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Detection method for electron density of ionization layer based on radar echoes

A technology of electron density and radar echo, applied in radio wave measurement systems, instruments, etc., can solve the problems of insufficient adaptive ability of ionospheric environment, improve the adaptive ability of ionospheric radio wave environment, high compatibility and portability good effect

Active Publication Date: 2017-02-01
中国电波传播研究所
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Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a detection method of ionospheric electron density based on the original echo of space surveillance radar based on the principle of ionospheric incoherent scattering detection in view of the current situation that the ionospheric environment self-adaptive ability of my country's space surveillance radar is insufficient

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  • Detection method for electron density of ionization layer based on radar echoes
  • Detection method for electron density of ionization layer based on radar echoes
  • Detection method for electron density of ionization layer based on radar echoes

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Embodiment 1

[0044] Example 1, such as figure 2As shown, this embodiment discloses a method for detecting ionospheric electron density based on radar echo, and its implementation steps are as follows:

[0045] (1) Raw data collection and preprocessing

[0046] Firstly, the required data should be collected and stored, including the ionospheric scattering echo signal, emission pulse signal, sampling clock, synchronous pulse signal, etc. in each pulse repetition period; then the sampling data should be stored in the form of data files. Note that it is necessary to eliminate the influence of space targets and interference on space scattering echo data.

[0047] (2) Ionospheric incoherent scattering echo extraction

[0048] Since the ionospheric incoherent scattering is very weak (10dB lower than the background noise, related to the ionospheric electron density, etc.), the method of coherent accumulation is generally adopted, and the accumulation is at least 1000 times, so the data of at le...

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Abstract

The invention discloses a detection method for the electron density of an ionization layer based on radar echoes. The method is realized by the following steps that (1) original data is collected and stored; (2) non-coherent scattering echoes are extracted from the ionization layer; and (3) the electron density of the ionization layer is calculated. The disclosed detection method has great significance in radar wave environment adaptation and space environment monitoring and early-warning domestically; and compared with a present special-purposed electron density detection method for the ionization layer, the method of the invention is simple and economic. The method of the invention is also high in compatibility and transplantability, and is suitable for most space monitoring radars, and the radars need only to provide signal interfaces of original echo signals, emission pulse signals, main pulse signals and sampling clock and the like.

Description

technical field [0001] The invention relates to the field of space environment monitoring and early warning, in particular to a method for detecting ionospheric electron density based on radar echoes. Background technique [0002] The ionosphere is the space region above 60 kilometers to about 1000 kilometers on the ground, where there are a large number of free electrons, which have an important impact on the radio wave propagation characteristics of the radio system, and the temporal and spatial distribution of ionospheric electron density is the concern of ionospheric wave propagation The main parameters. For example, the short-wave long-distance communication system is realized by the reflection of the ionosphere to the short-wave signal, and the distribution of electron density in the ionosphere directly determines the available frequency band of the short-wave communication link. Another example is that the radio signal of the space surveillance radar propagates throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 丁宗华代连东吴健许正文王宁唐志美
Owner 中国电波传播研究所
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