Vol. 15, no.3, 2023
РусскийEnglish
INFORMATION TECHNOLOGIES
HOLOGRAPHIC METHOD FOR LOCALIZATION OF A MOVING UNDERWATER SOUND SOURCE IN THE PRESENCE OF INTENSE INTERNAL WAVES
Venedikt V. Kuz'kin
Prokhorov Institute of General Physics of Russian Academy of Sciences, http://www.gpi.ru/
Moscow 119991, Russian Federation
E-mail: kumiov@yandex.ru
Sergey A. Pereselkov, Sergey A. Tkachenko, Nikolay V. Ladykin, Mikhail V. Kutsov
Voronezh State University, http://www.vsu.ru/
Voronezh 394006, Russian Federation
E-mail: pereselkov@yandex.ru, sega-th@mail.ru, ladykin.edu@yandex.ru, mkuptsov.edu@yandex.ru
Vladimir I. Grachev
Kotelnikov Institute of Radioengineering and Electronics of RAS, http://www.cplire.ru/
Moscow 125009, Russian Federation
E-mail: grachev@cplire.ru
Received July 04, 2023, peer-reviewed July 11, 2023, accepted July 18, 2023
Abstract: Within the framework of a numerical experiment, the holographic processing of noise emission from a moving underwater sound source in the presence of intense internal waves, which cause horizontal refraction of sound field waves, is considered. The interference of the undisturbed and disturbed fields forms a moiré interference pattern (interferogram) that masks the interferogram of a noise source. Registration of a moiré interferogram using a two-dimensional Fourier transform makes it possible to separate the spectral densities of the unperturbed and perturbed fields. This makes it possible to reconstruct the interferogram of the unperturbed field in the presence of intense internal waves. The relative error of its reconstruction is estimated. The errors in reconstructing the range and radial velocity of the source due to horizontal refraction are analyzed.
Keywords: shallow sea, interferogram, hologram, intense internal waves, horizontal refraction, moving sound source
UDC 004.052.34
RENSIT, 2023, 15(1):317-326e DOI: 10.17725/rensit.2023.15.317
Full-text electronic version of this article - web site http://en.rensit.ru/vypuski/article/507/15(3)317-326e.pdf