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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: 15023
Entry time: Wed Nov 13 20:15:56 2019
In reply to: 15022
Reply to this: 15024
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| Author: |
rana |
| Type: |
Update |
| Category: |
PEM |
| Subject: |
Follow-up on seismometer discussion |
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this is due to the Equivalence Principle: local accelerations are indistinguishable from spacetime curvature. On a spherical Earth, the local gradient of the metric points in the direction towards the center of the Earth, which is colloquially known as "down".
| Quote: |
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I don't understand why the z-axis motion reported by the T240 is ~10x lower at 10 mHz compared to the X and Y motions. Is this some electronics noise artefact?
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