In the help document of SeismoSignal, the baseline correction is introduced as follows:
"Baseline Correction, as implemented in SeismoSignal, consists in (i) determining, through regression analysis (least-squares-fit method), the polynomial curve that best fits the time-acceleration pairs of values and then (ii) subtracting from the actual acceleration values their corresponding counterparts as obtained with the regression-derived equation."
The saying , quotes "the polynomial curve that best fits the time-acceleration pairs of values" , seems inaccurate. To my knowledge, in order to to remove the shift of displacement time-history, we try to find the polynomial curve that best fits displacement time-history pairs of values other than that of the time-acceleration. Perhaps my understanding is wrong.
Looking forward to one explanation. Thank you.
Question about the baseline correction
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seismosoft
- Posts: 1271
- Joined: 06 Jul 2007, 04:55
Re: Question about the baseline correction
Dear seismech,
We can confirm that filtering and baseline correction are indeed applied to the acceleration time-history, even when the end objective is that of eliminating residual shifts from the corresponding displacement time-history (obtained through double-integration, in time, of the accelerogram).
Seismosoft Support
We can confirm that filtering and baseline correction are indeed applied to the acceleration time-history, even when the end objective is that of eliminating residual shifts from the corresponding displacement time-history (obtained through double-integration, in time, of the accelerogram).
Seismosoft Support