Correction method of radar calibration errors

Abstract

The invention discloses a correction method of radar calibration errors. The correction method comprises steps of: firstly, selecting two tracks from the same observation target from an ADS-B system and a radar situation graph; further selecting multiple track segments approximate to straight lines from the tracks; by use of the whole least square method based on outlier elimination, carrying out straight line fitting on the track segments; eliminating abnormal points in the track segments; solving an included angle between every fitted straight lines of the same track segment of the radar and the ADS-B; solving an average value for included angles of the track segments, thereby obtaining an included angle average value of two tracks of the target; then, selecting multiple observation targets, and solving the corresponding included angle average value of the two tracks by use of the above method; carrying out averaging calculation on all included angle average values, and finally obtaining a calibration error angle of the radar; and by use of the calibration error angle, compensating an azimuth angle measured by the to-be-corrected radar, thereby finishing the correction on the to-be-corrected radar calibration errors. According to the invention, quantitative analysis and proving are performed through measured data, so the correction method is simple in design, convenient to operate and highly practical, has very obvious correction effects on the radar calibration errors and precision degree of tracking a flight target by the radar is greatly increased.

Description

technical field [0001] The invention relates to the field of electronic equipment calibration, in particular to a radar calibration error correction method. Background technique [0002] The calibration error of the radar is mainly composed of the following two errors: one is that when the radar tracks and measures the target, it usually takes the radar optical axis as the reference and the electrical axis to align with the target, but it is difficult to achieve complete accuracy of the radar optical axis and the electrical axis. There is no deviation in coincidence, and the optical axis and the electrical axis will intersect to form a small angle, that is, the error caused by the inconsistency of the photoelectric axis; second, when the radar is used to calibrate the direction, the steering wheel is often used to calibrate the reverse target, but because the steering wheel There is an error in determining the north itself, so using the steering wheel to calibrate the radar ...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a radar calibration error correction method to solve the problems of large a

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