Electromagnetic simulation method in space-borne synthetic aperture radar imaging for transmission lines

Abstract

The invention provides an electromagnetic simulation method in space-borne synthetic aperture radar imaging for transmission lines. First, through satellite orbit polynomial fitting and transmission line conductor 3D modeling, the location of a satellite orbit and the location of a conductor corresponding to the radiation center at any time are calculated with high precision; the radiant energy value corresponding to a conductor point target is calculated through SAR geometric imaging and scattering model building; and finally, the final radiant energy value at the center point location of the conductor target is determined through energy radiation superposition. According to the simulation method of the invention, the models used in all steps are mature and precise models with high robustness and accuracy, calculation is highly accurate and accurate, late improvement and maintenance are facilitated, and the method can be easily used in follow-up specific applications; and whether a transmission line conductor is loosened, broken or damaged can be identified, and feasible operation of transmission lines is ensured.

Description

technical field [0001] The invention relates to the field of space-borne synthetic aperture radar remote sensing image processing, in particular to an electromagnetic simulation method for power transmission lines in space-borne synthetic aperture radar imaging. Background technique [0002] In order to grasp the operation status of the line and the environmental conditions along the line, and to find out whether there are defects and potential safety hazards in time, it is necessary to conduct regular inspections on the line. Especially in climate change (fog, ice and snow, strong wind, heavy rain, thunderstorm, etc.), natural disasters (earthquake, flood, mudslide, forest fire, etc.), external damage, abnormal operation and other special circumstances, it is necessary to conduct special inspections in time , to discover and resolve abnormalities in the line. [0003] my country's power transmission lines often stretch for hundreds or even thousands of kilometers, most of ...

AI Technical Summary

Problems solved by technology

[0007] In view of this, the present invention provides an electromagnetic simulation method for power transmission lines in spaceborne synthetic aperture radar imaging, the method is based on the spatial position model of the power transmission wire and the radar backscattering model simulation wire high-resolution SAR image imaging characteristics, It solves the problem of imaging state analysis of transmission line conductors in radar images, and provides theoretical models and simulation algorithms for analyzing the working status and damage of transmission lines

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