PSN-L Email List Message

Subject: RE: Real time FFT
From: "Timothy Carpenter" GeoDynamics@.......
Date: Tue, 28 Jun 2005 23:53:28 -0400

Can you steer me to some references in the use of FFT results for
identifying and triggering on teleseismic and other events? I scanned
through the on-line info for WinSDR 2.0.8 B4 but couldn't find any clues
about where to look next. I have not downloaded WinSDR -- if there is
guidance w/r FFTs embedded in the pgm, let me know and I'll download it. =


Timothy Carpenter, P.E., Pres.,
GeoDynamics Consultants, Inc.
5043 Whitlow Ct.
Commerce Twp., Mi 48382
248-363-4529 (voice & fax)
248-766-1629 (cell)
geodynamics@........... (primary)
geodynamics@....... (secondary)

-----Original Message-----
From: psn-l-request@.............. [mailto:psn-l-request@............... =
Behalf Of Larry Cochrane
Sent: Tuesday, June 28, 2005 8:52 PM
To: psn-l@..............
Subject: Re: Real time FFT

Hi Dick,

The current version of WinSDR
does an FFT on the incoming data from the A/D board to detect =
events. It=20
seems to work OK most of the time.

Larry Cochrane
Redwood City, PSN

Richard Webb wrote:
> Hi,
> I was wondering if it is possible to do FFTs on the fly as a means of=20
> differentiating earthquakes from environmental noise (cars, =
> wind, etc.).  From what I have read, their FFT signatures for these=20
> items are quite different.  Can it be done with WINSDR or other =
> that can be used in conjunction with WINSDR.
> Dick
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