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Entry  Wed Feb 24 16:11:15 2010, Jenne, Update, PEM, Seismic witnesses near MC1 tank moved 
    Reply  Sun Mar 7 23:05:39 2010, rana, Update, PEM, Seismic witnesses near MC1 tank moved seis.png
       Reply  Mon Mar 8 18:15:27 2010, rana, Update, PEM, Styrofoam Cooler on the Seismos SeismometersHuddled.jpg
          Reply  Tue Mar 9 12:06:53 2010, rana, Jenne, Update, PEM, Styrofoam Cooler on the Seismos 
             Reply  Wed Mar 10 15:02:58 2010, rana, Update, PEM, Styrofoam Cooler on the Seismos Seismic-Ref_100310.pngUntitled.gif
                Reply  Sat Mar 13 21:30:22 2010, rana, Update, PEM, Styrofoam Cooler on the Seismos Untitled.png
                   Reply  Mon Mar 15 16:39:36 2010, steve, Update, PEM, Guralp2 centered grlp2ffst.jpg
                      Reply  Thu Mar 18 08:49:51 2010, steve, Update, PEM, Guralp2 centered again ? grlp2xadj.jpg
                         Reply  Fri Mar 19 18:00:14 2010, jenne, Update, PEM, Guralp2 centered again 
                            Reply  Fri Mar 19 21:15:33 2010, rana, Update, PEM, Guralp2 centered again Untitled.png
                            Reply  Fri Mar 19 23:03:41 2010, rana, Update, PEM, Guralp2 centered again huddlez.png
                               Reply  Sun Mar 21 19:25:29 2010, rana, Update, PEM, Guralp2 centered again huddlez.png
                               Reply  Thu Mar 25 09:07:08 2010, steve, Update, PEM, Guralp2 x problem is back grlp2xproblm.jpg
                                  Reply  Wed Mar 31 16:31:44 2010, steve, Update, PEM, Guralp interface box turned off grlpntrfcbxoff.jpg
                                     Reply  Mon Apr 5 01:02:07 2010, rana, Update, PEM, Guralp interface box turned off Untitled.png
Message ID: 2743     Entry time: Wed Mar 31 16:31:44 2010     In reply to: 2713     Reply to this: 2764
Author: steve 
Type: Update 
Category: PEM 
Subject: Guralp interface box turned off 

Quote:

Quote:

I went and double-checked and aligned the styrofoam cooler at ~5:00 UTC. It was fine, but we really need a better huddling box. Where's that granite anyway?

Here's the new Huddle Test output. This time I show the X-axis since there's some coherence now below 0.1 Hz.

You'll also notice that the Wiener filter is now beating the FD subtraction. This happened when I increased the # of taps to 8000. Looks like the noise keeps getting lower as I increase the number of taps, but this is really a kind of cheat if you think about it carefully.

 The same thing happening again.  The intermittent offset upstream of the seismometer that never got fixed.

The granite plate and ball bearings are in. I will place seismometers on it.

 

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