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Equal-elevation-angle searching method for narrow-beam radar to capture space target

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: 2021-11-12
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

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  • Equal-elevation-angle searching method for narrow-beam radar to capture space target

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Embodiment Construction

[0127] The present invention is described in further detail now in conjunction with accompanying drawing.

[0128] The space target point forecast error can be decomposed into orbit along track error, orbit surface normal error and orbit radial error. According to the theory of artificial satellite dynamics, the point position forecast error is mainly reflected in along track error, which increases rapidly with the forecast time , especially for low-orbit high-dynamic targets, the error increases quadratically with time and grows very rapidly, while the errors in other directions increase linearly with time and grows very slowly, mainly due to the perturbation of the right ascension of the ascending node of the orbit cause. Therefore how to effectively eliminate the adverse effects of track along track error on radar discovery and capture targets has become the focus of the present invention, and is also the theoretical starting point of the technical solution of the present i...

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Abstract

The invention provides an equal-elevation-angle searching method for a narrow-beam radar to capture a space target, which adopts basic methods of celestial mechanics and celestial body metrology, in particular to a new method for guiding the narrow-beam radar to find and capture the target based on precise orbit parameters of the space target, and is an equal-elevation search method. The method can overcome the difficulty that the radar narrow beam is difficult to capture the target due to the fact that the prediction trace error diffusion is fast in the traditional point location prediction search method, remarkably improves the capture success rate of the narrow beam radar to the space target, and is an effective technical means for improving the radar application benefit.

Description

technical field [0001] The invention belongs to the field of space detection, and in particular relates to an equal-elevation-angle search method for capturing a space target by a narrow-beam radar. Background technique [0002] Precision tracking imaging radar is an important means of space target recognition and precise orbit determination, which can provide strong technical support for space target collision warning and motion situation awareness. In order to achieve high resolution imaging and high precision point observation data, Radar generally works in the high-frequency band and uses a large-aperture antenna, so its detection beam is very narrow, and the effective beam diameter (half-power beam width) is usually less than 0.1°. In recent years, with the increase of remote sensing satellite satellite-ground link information transmission rate, broadband high-speed transmission has become the development trend of satellite-ground data transmission. The satellite ground...

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Application Information

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Patent Type & Authority Applications(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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