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Method for estimating radar system error

A radar system and error estimation technology, applied in radio wave measurement systems, instruments, etc., to solve problems such as unsatisfactory system error calibration

Inactive Publication Date: 2011-10-19
NO 709 RES INST OF CHINA SHIPBUILDING IND CORP
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Problems solved by technology

The existing systematic error estimation methods, such as real-time quality control method, maximum likelihood method, least squares method or generalized least squares method, etc., all believe that the systematic error is a constant function of the whole detection area, causing the system error in most cases Bad error calibration

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  • Method for estimating radar system error

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Embodiment Construction

[0056] Below in conjunction with accompanying drawing and example the present invention is described in further detail.

[0057] The present invention is a system error estimation method based on cooperative target information sources, figure 1 Provided is the system error estimation method flow chart, in one embodiment of the present invention, adopts the radar system error estimation method in the present invention, utilizes the AIS data reported by civilian ships and the detection data of two-coordinate radar A to civilian ships, and The target batch number comparison table between the two is used to estimate the systematic error. Among them, the area to be estimated is a fan-shaped area with the radar as the center, the distance range is 40-120 kilometers, and the azimuth range is 30-210 degrees. The unit is unified as the International System of Units. correspond figure 1 The flow chart shown, the specific implementation steps are as follows:

[0058] Step 1 Meshing

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Abstract

Provided is a method for estimating radar system error. The method comprises: (1) dividing grids; (2) dividing node data sets; (3) receiving target data; (4) determining the kind of the data received; (5) storing radar measurement data received; (6) determining whether high precision source data has a corresponding radar object batch number or not; (7) registering time; (8) calculating the error and variance of the new radar system; (9) searching the nodes new data pairs subject to; (10) determining whether the node set the new data pairs subject to is empty or not; (11) calculating the radar system error at the node; (12) calculating a grid system error function; (13) calculating system error of an area to be estimated. The advantages are: according to the invention, a value method is adopted to obtain the area distribution the system error and the estimation precision is improved because the system error estimation method driven by data overcomes the difficulties that the radar system error model is complex and the radar system error model is hard to be established; a grid node iterative computation and a grid bilinear function interpolation are adopted, so the computational complexity is less and the engineering enforcement is convenient. The invention can be used for the radar system error calibration of a shore-based system.

Description

technical field [0001] The invention relates to a method for estimating radar system errors, which is a method for estimating radar system errors using high-precision source data, and is used for estimating system errors with two / three-dimensional detection data of radar, active sonar, and photoelectric integrated equipment. and calibration, belonging to the technical field of target tracking or multi-sensor data fusion. Background technique [0002] Most modern tracking and surveillance systems use multi-radar fusion tracking to improve performance and obtain more accurate target tracks. However, in practice, the track after fusion often cannot reach the theoretical accuracy. The quasi-problem has not been fully resolved. Multi-radar error registration includes steps such as system error estimation and error correction, among which the key link is system error estimation. [0003] The radar system error estimation mainly includes two types of methods, one is to use the da...

Claims

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Application Information

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IPC IPC(8): G01S7/40
Inventor 刘颢肖厚陈世友许治华
Owner NO 709 RES INST OF CHINA SHIPBUILDING IND CORP
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