Seismosoft | Earthquake Engineering Solutions

In the software of SeimoSignal, if we input the hisotory of acceleration, SeimoSignal could compute the Fourier and Power Spetrum. I am truely concerned about how SeimoSignal transforms the Fourier Spetrum into Power Spetrum. I am wondering if I could be offered the concrete formulas, for as far as I know, we are unable to obtain the transformation based on only one history of acceleration. Thanks!
My Email:lbwhu@hotmail.com

We can confirm that it is indeed possible to obtain Power Spectrum from a given record.
Please do refer to extensive printed and online literature on the subject; a Google search will already provide you with plenty of clues, and so will a read through some of the references provided in the Help System, or a consultation of Help System of specialised applications such as a Matlab and so on.

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