Methods for remote sensing on initial continuous current of artificially triggered lightning applying low-frequency magnetic field antenna

Abstract

The invention discloses a methods for remote sensing on initial continuous current of artificially triggered lightning applying low-frequency magnetic field antenna. By applying the responsing frequecy characteristics of low-frequency magnetic field antenna outside the effective detected frequency band, adopt numerical integration method to process mathematically the waveform of magnetic field obtained near channel of artificially triggered lightning, which can effectively remove the influence of noise signal in measuring process and obtain the characteristic discharging process in experiment of artificially trigered lightning, namely the high time solution waveform of initial continuous current. The manufacturing and erection of low-frequency magnetic field antenna is relatively easy and with low cost, whose parameters such as gain can be adjusted based on different experimental requirements, with strong practibility; besides, the result of artificially triggered lightning of inversion demonstrates high signal-to-noise ratio, which means during the experiment, the sensor doesn't need to be deployed on current path, and under situations when no lightning current such as natural lightning can be directly measured, this inversion method can help obtain the time-varying waveform in process of continuous discharging.

Description

technical field [0001] The invention belongs to the technical field of measuring the discharge process of artificially induced lightning, and in particular relates to a method for measuring the initial continuous current of artificially induced lightning (and lightning induced by high buildings) and the short-range remote sensing method for measuring the continuous current of ground flashback by using low-frequency magnetic field antenna remote sensing. Background technique [0002] Artificial lightning induction is an important technical means to study the physical mechanism of lightning process. By launching a small rocket that drags a metal wire from the ground, the ground zero potential can be introduced into the high electric field environment at the bottom of the thunderstorm cloud, thereby forming a continuous discharge process and finally forming lightning. As a highly controllable lightning measurement method, this method has been used to study the physical process ...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for measuring the initial continuous current of artificially induced lightning by using low-frequency magnetic field antenna remote sensing, aiming to solve the limitation that the sensor needs to be placed on the lightning current path in the current measurement method at the bottom of the channel, and to solve the problem of lightning current measurement. The weak current resolution ability is insufficient, and the problem of accurately reconstructing the details of the initial continuous current cannot be realized

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