Examination on Detection of Characteristic Time of Transient Signal by Theory of Natural Observation Method

摘要

Temporal fluctuation of electromagnetic fields signals such as the atmospheric electricity variation observed in the natural environment is very complicated. In analysis of the observed waveform, it becomes sometimes important to decide accurately the time which characterizes the waveform, such as an inflection point. In this paper, it is shown that the inflection point of the model waveform can be clearly detected by applying the filter based on the theory of natural observation method. And, it is reported that the inflection point can be also detected with high accuracy when the random noise was superimposed on the waveform.