Three-coordinate air radar height measurement value correction method based on joint estimation

Through the method based on joint estimation, a joint solution model for relative height error is established, which solves the problem of inaccurate measurements of the altitude of the three-coordinates for the air radar, and effectively corrects the altitude measurements and improves the accuracy.

CN120044484APending Publication Date: 2025-05-27CHINESE PEOPLES LIBERATION ARMY UNIT 93209
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Patent Information

Application Number
CN202411974031.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2025-05-27

AI Technical Summary

Technical Problem

The three-coordinate air radar has systematic errors in pitch angle and distance measurement, resulting in inaccurate height measurement values, affecting the effect of target correlation recognition and data fusion.

Method used

Using a joint estimation method, the observation data of the same air target is selected by selecting the main station and auxiliary station radar, three-dimensional uniform angle coordinate conversion, linear parameter estimation and time registration point calculation, a joint solution model for height relative system error is established, and the reliability of the error accumulation estimation result is ensured through singular value removal.

Benefits of technology

The altitude measurement value of the auxiliary station radar was effectively corrected, significantly reducing the average difference of the track height value, improving the radar altitude estimation and fusion accuracy, and meeting the needs of engineering practice.

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Abstract

The invention relates to a three-coordinate air radar height measurement value correction method based on joint estimation, and belongs to the technical field of multi-radar data fusion. According to the method, a relative system error thought is adopted, observation data of main and auxiliary station radars on a typical air route target are selected, and a height relative system error joint calculation model derived from radar asynchronous measurement data is established through three-dimensional unified rectangular coordinate conversion, linear parameter estimation, time registration point calculation and the like; and the reliability of an error accumulation estimation result is ensured through operations such as singular value elimination. Experimental results show that the follow-up height measurement value of the auxiliary station radar is corrected according to the cumulative estimation result, the average difference of the height values of the track lines is reduced by one order of magnitude, the error correction effect is very ideal, and the requirements for air radar height estimation and fusion precision in engineering practice are met. The estimation method provided by the invention is scientific, reasonable in scheme implementation steps and very high in operability and practicability.
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