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Equal-elevation-angle search method for space targets captured by narrow-beam radar

A space target and search method technology, applied in the field of elevation angle search, can solve the problems of not being applicable to low-orbit high-dynamic target acquisition and tracking, and not fully applicable to radar acquisition and tracking, so as to improve the acquisition success rate, improve efficiency, and broaden applications conditional effect

Active Publication Date: 2022-05-31
ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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Problems solved by technology

The above successful experience is mainly attributed to the change of space target acquisition strategy. Although due to the difference in the detection mechanism of radar and optical telescope, the above method is still insufficient to deal with the influence of orbital perturbation, and the application requirements and detection objects are different. It is not completely suitable for the capture and tracking of space targets by radar, especially not suitable for the capture and tracking of low-orbit high-dynamic targets by narrow-beam radar, but the processing ideas in it are worth learning

Method used

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  • Equal-elevation-angle search method for space targets captured by narrow-beam radar
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  • Equal-elevation-angle search method for space targets captured by narrow-beam radar

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Embodiment Construction

[0126] The present invention will now be described in further detail in conjunction with the accompanying drawings.

[0131] 1) a known set of target precise orbital parameters, which can be orbital parameters many days ago;

[0134] 4) A dimensionless scale factor, which takes a value in the closed interval [0,1] to help the user select a reasonable

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[0177] Due to the rotation of the earth, from the ground observatory, targets at different positions in the same orbit during a transit

[0191] Through the above processing, we start from the view trajectory cluster {Γ

[0201] h=h

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[0219] due to t

[0220] due to t

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[0228] The time range when the real target rises to the specified elevation angle is the closed interval [t

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[0236] Where δ is a dimensionless scale factor, which can take...

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Abstract

The present invention proposes an equal-elevation-angle search method for narrow-beam radar to capture space targets, adopts the basic methods of celestial mechanics and astrometry, specifically based on the precise orbital parameters of space targets, and constructs a method to guide narrow-beam radar to discover and capture A new method for targets, which is an equal-elevation angle search method, can overcome the difficulty of the traditional point forecast search method due to the rapid spread of forecast along-track errors and the difficulty of capturing targets with narrow beams of radars, and significantly improve the capture of space targets by narrow beam radars The success rate is an effective technical means to improve the efficiency of radar applications.

Description

Equal-elevation search method for space target captured by narrow beam radar technical field The invention belongs to the space detection field, be specifically related to a kind of equal elevation angle search that narrow beam radar captures space target method. Background technique Precision tracking imaging radar is an important means of space target recognition and precise orbit determination, which can be used for collision prediction of space targets. It provides strong technical support for high-resolution imaging and high-resolution point observation data. Accuracy, radar generally works in high frequency band and adopts large-diameter antenna, so its detection beam is very narrow, and the effective beam diameter (Half-power beamwidth) is typically less than 0.1°. In recent years, with the growth of the information transmission rate of remote sensing satellite satellite-ground links, broadband High-speed transmission has become the development trend of sat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S13/72G01S13/50
CPCG01S13/72G01S13/50Y02A90/10
Inventor 徐劲曹志斌刘科君杜建丽杨冬马剑波
Owner ZIJINSHAN ASTRONOMICAL OBSERVATORY CHINESE ACAD OF SCI
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