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Method of detecting TEC abnormity of seismic ionized layer

An ionospheric and anomaly technology, which is applied in the monitoring of space ionospheric TEC and the field of seismic ionospheric TEC anomaly detection. Simple and fast method

Pending Publication Date: 2020-09-25
湖北省地震局
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Problems solved by technology

[0003] In order to solve the technical problem that the ionospheric TEC anomaly in the current seismic ionospheric effect cannot be effectively detected and effectively identified in the background technology, the present invention provides a method that is simple, easy to program, and greatly improves the accuracy of the detection results and A Method for Detecting Seismic Ionospheric TEC Anomalies with Significant Scientific Research and Application Value

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  • Method of detecting TEC abnormity of seismic ionized layer
  • Method of detecting TEC abnormity of seismic ionized layer
  • Method of detecting TEC abnormity of seismic ionized layer

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Embodiment 1

[0033] Such as figure 1 Shown, the present invention provides a kind of method that detects seismic ionospheric TEC anomaly, and it comprises the steps:

[0034] The first step is to smooth and filter the ionospheric TEC time series; select the time series TEC(t) (t=1~n) of TEC at any point, and use the Savitzky-Golay filtering method to smooth and filter the ionospheric TEC time series to obtain Smoothed time series

[0035]

[0036] In the formula, t is the current epoch, m and k are the number of epochs before and after the filtering window respectively, and the length of the filtering window is selected as 9 in the specific smoothing process, and a i is the filter coefficient, and it is not necessary to obtain a specific value. It is only necessary to satisfy the minimum sum of squares E of the fitting error:

[0037]

[0038]

[0039] The second step is to calculate the difference between the TEC smooth value and the observed value, and obtain the time serie...

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Abstract

The invention discloses a method for detecting TEC abnormity of a seismic ionized layer, and the method comprises the steps: firstly carrying out the smoothing of an original TEC observation value through Savitzky-Golay filtering, then carrying out the subtraction of the observation value and a smooth value of TEC, and obtaining a residual error which is disturbance. The method is simple and rapidin calculation; the method is simple in operation and obvious in effect, Savitzky-Golay filtering is innovatively used for detecting the anomaly of the ionized layer TEC, the distribution characteristics such as the relative maximum value, the minimum value and the width of the ionized layer TEC are reserved, interference of daily fluctuation is reduced, and the reliability of a detection resultis greatly improved.

Description

technical field [0001] The invention belongs to the technical field of monitoring the space environment, and relates to a method for detecting the abnormality of the seismic ionosphere TEC, in particular to a monitoring method suitable for complex and changeable space ionosphere TEC. Background technique [0002] Earthquake is one of the most destructive and most serious sudden natural disasters to human beings. A large number of studies have shown that seismic activity can also induce the generation and propagation of acoustic gravity waves in the ionosphere, and the ionospheric TEC (TEC, Total Electronic Contents, total electronic content of the ionosphere) will increase abnormally or The decrease, which appears near the sky above the seismogenic region, can be regarded as the ionospheric effect caused by the earthquake. Therefore, the research on the detection of the abnormal activity of the ionospheric TEC has become one of the focuses of the current research on earthqu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01T1/29
CPCG01T1/2914
Inventor 祝芙英林剑翟笃林卿芸
Owner 湖北省地震局