Archives of Acoustics, 45, 4, pp. 709–720, 2020
10.24425/aoa.2020.135277

Impact of Spatial Noise Correlation on Bearing Accuracy in DIFAR Systems

Mariusz RUDNICKI
Gdańsk University of Technology
Poland

Jacek MARSZAL
Gdańsk University of Technology
Poland

Roman SALAMON
Gdańsk University of Technology
Poland

DIFAR type underwater passive systems are one of the more commonly used tools for detecting submarines. At the design stage, which usually uses computer simulations, it is necessary to generate acoustic noise of the sea. It has been shown that correlating noise significantly reduces these errors compared to the assumption that noise is uncorrelated. In addition, bearing errors have been shown to be the same in systems with a commonly used antenna containing five hydrophones, as in a system without a central hydrophone, which may be useful in some DIFAR system design solutions.
Keywords: underwater noise; noise correlation; DIFAR sonobuoys; bearing accuracy
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References

Barclay D.R., Buckingham M.J. (2014), On the spatial properties of ambient noise in the Tonga Trench, including effects of bathymetric shadowing, The Journal of the Acoustical Society of America, 136(5): 2497–2511, doi: 10.1121/1.4896742.

Barclay D.R., Buckingham M.J. (2016), Depth dependence of wind-driven, broadband ambient noise in the Philippine Sea, The Journal of the Acoustical Society of America, 133(1): 62–71, doi: 10.1121/1.4768885.

Buckingham M.J. (2012), Cross-correlation in band-limited ocean ambient noise fields, The Journal of the Acoustical Society of America, 131(4): 2643–2657, doi: 10.1121/1.3688506.

Buckingham M.J. (2011), On the two-point cross-correlation function of anisotropic, spatially homogeneous ambient noise in the ocean and its relationship to the Green’s function, The Journal of the Acoustical Society of America, 129(6): 3562–3576, doi: 10.1121/1.3573989.

Burdick W.S. (1984), Underwater Acoustic System Analysis, Prentice-Hall, Englewood Cliffs, NJ.

Cox H. (1973), Spatial correlation in arbitrary noise fields with application to ambient sea noise, The Journal of the Acoustical Society of America, 54(5): 1289–1301, doi: 10.1121/1.1914426.

Cron B.F., Sherman C.H. (1962), Spatial‐correlation functions for various noise models, The Journal of the Acoustical Society of America, 34(11): 1732–1736, doi: 10.1121/1.1909110.

Greene Jr. C.R, McLennan M.W., Norman R.G. (2004), Directional frequency and recording (DIFAR) sensors in seafloor recorders to locate calling bowhead whales during their fall migration, The Journal of the Acoustical Society of America, 116(2): 799–813, doi: 10.1121/1.1765191.

Grelowska G., Kozaczka E., Kozaczka S., Szymczak W. (2013), Underwater noise generated by small ships in the shallow sea, Archives of Acoustics, 38(3): 351–356. doi: 10.2478/aoa-2013-0041.

Klusek Z. (2011), Ambient sea noise in the Baltic Sea – review of investigations, Hydroacoustics, 14: 75–82.

Klusek Z., Lisimenka A. (2016), Seasonal and diel variability of the underwater noise in the Baltic Sea, The Journal of the Acoustical Society of America, 139(4): 1537–1547, doi: 10.1121/1.4944875.

Kochańska I., Nissen I., Marszal J. (2018), A method for testing the wide-sense stationary uncorrelated scattering assumption fulfilment for an underwater acoustic channel, The Journal of the Acoustical Society of America, 143(2): EL116–EL120, doi: 10.1121/1.5023834.

Kozaczka E., Grelowska G. (2011), Shipping low frequency noise and its propagation in shallow water, Acta Physica Polonica A, 119(6A): 1009–1012, doi: 10.12693/APhysPolA.119.1009.

Mallet A.L. (1975), Underwater Direction Signal Processing System, US Patent No 3,870,989.

Marage J.P., Mori Y. (2010), Sonar and Underwater Acoustics, ISTE Ltd, London UK, and John Wiley & Sons, Inc., NJ, USA.

Marszal J., Salamon R., Stepnowski A. (2005), Military sonar upgrading methods developed at Gdansk University of Technology, Proceedings of the IEEE Oceans'05 Europe Conference, Brest, France, Vol. 1, pp. 489–494, doi: 10.1109/OCEANSE.2005.1511763.

McDonald M.A. (2004), DIFAR Hydrophone Usage in Whale Research, Proceedings of the Acoustics Week in Canada, 32(2): 155–160, https://jcaa.caa-aca.ca/index.php/jcaa/article/view/1599.

Miller B.S. (2012), Real-time tracking of blue whales using DIFAR sonobuoys, Proceedings of Acoustics 2012, Fremantle, Australia, 7 pages.

Ren C., Huang Y. (2020), A spatial correlation model for broadband surface noise, The Journal of the Acoustical Society of America, 147(2): EL99–EL105, doi: 10.1121/10.0000710.

Roux P., Sabra K.G., Kuperman W.A., Roux A. (2005), Ambient noise cross correlation in free space: Theoretical approach, The Journal of the Acoustical Society of America, 117(1): 79–84, doi: 10.1121/1.1830673.

Rudnicki M., Marszal J. (2016), Signal conditioning for examination of shallow-water acoustic noise correlation properties, Hydroacoustics, 19: 335–340.

Salamon R. (2004), A directional sonobuoy system for submarine detection, Hydroacoustics, 7: 195–208.

Salamon R. (2006), Sonar systems [in Polish], Gdanskie Towarzystwo Naukowe, Gdansk, Poland.

Salamon, R., Marszal, J., Raganowicz, A., Rudnicki M. (2000), Application of Fourier transformation in a passive sonar with gradient hydrophones, Proceedings of the Fifth European Conference on Underwater Acoustics ECUA 2000, Lyon, France 10–13 July 2000; Vol. 2, pp. 1115–1120.

Schmidt J.H., Schmidt A., Kochańska I. (2018), Multiple-input multiple-output technique for underwater acoustic communication system, Proceedings of 2018 Joint Conference – Acoustics, Ustka, Poland, 2018, IEEE Xplore Digital Library, pp. 280–283. doi: 10.1109/acoustics.2018.8502439.

Stover H.A. (1969), Advanced Direction Finding Sonobuoy System, US Patent No 3,461,421.

Urick R.J. (1983), Principles of Underwater Sound, 3rd Ed., Peninsula Pub.

Urick R.J. (1986), Ambient Noise in the Sea, 2nd Ed., Peninsula Pub.

Yang Q., Yang K., Cao R., Duan S. (2018), Spatial vertical directionality and correlation of low-frequency ambient noise in deep ocean direct-arrival zones, Sensors, 18(2): 319, doi: 10.3390/s18020319.

Zhou J., Piao S., Huang, Y.; Zhang S., Qu K. (2017), A spatial correlation model for the horizontal non-isotropic ocean ambient noise vector field, Journal of Low Frequency Noise, Vibration and Active Control, 36(2): 124–137, doi: 10.1177/0263092317711984.




DOI: 10.24425/aoa.2020.135277

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