## PSN-L Email List Message

**
Subject: WinQuake integration**

From: Robert McClure bobmcclure90@.........

Date: Sun, 22 Nov 2009 21:28:41 -0500

If you set the original data type to acceleration, WinQuake allows you
to integrate twice, but you are not likely to be pleased with what you
get, unless the DC level of the data is very stable.
Roger Sparks wrote:
For some reason, I got to thinking about the difference between
acceleration and velocity detectors today, maybe prompted by your
comment (a few days ago) about using WinQuake to double integrate the
data to convert acceleration data to displacement data. The problem is
that WinQuake (so far as I can determine) does not allow double
integration of the data. Only one integration operation is allowed.
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