TY - JOUR ID - 18985 TI - - JO - Journal of the Earth and Space Physics JA - JESPHYS LA - en SN - 2538-371X Y1 - 2007 PY - 2007 VL - 33 IS - 2 SP - EP - KW - Frequency resolution KW - Short time Fourier transform KW - The S transform KW - Wavelet transform KW - Hyperbolic window S transform KW - time DO - N2 - The S transform is a type of time-frequency analysis transform composed of some concepts of short time Fourier transforms (STFT) and wavelet transform. To localize time-frequency spectrum in this method, a scalable Gaussian window is used. The scalable Gaussian window provides time-frequency resolution while maintaining a direct relationship with the Fourier spectrum. In this study, after introducing the S transform, generalized S transform is introduced and its application in first arrival time estimation of noisy seismic records is presented. UR - https://jesphys.ut.ac.ir/article_18985.html L1 - https://jesphys.ut.ac.ir/article_18985_d5ca8568d019dd3727714fd763ca6230.pdf ER -