A Radar Surface Object Echo Generation Algorithm Based on Satellite Elevation Data

Abstract

The invention relates to a radar ground object echo algorithm based on satellite elevation data. The algorithm comprises the following steps of determining a center longitude and latitude of a radar deployment position; reading height data; determining a distance resolution of radar; calculating a conversion coefficient of elevation graph data to a radar distance resolution; through the conversioncoefficient, calculating expanded elevation data; expanding an elevation data group under an elevation data array conversion layer polar coordinate; calculating elevation angle data of a distance andan orientation; calculating ground object echo intensities of the distance and the orientation; carrying out beam broadening on the ground object echo intensity of the orientation; carrying out pulsepressure expansion on the ground object echo intensity of the distance; and through a phase superposition mode, fusing air situation information and sending to terminal for displaying. Satellite elevation map data is taken as a basis of ground object echo generation so that echo generation is kept consistent with an actual geography condition. A radar system actual parameter and a radar principleformula are used to process the satellite elevation data so that the echo generation is kept consistent with a radar real equipment phenomenon.

Description

technical field [0001] The invention relates to a radar ground object echo generation algorithm, in particular to a radar ground object echo algorithm based on satellite elevation data, and belongs to the technical field of radar simulation trainers. Background technique [0002] In the field of radar simulation trainer, the simulation corresponding to the echo of radar ground objects is still in a relatively basic stage. Generally speaking, there are two common methods: the first one is the storage data playback method, the ground object echo generated by this method can truly reflect the ground object situation, but there are too few data samples, and it needs to be stored for a long time. The storage space required for the echo data will be very large, and it cannot respond to changes in the deployment position of the radar, which has limitations; the second is pure data simulation, and the ground object echo generated by this method has more advantages than the first. V...

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Problems solved by technology

[0003] In order to solve the above problems, the object of the present invention is to provide a radar surface feature echo algorithm based on satellite elevation data, which uses satellite elevation map data to solve the problem of no realistic basis, and adopts the elevation data rasterization based on geographic location Processing, linear filling, using the principle of radar echo to expand the data in azimuth and distance, and finally fused into the radar echo data by phase superposition, and displaying it, to obtain the radar ground object echo consistent with the radar equipment Phenomenon

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