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Message ID: 771     Entry time: Wed Dec 28 01:30:46 2011
Author: Frank 
Type: DailyProgress 
Category: Seismic 
Subject: Accelerometer noise floor and table seismic noise 

Measured the noise floor of the accelerometer to compare it with the seismic noise we measure with it (and the TFs i want to measure). Suspended it from the table using a very soft spring to make it quiet enough. Resonance frequency of suspension was ~1Hz (small peak visible in spectrum, damping of the thing took forever).

P1810534.JPG

Seismic noise of the table is hitting the noise floor of the accelerometer at about 10Hz. Couldn't find the raw data from the seismometer measurements. Will update this later.

accelerometer.png

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