Temporal features of different lightning events revealed from wavelet transform

►The wavelet transform technique is used to analyze various lightning events. ►PB pulses are found to radiate in the average frequency range of 51-739 kHz. ►Leaders are found to radiate in the frequency range of 87-720 kHz and narrow bipolar pulses radiate from 58 to 714 kHz. ►The energy radiated by the negative return strokes is predominant in the range of 2.8-40 kHz. ►Positive return strokes are found to radiate predominantly in the frequency range of 5.5-81.