SAR sea surface simulation method and device
A simulation method and sea surface technology, applied in measurement devices, instruments, and re-radiation, can solve the problems of poor accuracy of SAR sea surface simulation results, and achieve the effect of meeting the needs of effectiveness.
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Embodiment 1
[0065] figure 1 It shows the principle diagram of the method of SAR sea surface simulation in Embodiment 1 of the present application, as figure 1 shown, including:
[0066] Step 101: According to the roughness of the sea surface, use the radar imaging model to obtain the spectrum of the high-frequency micro-scale wave on the sea surface.
[0067] Step 102: According to the spectrum of the high-frequency micro-scale wave on the sea surface, the spectrum solution of the high-frequency micro-scale wave is obtained by using the energy governing equation.
[0068] Step 103: Based on the sea surface temperature function of the upwelling, the ocean front simulation is performed on the spectrum solution of the high-frequency micro-scale wave to obtain the SAR sea surface simulation.
[0069] Further, according to the roughness of the sea surface, the step of obtaining the spectrum of the sea surface high-frequency microscale wave by using the radar imaging model includes:
[0070]...
Embodiment 2
[0131] Figure 4 It shows a schematic diagram of the SST change distribution of the SAR sea surface simulation in the second embodiment of the present application; Figure 4 As shown, the one-dimensional ocean front simulation is used to verify the feasibility of the simulation model, that is, the one-dimensional SST is used for simulation experiments, the seawater temperature, atmospheric temperature, and wind speed are all constant conditions, and only the seawater temperature caused by upwelling is variable t(x ), the one-dimensional SST function is:
[0132] t(x)=1 x
[0133] t(x)=T+k 1 x w1
[0134] t(x)=2 x>w2
[0135] Figure 5 A schematic diagram of the simulation results of NRCS changes caused by SST in the SAR sea surface simulation in the second embodiment of the present application is shown, as Figure 5 As shown, by simulating the condition of the front under the C-band condition, the incident angle of the wave number adopts a medium incident angle (...
Embodiment 3
[0159] Figure 9 Shows the device structure diagram of SAR sea surface simulation in Embodiment 3 of the present application, as Figure 9 As shown, the device may include:
[0160] The spectrum module 901 is used to obtain the spectrum of high-frequency micro-scale waves on the sea surface by using the radar imaging model according to the roughness of the sea surface.
[0161] The spectrum solution module 902 is configured to obtain the spectrum solution of the high-frequency micro-scale wave by using the energy governing equation according to the spectrum of the high-frequency micro-scale wave on the sea surface.
[0162] The simulation module 903 is used for performing ocean front simulation on the spectrum solution of high-frequency micro-scale waves based on the sea surface temperature function of upwelling to obtain SAR sea surface simulation.
[0163] Further, the spectrum module 901 includes:
[0164] Obtain the normalized backscatter cross-section intensity of the ...
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