average value is desired. ... -
Use of the towship for assessing towed-array performance and analyzing data quality
Wagstaff, Ronald A.; Berrou, Jean-Louis; Cotaras, Frederick D. (NATO. SACLANTCEN, 1982/11)A series of relatively simple tests are presented and discussed, which used in conjunction with the noise received from the towship, can be used in real time to assess the performance of a towed array and the quality of ... -
Virtual beams from an FFT beamformer and their use to assess the quality of a towed-array system
Berrou, Jean-Louis; Wagstaff, Ronald A. (NATO. SACLANTCEN, 1983/01)Linear towed arrays with sophisticated signal processing systems have become popular for passive sonar and seismic prospecting. This is due to the ease of mobility and the large spatial gains achievable. However, because ...