PSN-L Email List Message
Subject: Re: Real time traces
From: Karl Cunningham karlc@..........
Date: Thu, 20 Aug 2009 21:11:57 -0700
Please excuse the tardiness of this reply.
Congratulations on your progress and good looking data.
I can see from the photo on the web page roughly what the instrument is
and how it's constructed. Other than the links already mentioned in this
thread, have you published a description of the design and/or schematics
of the electronics?
Sorry if this has been covered here before. I've been away from
monitoring the PSN list for some time, and a brief review of the
archives didn't turn up a description.
Curious minds want to know...
Brett Nordgren wrote:
> Hello All,
> We just put up a Web page which displays some near real time outputs
> from two of our experimental vertical feedback seismographs. There are
> displays showing three different combinations of sensitivity and
> low-pass filtering, which highlight different types of ground motion.
> Currently these are updated every 30 minutes, though in the future we
> may be able to reduce the update interval. As these are experimental
> instruments, it may happen that they will occasionally be off line as we
> make improvements.
> We sometime see short data dropouts, possibly related to the convoluted
> data path we use to distribute the gif's. Data starts in Dave Nelson's
> seismo vault in California, arrives via the Internet at my WinSDR client
> in New Jersey where the gif files get generated. They then are uploaded
> to my Web site, hosted in Pittsburgh... and so on. I am still working
> to figure out the cause of the data drops. Suggestions welcomed.
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