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Method for processing radar target information in navigating tube automatization system

An automation system and radar target technology, which is applied in the field of radar target information processing in the air traffic management automation system, can solve the problems of tracking performance degradation, filter divergence, calculation errors, etc., to improve processing accuracy, reduce projection transformation errors, and The effect of applying the foreground

Inactive Publication Date: 2008-06-25
WISESOFT CO LTD
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Problems solved by technology

[0004] At present, the radar tracking system is based on the dynamic motion model and the observation model, and usually these models are models in the Cartesian coordinate system, which is different from the polar coordinate model reported by the radar, so the radar tracking is Including a nonlinear estimation problem, of course, it is also possible to use the extended Kalman filter or the second-order extended Kalman filter algorithm in the mixed coordinate system, but this approximation will introduce a relatively large amount of time in the estimation of the target motion state and the calculation of the error covariance matrix. Large errors, which lead to reduced tracking performance, and severe filter divergence

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  • Method for processing radar target information in navigating tube automatization system

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[0028] In Figure 2, ||OB||=||OC||=||OD||=R (equivalent radius of the earth), ||AB||=C (height of the radar station), ||PC|| =H(target height reported by ATC radar), ||AP||=r(target slant distance reported by radar)

[0029] (1) In ΔAOP, calculate ∠OAP:

[0030] If the radar reports an elevation angle η, then ∠OAP=90°+η;

[0031] In air traffic control radar, the pitch angle η is usually not reported, but the target height H is reported, that is, the value of ||PC||, then by the law of cosines in ΔAOP:

[0032] cos∠OAP=(OA 2 +AP 2 -OP 2 ) / (2*OA*AP), where ||OP||=R+H, ||OA||=R+C, ||AP||=r.

[0033] (2) In ΔADP, calculate ||DP||:

[0034] DP can be obtained by the law of cosines 2 =AP 2 +AD 2 -2*AP*AD*cos∠OAP, where ||AD||=2R+C

[0035] (3) In ΔADP, calculate ∠APD:

[0036] From the sine law sin∠APD=AD / DP*sin∠OAP,

[0037] (4) in ΔAPP 2 In, calculate||AP 2 ||, that is, the projection of the target in the processing plane:

[0038] By the law of sines||AP 2 ||=AP*s...

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Abstract

A processing method for radar target information in an air traffic control (ATC) automatic system includes the following steps: firstly, an ATC radar determines the target information of airplane distance and azimuth; moreover, the target information is shown by the polar coordinate taking the position of the radar as the center; taking the influence of the earth ellipsoid into consideration, the target information which is shown by the polar coordinate is converted to a plane rectangular coordinate taking the radar as the origin from the polar coordinate, thereby providing convenience to Kalman filtering tracking of an airplane target in a plane rectangular coordinate system. Compared with the common algorithm, the method can reduce conversion error and improves precision processing.

Description

technical field [0001] The invention relates to a method for processing radar target information in an automatic air traffic control system, in particular to a method for filtering and tracking after the coordinate transformation between the spherical polar coordinates of the air observation radar and the rectangular coordinates of the target tracking processing plane. When the air traffic control radar reports the target position in polar coordinates, it converts the reported position into rectangular coordinates for processing, and then performs radar tracking. Background technique [0002] The air-to-air observation radar obtains the distance between the detection target and the radar station through the time delay of the transceiver system, and determines the position of the detection target according to the scanning direction of the antenna. Therefore, most of the position parameters of the target are local polar coordinates centered on the position of the radar station ...

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Application Information

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IPC IPC(8): G01S7/02G01S13/74G01S13/66
Inventor 王运锋
Owner WISESOFT CO LTD
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