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

Figure 6

Comparison of Doppler spectrum between the numerical simulation and the SPM in different sea states. The frequency is 10 MHz and the sea surfaces are linear. The Doppler frequency is normalized by the Bragg frequency , and the spectral intensity is normalized by Bragg peak.

(a) Wind speed 5 m/s

(b) Wind speed 10 m/s

(c) Wind speed 15 m/s

(d) Wind speed 20 m/s