Efficient simulation algorithm for influence of terrain occlusion on GNSS interference source action area

Abstract

The invention provides a high-efficiency simulation algorithm for influence of terrain occlusion on GNSS interference source action areas. The high-efficiency simulation algorithm comprises the following steps: firstly, determining the number of GNSS interference sources and position coordinates and configuration parameters of each GNSS interference source; determining a to-be-analyzed region of each GNSS interference source according to the configuration parameters of each GNSS interference source; then, in the to-be-analyzed area of each GNSS interference source, adopting a visual domain analysis method based on a reference surface to judge the interference condition of each target point in the to-be-analyzed area of each GNSS interference source to obtain an action area of each GNSS interference source; and finally, splicing all GNSS interference source action areas according to longitude and latitude to obtain a multi-GNSS interference source action area influenced by terrain shielding. On the premise of ensuring the calculation accuracy, the problem that the calculation time is long when the influence of terrain occlusion on a GNSS interference source is analyzed by adopting asight visual range analysis algorithm in the prior art is solved.

Description

technical field [0001] The present invention relates to the technical field of optimal deployment of GNSS interference sources, and more particularly to a method, medium and system for calculating the action area of ​​GNSS interference sources affected by terrain occlusion. Background technique [0002] In the simulation of the effectiveness of satellite navigation countermeasures, it is necessary to calculate the influence of terrain occlusion in the real geographical environment on the area of ​​action of GNSS interference sources. The GNSS interference source area is not only affected by its own parameters such as its transmit power and transmit antenna gain, but also by the real atmosphere, earth curvature, terrain and other environments. The parameters of the GNSS interference source itself, the parameters of the receiver and the curvature of the earth determine the maximum area of ​​action of the GNSS interference source. The two-dimensional display of the ground surfa...

AI Technical Summary

Problems solved by technology

The parameters of the GNSS interference source itself, the parameters of the receiver and the curvature of the earth determine the maximum area of ​​action of the GNSS interference source. The two-dimensional display of the ground surface is circular, but after considering the real terrain occlusion, the area of ​​action will be irregular

[0003] Visible domain analysis is a common method to study the influence of terrain occlusion on the GNSS interference source area. Usually, the visual domain analysis method based on line of sight is used to judge the interference situation of the area, but this method requires a large amount of calculation. When the area is large When it is large, the calculation time will be longer

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