Space multi-target detection system and method

A detection method and multi-target technology, applied to radio wave measurement systems, instruments, etc., can solve the problem that the antenna array signal synthesis method cannot be directly applied to radar detection, etc., to achieve multi-target general measurement and precise positioning capabilities, high observation The effect of resolution, low construction and maintenance costs

Active Publication Date: 2021-05-04
NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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Problems solved by technology

Therefore, the antenna array signal synthesis method in radio astronomy and deep space communication cannot be directly applied to radar detection

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  • Space multi-target detection system and method
  • Space multi-target detection system and method
  • Space multi-target detection system and method

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Embodiment Construction

[0117] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0118] The acquisition of multiple targets in unknown orbital space is a difficult point in ground-based radar detection. Aiming at the deficiencies of common ground-based radar detection methods, the invention discloses a spatial multi-target detection method based on antenna array synthetic aperture mapping. Multiple targets here refer to space debris, satellites, asteroids or other space targets. Due to the wide beam of the receiving antenna, simultaneous observation of multi-target general survey and precise orbit determination can be realized through data processing.

[0119] The signal receiving antenna of the present invention adopts a large number of small and medium antenna arrays; the transmitting antenna can a...

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Abstract

A space multi-target detection system and method, the method comprising: performing cross-correlation calculations on each of multiple receiving antenna signals; obtaining a brightness distribution function according to the cross-correlation calculation results, and realizing comprehensive aperture mapping of the observation area; using The observed data or predictive calculation realizes the suppression of the cosmic background noise in the synthetic aperture map; according to the observation data or the orbital mechanics model, corrects the image blur caused by the movement of the space object in the synthetic aperture map; judges by the threshold Realize the identification and direction estimation of multiple targets in the synthetic aperture image; for the selected target direction, realize the time delay and phase difference calculation of each antenna relative to the phase center, and perform time delay and phase adjustment; according to the time delay and phase The difference calculation value realizes the alignment of each antenna signal in the selected target direction; the signal value of each receiving antenna is added in the same direction to realize the observation of the signal source in the selected target direction.

Description

technical field [0001] The present invention relates to the field of space technology, in particular to ground-based detection technology for space objects such as space debris and asteroids, and more particularly to a space multi-object detection system and method. Background technique [0002] As an active detection device, ground-based radar can detect a large airspace compared with optical detection devices, and has the advantages of working all-weather and all-weather. It is the main method for detecting space debris in low and medium orbits. As of the end of 2014, there were 16,906 Earth orbit objects routinely tracked and cataloged, of which only about 6% were payloads, and the rest were all space debris, with more than 500,000 pieces of space debris larger than 1cm in size. The existence of space debris brings great harm to the normal operation of spacecraft. [0003] The potential impact threat of small near-Earth objects on the earth has been more and more recogni...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 孔德庆张凯李春来张洪波苏彦朱新颖李臣
Owner NAT ASTRONOMICAL OBSERVATORIES CHINESE ACAD OF SCI
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