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

<figure class="figure-group responsive"><div class="sub-figure" id="a"><object data="https://static.hindawi.com/articles/ijap/volume-2019/5363264/figures/5363264.fig.009a.svgz" name="5363264.fig.009a" type="image/svg+xml"></object><div class="fig-label"><b>(a) </b>Wind speed 3 m/s</div></div><div class="sub-figure" id="b"><object data="https://static.hindawi.com/articles/ijap/volume-2019/5363264/figures/5363264.fig.009b.svgz" name="5363264.fig.009b" type="image/svg+xml"></object><div class="fig-label"><b>(b) </b>Wind speed 7 m/s</div></div></figure>

<p>Numerical simulated Doppler spectrum of linear waves over operating frequency. The horizontal axis is the Doppler angular frequency normalized by the Bragg frequency, and the vertical axis represents different simulation operating frequencies from 5 MHz to 400 MHz.</p>

International Journal of Antennas and Propagation

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Figure 9

Figure 9: Time-Varying Ocean-Like Surface Scattering at Grazing Incidence: Numerical Analysis of Doppler Spectrum at HF/VHF/UHF Bands 