The Analysis of Return Strokes Electromagnetic Environment at the Top of Building Affected by the Widths and Relative Position
In the lightning monitoring and early warning work,due to the terrain limitation,the lightning monitoring system is usually arranged on the top of the building,which will lead to a large error in the lightning parameters of the system inversion.Therefore,the influence degree is quantita-tively analyzed by simulation means to provide reference for the correction of the positioning results.In this paper,the altitude of building is fixed by using finite-difference time-domain method(FDTD)to examined the building's width and relative location influence on electromagnetic field of lightning return strokes.The relation between the width of the building and the proportion of vertical electric field increase and its fitting curve are obtained.The result shows that the increase of the ver-tical electric field M reduces when the building width increases,and remains in a small range when the building width increases to a certain extent;when the distance d between the building and the lightning passage increases to 3.22 km,the influence of the width of the building on the vertical electric field value at the top of the building is negligible.This research result gives certain reference to improve the accuracy of lightning location system.
the width of the buildingthe relative positionlightning return-stroke electromagnetic fields
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