Signal character analysis of lightning in nuclear explosion infrasound detection

The paper analyzes character of lightning infrasonic signal detected in nuclear infrasound monitor system. After mean removal, atmosphere disturb removal, filter, unitary dispose, statistical theory is used to analyze the frequency character of infrasonic signals. According to the statistical conclusion the power spectrum of lightning is gotten. The result show that the character of power spectrum of lightning infrasonic signal is different from nuclear explosion infrasonic signal, eigenvalues can be got from this character for identification and classification of nuclear explosion infrasonic detection. (authors)