Angle correction method and angle correction system for secondary surveillance radars

A technology of secondary surveillance radar and angle measurement, which is applied in radio wave measurement system, measurement device, utilization of re-radiation, etc. It can solve the problems of high cost, difficult platform precision, unsuitable radar system, etc., and achieve system processing capacity Effects with low requirements and high correction accuracy

Active Publication Date: 2017-06-20
四川九洲空管科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the complex structure and high cost of the mechanically stabilized platform, and the difficulty of making the platform high-precision, it is not suitable for all radar systems

Method used

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  • Angle correction method and angle correction system for secondary surveillance radars
  • Angle correction method and angle correction system for secondary surveillance radars
  • Angle correction method and angle correction system for secondary surveillance radars

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specific Embodiment 1

[0026] A method for correcting angle measurement for secondary surveillance radar, the specific method steps are:

[0027] Step 1, obtaining the roll angle ε and pitch angle Φ generated by the sway of the SSR carrier in real time;

[0028] Step 2, judging whether the pitch angle Φ and roll angle ε are both within the set threshold range, if yes, go to the next step, if not, go to step 1;

[0029] Step 3, obtaining the measured azimuth θ′, distance R and C-mode height H obtained by the secondary surveillance radar when the pitch angle Φ and roll angle ε are both within the set threshold range;

[0030] Step four, according to Obtain the elevation angle α of the target; and according to Get the corrected azimuth angle θ;

[0031] The roll angle refers to that, in the space Cartesian coordinate system, assuming that the normal direction of the carrier platform of the secondary surveillance radar is the x-axis, the swing generated by taking the x-axis as the rotation axis is ...

specific Embodiment 2

[0038] On the basis of the specific embodiment 1, in this specific embodiment, the set threshold range of the pitch angle Φ is [-20°-+20°].

specific Embodiment 3

[0040] On the basis of specific embodiment 1 or 2, in this specific embodiment, the set threshold range of the roll angle ε is [−45°, +45°].

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Abstract

The invention provides an angle correction method and an angle correction system for secondary surveillance radars. The method comprises the following steps: acquiring a roll angle Epsilon and a pitch angle Phi produced by swing of a secondary surveillance radar carrier; judging whether the roll angle Epsilon and the pitch angle Phi are within set threshold scopes; and if the roll angle Epsilon and the pitch angle Phi are within the set threshold scopes, acquiring a measured azimuth angle Theta', a range R and a C-mode height H obtained through target detection by the secondary surveillance radar when the roll angle Epsilon and the pitch angle Phi are within the set threshold scopes, and correcting the azimuth angle. Compared with the prior art, the problem that the azimuth measured by a mobile platform secondary surveillance radar is out of tolerance due to swing of the carrier under the condition of not using a mechanical stabilizing method is solved; and the angle is corrected through a software method, the use of heavy mechanical stabilizing facilities is avoided, the space is expanded and the weight is reduced for the carrier platform, the requirement on the processing ability of the system is not high, compensation can be made in real time, and the correction precision is high.

Description

technical field [0001] The invention relates to an angle measurement correction method and an angle measurement correction system for a secondary surveillance radar, in particular to an angle measurement correction method and an angle measurement correction system for a secondary surveillance radar suitable for the field of air control. Background technique [0002] Secondary Surveillance Radar (SSR) is an air traffic control radar beacon system (ATCRBS). It is one of the necessary equipment for modern air traffic control systems. Information such as altitude has dual functions of radar and communication, so it is widely used in civil and military aviation fields. For civilian use, SSR is usually installed near airports and on air routes; for military use, SSR is not only installed on land, but sometimes also installed on airborne and ship-borne platforms. [0003] For the ship-borne platform, when the ship is sailing at sea, it will sway violently due to factors such as wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/40G01S13/74
CPCG01S7/4004G01S13/74
Inventor 王强
Owner 四川九洲空管科技有限责任公司
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