Browsing Reprints by Author "Kuperman, William A."

Now showing items 1-8 of 8

    • Deterministic propagation modelling: Part 1: Fundamental principles *Part 2: Numerical results 

      Kuperman, William A.; Jensen, Finn B. (NATO. SACLANTCEN, 1981/06)
      The physics of sound propagation in the ocean is briefly reviewed. The wave equation is presented and a set of solutions under a variety of approximations is discussed. The consistency among these solutions is illustrated.

    • High frequency matched field processing 

      Hodgkiss, William S.; Kuperman, William A.; Murray, J. J.; D'Spain, Gerald L.; Berger, L. P. (NATO. SACLANTCEN, 1997)
      Results are discussed from a high frequency (0 9-5 7 kHz), very shallow water (<10 m) experiment exploring the feasibility of carrying out matched field processing in this frequency and water depth regime The data was ...

    • High-frequency normal-mode calculations in deep water 

      Ferla, Melchiorre C.; Jensen, Finn B.; Kuperman, William A. (NATO. SACLANTCEN, 1982/10)
      A method has been developed to perform high-frequency deep-water normal-mode calculations in the multikilohertz region in water depths of the order of 5 km. The results from this technique agree with fast field program ...

    • High-speed simulation of an underwater acoustic field using an array processor 

      Kuperman, William A.; Jensen, Finn B.; Martinelli, Giovanna (NATO. SACLANTCEN, 1979/12)
      A computer model PAREQ for simulating the acoustic field of sound propagating in a complicated ocean environment has been installed on a realtime computer system (HP MX21) which includes an array processor (MAP 300). The ...

    • Relative contribution of surface roughness and bottom attenuation to propagation loss in shallow water 

      Kuperman, William A.; Ingenito, Frank (NATO. SACLANTCEN, 1975/10)
      A simulation study has been performed to investigate the relative importance of the contributions of surface roughness and bottom attenuation to propagation loss under differing environmental conditionso The NRL normal ...

    • Sound propagation in a wedge-shaped ocean with a penetrable bottom 

      Jensen, Finn B.; Kuperman, William A. (NATO. SACLANTCEN, 1980/07)
      Modal cutoff during up-slope propagation in a wedge-shaped ocean is studied using the parabolic equation model; theoretical results are compared with some model tank experiments.

    • Spatial correlation of surface-generated noise in a stratified ocean 

      Kuperman, William A.; Ingenito, Frank (NATO. SACLANTCEN, 1980/10)
      A model is developed for the calculation of the spatial properties of the noise field produced in a stratified ocean by the action of wind at the surface. The random noise sources are represented by correlated monopoles ...

    • The optimum frequency of propagation in shallow-water environments 

      Jensen, Finn B.; Kuperman, William A. (NATO. SACLANTCEN, 1983/04)
      The optimum frequency of propagation in shallow water environments is the result of competing propagation and attenuation mechanisms at high and low frequencies. It is shown that the optimum frequency is strongly dependent ...