Ultra-long distance lightning intensity inversion algorithm considering influence of earth curvature radius

Abstract

The invention relates to an ultra-long distance lightning intensity inversion algorithm considering the influence of the earth curvature radius, and the algorithm comprises the steps: carrying out the normalization of lightning signals at different distances from an observation point to a preset distance according to the propagation law of a lightning electromagnetic field along the earth surface; if the distance between the lightning signal and the observation point is greater than 200km, setting the attenuation rule of the electric field amplitude EPEAK of the lightning signal as d-1.32 along with the increase of the observation distance d; if the distance between the lightning signal and the observation point is less than 200km, setting the attenuation rule of the electric field amplitude EPEAK of the lightning signal as d-1 along with the increase of the observation distance d; when thunder and lightning occur, acquiring a magnetic field intensity peak value of the thunder and lightning at the observation point; and inverting a lightning current peak value according to the magnetic field intensity peak value. The lightning current peak value estimation model established by the algorithm provides technical support for service applications such as thunder and lightning detection and early warning and forecasting of disastrous weather.

Description

technical field [0001] The present application relates to the field of lightning electromagnetic wave propagation and lightning detection technology, in particular to an ultra-long-distance lightning intensity inversion algorithm considering the influence of the radius of curvature of the earth. Background technique [0002] On a global scale, hundreds of lightning strikes occur every second, and frequent lightning strikes will release electromagnetic waves with frequencies ranging from extremely low frequency to ultrahigh frequency. In actual work, researchers can use different detection instruments to detect lightning radiation corresponding to different wave bands, and then determine the spatial position of lightning discharge and parameters such as discharge parameters. However, because electromagnetic waves in different frequency bands will be affected by factors such as soil conductivity, surface ups and downs, and the earth's ionospheric dielectric during transmission...

AI Technical Summary

Problems solved by technology

[0007] This application provides an ultra-long-distance lightning intensity inversion algorithm considering the influence of the earth's curvature radius to solve the problem that traditional methods cannot obtain accurate long-distance lightning electromagnetic field characteristics

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