00000nam 2200000zi 4500 9.942900 CaOODSP 20240918081939 m o d f cr mn||||||||| 240905e198012##nscad ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre D68-21/4-1980E-PDF Ellis, Dale Douglas, author. NORM2L : an interactive computer program for acoustic normal mode calculations for the Pekeris model / D. D. Ellis ; approved by R. F. Brown. Dartmouth, N.S. : Canada Research and Development Branch, Department of National Defence, Defence Research Establishment Atlantic, December 1980. 1 online resource (iv, 74 pages) : illustrations, graphs. text txt rdacontent computer c rdamedia online resource cr rdacarrier D.R.E.A. technical memorandum ; 80/K Digitized edition from print [produced by Defence Research and Development Canada]. Includes bibliographical references (page 31). "The interactive computer program, NORM2L, calculates the discrete normal modes and acoustic propagation loss for the Pekeris model of the ocean. The Pekeris model is a simple two-layer model in which the two layers represent the seawater and seabed. For many shallow-water environments, the model is a reasonable approximation to the actual physical situation and can be used to investigate acoustic propagation at low frequencies. For ease of future expansion and modification, the program NORM2L is written in modular form in FORTRAN. The results of NORM2L are compared with those of other computer programs"--Abstract, page ii. Includes abstracts in English and French. Underwater acoustics Computer programs. FORTRAN (Computer program language) Acoustique sous-marine Logiciels. Fortran (Langage de programmation) Defence Research Establishment Atlantic, issuing body. D.R.E.A. technical memorandum ; 80/K. (CaOODSP)9.941838 PDF 1.48 MB https://publications.gc.ca/collections/collection_2024/rddc-drdc/D68-21-4-1980-eng.pdf