Target scattering cross section calculation method and device
A target scattering and cross-section technology, applied in radio wave measurement systems, instruments, etc., can solve problems such as insufficient calculation accuracy and limited application range
Pending Publication Date: 2021-01-12
XIAN INSTITUE OF SPACE RADIO TECH
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Although the calculation speed of this method is fast, the calculation accuracy is not high enough, ignoring the contribution of scattering mechanisms such as multiple scattering and edge diffraction between bins, and the scope of application is limited. As the accuracy required for deep space exploration is getting higher and higher, The carrier frequency and bandwidth are getting bigger and bigger, the detection environment is getting more and more complex, and higher requirements are put forward for the design of ranging and speed measuring sensors. calculation method
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[0129] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0130] refer to figure 1 , shows a flow chart of steps of a method for calculating a target scattering cross section provided by an embodiment of the present invention, as shown in figure 1 As shown, the method may specifically include the following steps:
[0131] Step 110: Determining a three-dimensional geometric environmental electromagnetic model of the planet's surface.
[0132] Use an optical camera or other means to obtain the three-dimension...
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The invention provides a target scattering cross section calculation method and device, and the method comprises the steps: determining a three-dimensional geometric environment electromagnetic modelof a planet surface; determining multiple scattering contribution values among the surface elements; determining a scattering contribution value of edge diffraction of the three-dimensional geometricelectromagnetic model; determining an electromagnetic scattering contribution value of the surface current of the three-dimensional geometric electromagnetic model; synthesizing the multiple scattering contribution values between the surface elements, the scattering contribution values of the edge diffraction and the electromagnetic scattering contribution values into contribution values of coherent scattering components; determining an incoherent electromagnetic scattering contribution value; and superposing the contribution value of the coherent scattering component and the non-coherent electromagnetic scattering contribution value to obtain a target scattering cross section of the three-dimensional geometrical environment electromagnetic model. According to the method, the problems thatmultiple scattering and edge diffraction are ignored, the application range is limited and the calculation precision is not high enough when the target scattering cross section is calculated by an existing method are solved.
Description
technical field [0001] The invention relates to the technical field of space microwave remote sensing, in particular to a method and device for calculating a target scattering cross section. Background technique [0002] In the exploration of planets such as the moon, Mars, and asteroids, the ranging and velocity sensor is an important payload of the lander, which determines whether the lander can reach the designated detection area with high precision and high reliability. The current working frequency band has reached the Ka band. The range-measuring and speed-measuring sensor mainly receives the echo scattered by the planet, and interprets and processes the echo to obtain important parameter information such as the distance and speed of the lander relative to the planet. Among them, the target scattering cross-section is an important parameter of the planet echo . [0003] The traditional method for calculating the scattering cross-section of a planetary surface target i...
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IPC IPC(8): G01S7/41
CPCG01S7/418G01S7/415G01S7/414
Inventor 陈刚贺亚鹏党红杏苏翔郑适刘丽霞李浩
Owner XIAN INSTITUE OF SPACE RADIO TECH