Wind Wave Studies: Part 1. Doppler Spectra
NAVAL RESEARCH LAB WASHINGTON DC
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Previous measurements of doppler spectra in microwave backscattering in a wind wave tank at 9.375 and 23.9 GHz have been extended to 70.1 GHz at a 3- m fetch and to longer fetches and higher winds at the lower microwave frequencies. The development of the doppler spectra with fetch and windspeed leads to the indentification of three scattering wave systems. At high angles, the dominant wind waves are the dominant scatterers the scatterers at the lower angles comprise wave systems which are respectively bound to and free of the dominant wave. The free waves are treated as a perturbation of the wind drift, and the relation of free-wave growth to the wave-breaking process is discussed.
- Physical and Dynamic Oceanography
- Fluid Mechanics
- Radiofrequency Wave Propagation