@article{oai:nipr.repo.nii.ac.jp:00006286,
 author = {Tsunezawa,Kayoko and Tonegawa,Yutaka and Sakurai,Tohru},
 journal = {Advances in polar upper atmosphere research},
 month = {Sep},
 note = {P(論文), We have developed an algorithm for automatic detection of the onset of Pi 2 pulsations by using the wavelet transform. It is found that the Cauchy wavelet with proper parameters has a time resolution higher than that of the Gabor wavelet, and is suitable for detecting Pi 2 onset. It is revealed that the time of power peak of the Cauchy wavelet transform is given within one to three minutes after the onset of Pi 2. This time lag has been automatically compensated in the present algorithm, and it is shown that the onset time of almost all Pi 2 events can be determined with an accuracy of one minute.},
 pages = {154--161},
 title = {Detection of the onset time of Pi 2 pulsations by using wavelet analysis},
 volume = {13},
 year = {1999}
}