PSN-L Email List Message

Subject: Re: Newbie trying to get started
From: Steinar Midtskogen steinar@.............
Date: Sat, 21 Jun 2008 20:04:08 +0200


[rsparks]

> Use the formula y[n] = c0*x[n] + c1*x[n-1] + c2*y[n-1] (from Press)

Thanks.  I'm not sure where to start to find useful values for the
constants, though.  Perhaps I should log raw data for a while and wait
for quakes which I should be able to detect, and then try different
combinations to see what makes local noise weaker while preserving the
quake signature.

My plots at http://voksenlia.net/met/seismometer/ (latest 24 hours)
currently show several spikes, all of which were caused by me staying
in the room.  I can easily play with some simple filters to surpress
these, but I can't yet know whether that will also kill interesting
seismic signals.

I plan to publish my code when I have something that seems to work
well.

-- 
Steinar ; NIL DIFFICILE VOLENTI ; http://latinitas.org ; http://voksenlia.net
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