| Title |
Waveform Parameters of the Electric and Magnetic Fields Radiated Form Lightning Return Strokes |
| Authors |
Bok-Hee Lee ; Young-Hwan Baek ; Woo-Cheol Lee |
| Keywords |
Lightning return stroke ; lightning electric and magnetic fields ; waveform parameter ; rise time ; zero-to-zero crossing time |
| Abstract |
This paper deals with the physical properties and statistical analysis of waveform parameters of electric and magnetic fields radiated from lightning return strokes. The lightning electric and magnetic fields were detected by an plate-type electric field sensor and a loop-type magnetic field sensor respectively, and they were recorded by a data acquisition system having a resolution of 12bits, a sampling rate of 10[MS/s] and recording length of 10[㎳]. As a result, a little difference between the parameters of electric and magnetic fields for positive and negative polarities was observed. The rise times of electric and magnetic fields were within the range of less than 13[㎲] and the average values for positive and negative polarities were 4.1[㎲] and 4.2[㎲], respectively. The average values of the zero-to zero crossing times were 65.2[㎲] and 67.0[㎲], and the average depths of the dip to opposite polarity were 38.0[%] and 40.3[%], for positive and negative polarities, respectively. |