Fluctuations of the signal reflected by the wave ocean surface
Abstract
Results of experimental observations agree well with calculated data. Studies were made of the amplitude fluctuations and sometimes the phases of the tonal signals with frequencies of 107, 270, 750, and 1500 hertz at distances of several kilometers for the radiator and receivers rigidly attached near the bottom at depths of 0.3-1.4 km. The basic frequency of the 0.10-0.12 hertz fluctuations correspond to the frequency of the peak wave spectrum; the qualitative convergence of the amplitude and wave fluctuation spectra was also noted. Although the multiple reflections from the bottom and the surface obviously were significant, nevertheless these operations permit the conclusion to be drawn of closeness of the frequencies of the peaks of the amplitude and phase fluctuation spectra of the echo and the surface elevation of the ocean in the case of small fluctuations.
- Publication:
-
Acoustics of the Ocean
- Pub Date:
- January 1975
- Bibcode:
- 1975acoc.nasa..118C
- Keywords:
-
- Fluctuation Theory;
- Ocean Surface;
- Signal Reflection;
- Water Waves;
- Correlation Coefficients;
- Energy Spectra;
- Space-Time Functions;
- Acoustics