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 Wed Nov 11 12:50:10 2009, Jenne, Update, PEM, Seismometer Noise Characteristics 
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 Thu Apr 22 20:28:40 2010, Jenne, Update, PEM, Seismometer Noise Characteristics
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Thu May 27 23:59:54 2010, rana, Update, PEM, New Foam Box installed
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Fri May 28 00:40:53 2010, rana, Update, PEM, DAQ down
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Fri May 28 10:44:47 2010, josephb, Update, PEM, DAQ down
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Tue Jun 8 18:39:36 2010, rana, Update, PEM, DAQ down
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Tue Jun 8 20:52:25 2010, josephb, Update, PEM, DAQ up (for the moment)
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Fri May 28 11:26:35 2010, Jenne, Update, PEM, New Foam Box installed
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Tue Jun 1 11:47:14 2010, steve, Update, PEM, lead balls on concrete
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Wed Jun 9 19:47:08 2010, nancy, Update, PEM, lead balls on concrete
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Thu Jun 10 07:53:14 2010, Alberto, Update, PEM, LaTeXlabs
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Thu Jun 10 10:58:02 2010, Koji, Update, General, LaTeXlabs
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Thu Jun 10 11:10:21 2010, Alberto, Update, General, LaTeXlabs
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Message ID: 2237
Entry time: Wed Nov 11 12:50:10 2009
Reply to this: 2833
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| Author: |
Jenne |
| Type: |
Update |
| Category: |
PEM |
| Subject: |
Seismometer Noise Characteristics |
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The attached plot shows the spectra of the 3 Z axes of the 3 seismometers we have (this data is from ~20Aug2009, when the Ranger was in the Z orientation) in Magenta, Cyan and Green, and the noise of each of the sensors in Red, Blue and Black. The noise curves were extracted from the spectra using the Huddle Test / 3 Corner Hat method. The Blue and Black traces which are just a few points are estimates of the noise from other spectra. The Blue points come from the Guralp Spec Sheet, and the Black comes from the noise test that Rana and I did the other day with the Ranger (elog 2223).
I'm not really happy with the black spectra - it looks way too high. I'm still investigating to see if this is a problem with my calibration/method.... |
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