An AIS-based radar sea surface target measurement error correction method and system

By acquiring the coordinates of radar targets on the sea surface and AIS targets, the least squares method is used to determine the error coefficients, a rectangular coordinate system is established, and the distance and latitude/longitude errors are estimated and corrected. This solves the measurement error problem of radar when detecting sea surface targets and improves the identification accuracy.

CN115542272BActive Publication Date: 2026-07-24NAVAL AVIATION UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NAVAL AVIATION UNIV
Filing Date
2022-09-30
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

Because the installation normal direction of the antenna array deviates from the set value, the radar will have measurement errors when detecting targets on the sea surface, and will be unable to effectively fuse radar targets and AIS targets, affecting the radar operator's identification and indication of targets on the sea surface.

Method used

By acquiring the coordinates of radar targets on the sea surface and the coordinates of AIS targets, the least squares method is used to determine the error coefficients, a rectangular coordinate system is established, the distance and latitude/longitude errors are estimated, and the position of radar targets on the sea surface is corrected.

Benefits of technology

It improved the accuracy of radar in detecting sea surface targets, solved the measurement error problem, and achieved effective fusion of radar targets and AIS targets.

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Abstract

The present application relates to a kind of radar sea surface target measurement error correction method and system based on AIS.The method comprises: obtaining radar sea surface measurement target and the AIS target corresponding thereto;Error coefficient is determined using least square method according to the above-mentioned target;The distance error of radar sea surface measurement target is estimated according to error coefficient;According to distance error, the corresponding rectangular coordinate system is established;According to the bearing of radar sea surface measurement target and the corresponding rectangular coordinate system, the acute angle obtained by the intersection of the straight line of the position point of the target after correction and the position point of radar sea surface measurement target and the longitude line where radar sea surface measurement target is located is estimated;The latitude and longitude error of radar sea surface measurement target is estimated according to distance error;The position of radar sea surface measurement target is corrected according to the bearing of radar sea surface measurement target and latitude and longitude error.Using the above method can solve the problem of measurement error when radar detects sea surface target, improve the identification accuracy of radar officer to sea surface target.
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