An angle measurement correction method and angle measurement correction system for secondary surveillance radar

A secondary surveillance radar and angle measurement technology, which is applied in radio wave measurement systems, measurement devices, and re-radiation, etc., can solve the problems of high cost, difficult to improve platform accuracy, complex mechanically stable platform structure, etc., and achieve accurate correction. The effect of high degree and low system processing capacity requirements

Active Publication Date: 2019-07-16
四川九洲空管科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • An angle measurement correction method and angle measurement correction system for secondary surveillance radar
  • An angle measurement correction method and angle measurement correction system for secondary surveillance radar
  • An angle measurement correction method and angle measurement correction system for secondary surveillance radar

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specific Embodiment 1

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

[0027] Step 1: Obtain the roll angle ε and the pitch angle Φ generated by the swing of the secondary surveillance radar carrier in real time;

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

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

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

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

specific Embodiment 2

[0039] On the basis of the specific embodiment 1, in this specific embodiment, the setting threshold range of the pitch angle Φ is [-20°~+20°].

specific Embodiment 3

[0041] On the basis of the specific embodiment 1 or 2, in this specific embodiment, the setting 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 air control field. Background technique [0002] Secondary Surveillance Radar (SSR) is an air traffic control radar beacon system (ATCRBS), which is one of the necessary equipment for modern air traffic control systems. It can not only detect the distance and orientation of the aircraft, but also obtain the aircraft identification code and air pressure. Information such as altitude has the dual functions of radar and communication, so it is widely used in the fields of civil and military aviation. For civilian use, secondary surveillance radars are usually installed near airports and on air routes; while for military use, secondary surveillance radars are not only...

Claims

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Application Information

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Patent Type & Authority Patents(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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