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Close range target updating cycle calculating method based on secondary radar

A target update and secondary radar technology, applied in the direction of radio wave reflection/re-radiation, using re-radiation, measuring devices, etc., can solve problems such as inability to fully and effectively deal with close-range targets

Active Publication Date: 2014-09-03
NANJING NRIET IND CORP
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  • Claims
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Problems solved by technology

[0005] Aiming at the problem that the existing technology cannot fully and effectively deal with the tracking of short-distance targets, the present invention provides a method for calculating the update period of the target in real time according to the movement of the short-distance target

Method used

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  • Close range target updating cycle calculating method based on secondary radar
  • Close range target updating cycle calculating method based on secondary radar
  • Close range target updating cycle calculating method based on secondary radar

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Embodiment Construction

[0042] The present invention will be further described below in conjunction with the accompanying drawings.

[0043] Such as figure 1 As shown, the present invention provides a kind of calculation method based on the short-distance target update cycle of secondary radar, it is characterized in that: comprise the following steps:

[0044] Step 1: Divide the long-distance area and the short-distance area (generally short-distance area and extremely close-distance area):

[0045] When the target is close to the secondary radar station, the area where it is located is divided according to the elevation angle and slant distance of the target. The specific areas are: long-distance area and short-distance area. The short-distance area is subdivided into general short-distance area and extremely short-distance area area. To this end, the parameter thresholds of each area are set respectively, and the slope distance thresholds are ρ Far , ρ NormalNear , ρ TooNear , where ρ Far >ρ...

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Abstract

The invention relates to a close range target updating cycle calculating method based on a secondary radar. The close range target updating cycle calculating method includes the first step of generating a remote area, an ordinarily close range area and an extremely close range area in a division mode, the second step of calculating the updating cycle of a target in real time according to the movement situation under the polar coordinates of the target when the target gets close to a secondary radar station and is located within the ordinarily close range area, the third step of converting target processing from a polar coordinate system to a rectangular coordinate system when the target continues to get close to the secondary radar station and is located within the extremely close range area and carrying out track updating and track smoothing on the target on the basis of the rectangular coordinates, the fourth step of calculating the real-time updating cycle of the target according to the track information generated in the third step, storing the updating cycle and finishing processing. By means of the close range target updating cycle calculating method based on the secondary radar, the real-time updating cycle of the target can be obtained, the detection position of the target in the next scanning process can be accurately predicted, the close range target can be tracked and monitored accurately, and false targets can be filtered out more accurately.

Description

technical field [0001] The invention relates to the technical field of secondary radar monitoring, in particular to a calculation method for a short-distance target update period of secondary radar. Background technique [0002] With the development of the civil aviation industry, the application of secondary radar in air traffic control is playing an irreplaceable role. Due to the advantages of high efficiency, high measurement accuracy, low power, and low cost in practical applications, secondary radar has been widely used in the civil aviation industry, especially after the development and application of single-pulse secondary radar, the detection accuracy has been further improved . [0003] Due to the complex electromagnetic environment in the actual airspace, the secondary radar signal will be interfered to a certain extent. At the same time, mountains, lakes or high-rise buildings will also reflect the electromagnetic signal, thus affecting the observation effect of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/74
CPCG01S13/72G01S13/76G01S13/91
Inventor 张继明何康陆峰
Owner NANJING NRIET IND CORP
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