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Travel time estimation from a transfer function in frequency domain: The revised Sompi event analysis

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羽佐田 葉子; 熊澤 峰夫; 鶴我 佳代子; 國友 孝洋

Hasada, Yoko; Kumazawa, Mineo; Tsuruga, Kayoko; Kunitomo, Takahiro

周波数領域の伝達関数から時間領域の「イベント」を抽出する手法である、存否イベント解析法を開発してきた。この手法は、ACROSSの基本的な解析法のひとつである。存否イベント解析法の有効性は、様々な数値テストで確認されているが、実用にはいくつかの問題がある。ここでは、重みつき最小二乗法を用いた存否イベント解析法の改良を紹介する。

We have developed a method to extract "events" localized in time domain from a transfer function in frequency domain, which is a basic analysis method of ACROSS(Accurately Controlled Routinely Operated Signal System)and referred to as the Sompi event analysis. Though the validity of the Sompi event analysis is confirmed through various numerical tests especially for analysis of dispersive wave, there are some problems in practical application. Here we introduce a revised procedure by means of weighted least squares fitting, which is based on maximum likehood estimation.

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