Time-Varying Ocean-Like Surface Scattering at Grazing Incidence: Numerical Analysis of Doppler Spectrum at HF/VHF/UHF Bands

Figure 11

Doppler spectrum of nonlinear waves in different sea states and different operating frequencies. The horizontal axis represents the Doppler frequency normalized by the Bragg frequency , the vertical axis is the wind speed at 10 meters above sea level, and the color depth represents Doppler spectrum intensity.

(a) Creamer waves at 10 MHz

(b) Creamer waves at 60 MHz

(c) Creamer waves at 600 MHz

(d) Lagrange waves at 10 MHz

(e) Lagrange waves at 60 MHz

(f) Lagrange waves at 600 MHz