Interpretation of multipath scintillations Eleuthera to Bermuda in terms of internal waves and tides

Rate-of-phase and intensity spectra due to time-varying multipath interference depend essentially on a single parameter ν2 which can be interpreted as the mean-square rate-of-phase for any typical single path. MIMI 406-Hz phase and intensities are consistent with ν−1=270 and 357 sec for Eleuthera to Bermuda and Eleuthera to midstation transmissions, respectively, compared to 192 and 286 sec from a ray-geometric calculation using an internal wave model based on oceanographic observations. Internal tides play a significant but not dominant role. Subject Classification: [43]30.20, [43]30.35.