PSN-L Email List Message
Subject: Re: Status of the PSN file format / capacitive measurements
From: Larry Cochrane lcochrane@..............
Date: Sat, 15 Oct 2005 12:53:21 -0700
I can answer your first questions. The PSN 3/4 file format is not proprietary, so it
can be used by any application and WinQuake is not open-sourced.
Redwood City, PSN
> Hi list,
> 2 Questions:
> I'd like to know how 'official' the PSN file format is. It is well
> described, and i'd like to let my measurement equipment also output a
> PSN file. However, i only seen a few applications that use it (winquake
> etc), which is a (semi?) commercial/paid application. However, the file
> format seems standard in the PSN network, so i like to comply to that
> standard. Is PSN3/4 file format a propierity standard or can it also
> freely be used by other aplications, and/or is it considered the
> winquake applications to be open-sourced?
> Is there any documentation on using capacitive measurements instead of
> the coil based ones? So far i saw all lehman-typed instruments equiped
> with a pickup coil. With my testing equipment i used two capacitor
> plates, each about 30cm2 large, at about 3-5 mm of eachother. On that is
> an variabele oscillator attached, with pulse counting i determinate
> position of the arm with reasonable success but no hard data on
> resolution. I am wondering if there ary any known disadvantages of such
> setup, i think it is suitable to build a Shackleford-Gundersen type this
> way as well.
> kind regards,
> Public Seismic Network Mailing List (PSN-L)
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