PSN-L Email List Message
Subject: Real time traces
From: Brett Nordgren brett3nt@.............
Date: Thu, 13 Aug 2009 15:47:26 -0400
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
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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