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.

Active Publication Date: 2020-04-24
ZHEJIANG OCEAN UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0004] The embodiment of this application proposes a SAR sea surface simulation method and device to solve the technical problem of poor accuracy of existing SAR sea surface simulation results

Method used

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  • SAR sea surface simulation method and device
  • SAR sea surface simulation method and device

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Experimental program
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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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Abstract

The invention provides an SAR sea level simulation method and device and belongs to the SAR field. The method comprises steps that according to sea level roughness, a radar imaging model is utilized to acquire wave spectrum of sea level high frequency micro scale waves; according to the wave spectrum of the sea level high frequency micro scale waves, an energy control equation is utilized to acquire a wave spectrum solution of the high frequency micro scale waves; based on a sea level temperature function of an upwelling current, sea sharp side simulation of the wave spectrum solution of the high frequency micro scale waves is carried out to acquire SAR sea level simulation. The method is advantaged in that a technical problem of relatively poor accuracy of the SAR sea level simulation result existing in the prior art is solved, and thereby sea level simulation validity demands of users can be satisfied.

Description

technical field [0001] The present application relates to the technical field of synthetic aperture radar (SAR: Synthetic Aperture Radar), in particular to a SAR sea surface simulation method and device. Background technique [0002] Upwelling refers to an ocean phenomenon in which seawater moves vertically from the deep layer to the shallow layer of the sea surface. It is generally believed that the driving force of the wind is the source of power for the upwelling. The existence of the upwelling can bring the rich nutrients in the deep water to the shallow sea surface, thereby promoting the photosynthesis of plankton. Therefore, under normal circumstances, the upwelling sea area has higher primary productivity, and higher primary productivity can often promote the formation of fisheries. The Peruvian fishery in South America and the Zhoushan fishery in China are both located in the upwelling sea area. Research shows that five major upwelling fisheries, covering just 5 per...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/90G01S7/40
CPCG01S7/4052G01S13/904G01S13/90
Inventor 邵伟增李欢孙展凤
Owner ZHEJIANG OCEAN UNIV
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