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Method for identifying sudden ionospheric disturbance event based on ionospheric vertical detection data

A technology of vertical detection and identification method, applied in the field of ionospheric physics research, which can solve the problem that the monitoring and identification of sudden ionospheric disturbance events cannot be realized.

Pending Publication Date: 2022-06-03
中国电波传播研究所
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Problems solved by technology

Affected by various factors (X-ray flare occurrence time, ground position, etc.), the degree of ionospheric disturbance caused by X-ray flares of the same level is different. Therefore, it is impossible to monitor and monitor sudden ionospheric disturbance events only by using solar X-ray observations. identify

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  • Method for identifying sudden ionospheric disturbance event based on ionospheric vertical detection data
  • Method for identifying sudden ionospheric disturbance event based on ionospheric vertical detection data
  • Method for identifying sudden ionospheric disturbance event based on ionospheric vertical detection data

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Embodiment 1

[0037] The minimum echo frequency fmin parameter on the vertical sounding ionogram of the ionosphere can partially reflect the absorption degree of the ionosphere to short-wave signals. Factors affecting the fmin parameter are: (1) the magnification and sensitivity of the recording system as a function of frequency; (2) the ionospheric absorption; (3) the noise level. The fmin parameter is not sensitive to small changes in the ionosphere, and is suitable for identifying the phenomenon of enhanced absorption of ionospheric short-wave signals caused by solar flare events. Therefore, it is reasonable and feasible to conduct quasi-real-time monitoring of sudden ionospheric disturbance events using the ionospheric vertical detection fmin data in different regions of my country, which can be used as an effective technical means to monitor sudden ionospheric disturbance events, and can provide effective short-wave systems. ionospheric environment information. The ratio of fmin to foF...

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Abstract

The invention discloses a sudden ionospheric disturbance event identification method based on ionospheric vertical detection data. The method comprises the following steps: step 1, collecting and arranging data fmin and foF2 of each ionospheric observation station during M5.0-level historical solar flare burst in the daytime of China; step 2, calculating the ratio of the data of the time fmin and foF2 corresponding to each ionosphere observation station, statistically analyzing the distribution condition of fmin / foF2, and determining different intensity levels of the ionosphere absorption degree at the position of each ionosphere observation station; and step 3, determining the intensity level of the sudden ionospheric disturbance event. According to the sudden ionospheric disturbance event identification method disclosed by the invention, the absorption index representing the ionospheric absorption degree is calculated by using the ionospheric vertical detection ionogram minimum echo frequency and the ionospheric critical frequency, and the ionospheric absorption degree of a certain area can be simply and directly represented; and ionosphere absorption degree information of different regions in China can be provided for short-wave electronic information systems and the like.

Description

technical field [0001] The invention belongs to the field of ionospheric physics research, and particularly relates to a method for identifying a sudden ionospheric disturbance event based on ionospheric vertical detection data in the field. Background technique [0002] Solar activity strongly controls the behavior of the ionosphere. Solar flares are active phenomena of sudden brightening of local areas of the sun's atmosphere, accompanied by enhanced radiation and particle events in various electromagnetic bands. One flare can release 10 32 erg, and at the same time release a large stream of high-energy charged particles. During a solar flare, the solar radiation Soft X-ray intensity can reach 10% on a quiet day 3 times. These soft X-rays and ultraviolet rays from the sun travel to Earth at the speed of light (about 8.3 minutes). [0003] When the electromagnetic wave propagates through the plasma, the electric vector of the wave causes the motion of the electron, a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10
CPCG06F17/10Y02A90/10
Inventor 班盼盼孙树计王飞飞王保健
Owner 中国电波传播研究所
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