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    • A note on convergent zones 

      Goodman, Ralph R.; Duykers, Ludwig R. B. (NATO. SACLANTCEN, 1962/02)
      An exact solution for ray paths near a sound channel with parabolic velocity profile is given for rays crossing the sound channel axis at small angles. The convergent zone for such rays for a source on axis is compared ...
    • 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.