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Small-size space debris detection and parameter extraction method based on incoherent scattering radar

A technology of incoherent scattering and space debris, applied in the direction of measuring devices, using re-radiation, radio wave measuring systems, etc.

Active Publication Date: 2019-04-05
中国电波传播研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are few reports on the details of its signal processing and experimental methods, and there is also a lack of domestic research on the detection of space debris by incoherent scattering radar

Method used

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  • Small-size space debris detection and parameter extraction method based on incoherent scattering radar
  • Small-size space debris detection and parameter extraction method based on incoherent scattering radar
  • Small-size space debris detection and parameter extraction method based on incoherent scattering radar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] Example 1: The main parameters of the Meridian Project Qujing incoherent scattering radar (the first set in my country, which is operated and managed by the 22nd Institute of CETC) are:

[0061] working frequency

500MHz

transmit peak power

2MW

maximum duty cycle

5％

pulse repetition period

1-20ms (eg 12ms)

antenna gain

41dB

System noise temperature

130K

detection method

beam field observation

[0062] The workflow can be found at figure 2 , the specific implementation process is as follows:

[0063] (1) First, read in the two-dimensional baseband IQ sampling signal

[0064] χ(m,p), m=1,2,...,M, p=1,2,...,P; M is the total number of sampling points in the range gate in a single IPP, and P is the total number of IPPs read. And read in the detection parameters, including the starting height h of the radar range gate 0 , the maximum radial velocity v max (Generally set to 5km / s), the numbe...

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Abstract

The invention discloses a small-size space debris detection and parameter extraction method based on incoherent scattering radar. The method comprises the following steps of (1), carrying out space debris target detection based on large step size and small step size combined traversal search radar echo data; (2), carrying out repaid coherent integration; and (3), carrying out space debris orbit parameter c based on Bayesian regression. Compared with an existing radar target detection algorithm, the method disclosed by the invention has the advantages that integration losses of phase-coded signals resulting from Doppler sensibility can be effectively overcome. The coherent integration can be finished with operation quantity lower than that of a conventional MTD algorithm. Through combination of technologies such as parallel computing and GPU acceleration, real-time space debris target detection and parameter extraction can be finished.

Description

technical field [0001] The invention belongs to the field of space environment monitoring, and in particular relates to a method for detecting and extracting parameters of small-sized space debris at near-earth orbit heights based on incoherent scattering radar in the field. Background technique [0002] Since the Soviet Union launched the world's first artificial satellite in 1957, decades of human space activities have left a large amount of space junk, also known as space debris, in the earth's space. These space debris are uncontrolled and numerous in number, among which there are about 500,000 pieces with an equivalent diameter of 1 cm or more; and 135 million pieces with a size of 1 mm or more. The generation of space debris mainly comes from the explosion of spacecraft, the release of experiments, the fuel discharged by rockets, and the disintegration of satellites. [0003] As the number of space debris increases exponentially, its existence is increasingly threaten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/88G01S7/41
CPCG01S7/415G01S13/88
Inventor 杨嵩丁宗华代连东唐志美许正文吴健
Owner 中国电波传播研究所
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