Experimental estimation of the parameters of a sphere by high-frequency chirped underwater sound pulses

Lazarev, V. A.; Mazannikov, A. A.; Neronov, A. N.; Khil’ko, A. A.

doi:10.1134/s1063771009020092

Cited by 2 publications

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“…The feasibility of the observation method developed in this study is confirmed by the measurements performed in field experiments on the acoustic observation of an object in shallow sea [18]. …”

Section: Discussionsupporting

confidence: 64%

“…After the matched filtering, the spatial regions limited by the formed sounding beam and the lobes of the directivity pattern of the receiving array should be split into a set of elements whose thickness corresponds to the length of the uncertainty function. In this case, a further improvement in the detection of the ellipsoid location can be achieved by selecting the signals corresponding to separate pulse volumes [1,2,6,7,18]. Another way to improve the accuracy of estimating the position of the ellispsoid is the accumulation of tomographic projections [2,6,7].…”

Section: Probability Of Correct Detectionmentioning

confidence: 99%

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Tomography in observation of inhomogenenities in shallow sea during sounding by a focused high-frequency acoustic field: II. Study of the observation efficiency

Smirnov

Khil’ko

2009

Radiophys Quantum El

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UDC 534.26We study the efficiency of high-frequency acoustic sounding of small-size spatially localized inhomogeneities in shallow sea by a tomographic method. The method is based on that the focusing of the received and radiated fields to the region of the assumed location of the inhomogeneity is matched to the waveguide. During the observation, the statistical check is performed for hypotheses on the object location that are formed using a priori information on the waveguide model and data on the observation-system structure. To decrease the influence of the interference structure of the acoustic fields in the waveguide, we use accumulation of partial images corresponding to separate ray tomographic projections. Using a simulation model of the considered method, we analyze its accuracy and sensitivity under different observation conditions in shallow sea.

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Section: Discussionsupporting

confidence: 64%