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| 40m Log |
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 Tue Oct 8 08:08:18 2019, gautam, Update, PEM, PEM BLRMS anomaly 
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 Wed Oct 23 11:49:21 2019, gautam, Update, PEM, PEM BLRMS anomaly
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Thu Oct 24 18:37:15 2019, gautam, Update, PEM, T240 checkout
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Tue Nov 5 12:37:50 2019, gautam, Update, PEM, T240 interface unit pulled out
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Wed Nov 13 19:34:45 2019, gautam, Update, PEM, Follow-up on seismometer discussion
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Wed Nov 13 20:15:56 2019, rana, Update, PEM, Follow-up on seismometer discussion
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Wed Nov 13 23:40:15 2019, gautam, Update, PEM, Follow-up on seismometer discussion
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Thu Nov 14 12:11:04 2019, rana, Update, PEM, Follow-up on seismometer discussion
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Fri Nov 15 00:18:41 2019, rana, Update, PEM, Follow-up on seismometer discussion
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Fri Nov 15 12:16:48 2019, gautam, Update, PEM, Follow-up on seismometer discussion
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Mon Nov 18 14:32:53 2019, gautam, Update, PEM, Follow-up on seismometer discussion
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Tue Nov 19 21:53:57 2019, gautam, Update, PEM, Follow-up on seismometer discussion
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Message ID: 15030
Entry time: Fri Nov 15 12:16:48 2019
In reply to: 15027
Reply to this: 15032
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| Author: |
gautam |
| Type: |
Update |
| Category: |
PEM |
| Subject: |
Follow-up on seismometer discussion |
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Attachment #1 is a spectrogram of the BS sesimometer signals for a ~24 hour period (from Wednesday night to Thursday night local time, zipped because its a large file). I've marked the nearly pure tones that show up for some time and then turn off. We need to get to the bottom of this and ideally stop it from happening at night because it is eating ~1 hour of lockable time.
We considered if we could look at the phasing between the vertex and end seismometers to localize the source of the disturbance. |
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