Method for detecting ionized layer TEC exception

Abstract

The invention discloses a method for detecting ionized layer TEC exception. The method comprises the following steps of: A, performing smoothing filtration on an ionized layer TEC time sequence; selecting the TEC time sequence of any point according to the space-time characteristics of ionized layer TEC distribution, and performing smoothing filtration on the ionized layer TEC time sequence by adopting a moving average method to obtain a smoothed TEC time sequence; B, calculating a difference between a TEC smoothing value and an observation value so as to obtain a time sequence of a smoothed residual error; C, determining the arc length of a sliding window, calculating a mean value and a standard difference, adding 2 times standard difference to the mean value to obtain an upper limit value, subtracting 2 times standard difference from the mean value to obtain a lower limit value, performing exception detection on the time sequence of the residual error, comparing the data with the upper limit value and the lower limit value, and judging that the data between the upper limit value and the lower limit value is normal; and D, storing the detection result. The method is simple, has obvious effect, creatively performs the exception detection of the ionized layer TEC based on the smoothed residual error data, deducts the long periodic tendency of the TEC, and greatly improves the reliability of the detection result.

Description

technical field [0001] The invention relates to the technical field of monitoring the space environment, and more specifically relates to a method for detecting an abnormal ionospheric TEC, which is a monitoring method suitable for the complex and changeable space ionospheric TEC. Background technique [0002] As an important part of the earth's space environment, the activities of the ionosphere are closely related to human production and life. The ionosphere has an important impact on modern radio engineering systems and human space activities; solar activity, earth motion and changes in the geomagnetic field affect ionization layer existence and spatiotemporal variation. The eruption of solar flares can cause abnormalities in the ionosphere, affecting radio communication, navigation, and electromagnetic-related business activities; local disturbances of the sun can also cause ionospheric storms caused by the normal structure of the ionosphere, thereby greatly attenuating ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to propose a method for detecting ionospheric TEC anomalies in view of the complex and changeable ionospheric TEC around the earth, which indirectly affects human production and life. The method is simple and beneficial to programming. The TEC residual time series of TEC is used as the research object, which greatly improves the accuracy of the detection results and has significant scientific research and use value

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