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040 |aCaOODSP|beng|erda|cCaOODSP
0410 |aeng|beng|bfre
0861 |aD68-21/51-1996E-PDF
1001 |aCraig, David W. |q(David William),|d1955- |eauthor.
24510|aComputing ship resolution gain for horizontal towed arrays / |cDavid W. Craig ; approved by C.W. Bright.
264 1|aDartmouth, N.S. : |bNational Defence, Research and Development Branch = Défense nationale, Bureau de recherche et développement : |bDefence Research Establishment Atlantic = Centre de recherches pour la défense Atlantique, |cMarch 1996.
300 |a1 online resource (iv, 18 pages) : |bgraphs.
336 |atext|btxt|2rdacontent
337 |acomputer|bc|2rdamedia
338 |aonline resource|bcr|2rdacarrier
4901 |aTechnical memorandum ; |v96/211
500 |aDigitized edition from print [produced by Defence Research and Development Canada].
504 |aIncludes bibliographical references (page 8).
5203 |a"Prediction of sonar performance is an essential step in the design and development of large sonar systems. The sonar equation is most often used to predict detection performance, assuming constant mean values for signal and noise. Unfortunately, this analysis fails to account for changes in mean signal and noise conditions that may vary over hours, days or months. In the case of shipping noise and a horizontal towed array, the mean noise background may vary dramatically as ships move in and out of the main lobe of the beam pattern of a receiver. This report shows that computing probability density functions for actual receiver beam patterns, as well as imposing a constant ambient noise background over individual ship interferers, greatly alters Ship Resolution Gain (SRG) estimates. This is particularly true at low shipping densities, where the difference in SRG estimates may approach 30 dB. Lower SRG estimates are likely more representative of realistic ocean environments"--Abstract, page ii.
546 |aIncludes abstracts in English and French.
650 0|aUnderwater acoustics|xMeasurement.
650 0|aUnderwater acoustics|xComputer programs.
650 6|aAcoustique sous-marine|xMesure.
650 6|aAcoustique sous-marine|xLogiciels.
7102 |aDefence Research Establishment Atlantic, |eissuing body.
7101 |aCanada. |bDepartment of National Defence. |bResearch and Development Branch, |eissuing body.
830#0|aD.R.E.A. technical memorandum ;|v96/211.|w(CaOODSP)9.941838
85640|qPDF|s970 KB|uhttps://publications.gc.ca/collections/collection_2025/rddc-drdc/D68-21-51-1996-eng.pdf