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A Method of Small-Size Space Debris Detection and Parameter Extraction Based on Incoherent Scatter Radar

A technology of incoherent scattering and space debris, used in measurement devices, re-radiation, radio wave measurement systems, etc., to improve measurement accuracy, overcome accumulated losses, and have wide applicability

Active Publication Date: 2022-04-22
中国电波传播研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • A Method of Small-Size Space Debris Detection and Parameter Extraction Based on Incoherent Scatter Radar
  • A Method of Small-Size Space Debris Detection and Parameter Extraction Based on Incoherent Scatter Radar
  • A Method of Small-Size Space Debris Detection and Parameter Extraction Based on Incoherent Scatter Radar

Examples

Experimental program
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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 number of accumulated pulses N,...

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Abstract

The invention discloses a small-size space debris detection and parameter extraction method based on incoherent scattering radar, including the following steps: (1) Space debris target detection based on traversal search radar echo data based on a combination of large step size and small step size : (2) Fast coherent accumulation; (3) Correction of space debris orbital parameters based on Bayesian regression. Compared with the current radar target detection algorithm, the method disclosed in the present invention can effectively overcome the accumulation loss caused by the Doppler sensitivity of the phase encoding signal; it can complete the coherent accumulation with a calculation amount lower than that of the traditional MTD algorithm, through Combined with technologies such as parallel computing and GPU acceleration, it can complete real-time space debris target detection and parameter extraction.

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 Patents(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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