Meteor detection method based on incoherent scattering radar

Abstract

The invention discloses a meteor detection method based on an incoherent scattering radar, and the method comprises the following steps: (1), dividing original baseband orthogonal two-path sampling data into two parts, enabling one part of the data to serve as the input data of meteor head event detection, enabling the other part of the data to serve as the input data of meteor trail event detection, and enabling the two parts of event detection to operate in parallel as independent steps; (2) carrying out meteor event detection; and (3) carrying out meteor parameter extraction. According to the meteor detection method based on the incoherent scattering radar, the sensitivity to a radar beam arrival angle is overcome, the coverage range of a detectable meteor area is widened, meteor eventscan be detected in real time, and meteor parameters such as the height, the radial speed, the radial deceleration and the equivalent scattering sectional area are extracted.

Description

technical field [0001] The invention belongs to the field of space environment detection, in particular to an 80km-160km meteor detection method based on incoherent scattering radar in the field. Background technique [0002] Composite granular matter from interstellar space, when entering the Earth's atmosphere (generally below 160km), will have violent friction with surrounding atmospheric molecules, generating a large amount of heat, light and ionization, thus forming a meteor event. Meteors include meteoroids moving at high speed at the front end (generating meteor head echoes) and long thin parabolic ionized gas at the rear end (generating meteor trail echoes). In the book "Meteor Science and Engineering", McKinley introduced a method of using VHF (Very High Frequency) frequency band meteor radar to observe meteor trails. Bo completed the observation of meteors. The disadvantage of this method is that it is very sensitive to the measurement angle. For monostatic radar...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that it is very sensitive to the measurement angle. For monostatic radar, the meteor trail and the radar beam must be approximately orthogonal to ensure that the backscatter echo can be measured; and because the meteor radar can only detect meteor trails with an initial diameter less than or equal to the radar wavelength, and the initial diameter of the meteor trail increases with altitude

Some studies have pointed out that the VHF meteor radar can actually detect only 3.5% of the theoretically detected meteors; in addition, the meteor radar can rarely observe the meteor head echo, these shortcomings limit the observation and research on meteors

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