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Message ID: 6695     Entry time: Sun May 27 23:15:22 2012
Author: Den 
Type: Update 
Category: PEM 
Subject: experiments with seismometers 

I wondered if linoleum is a reason of high Guralp noise. I measured Guralp noise in 3 cases: they stand on a very soft piece of paper, linulium and stone.

DSC_4309.JPG               DSC_4310.JPG                  DSC_4311.JPG

I've calibrated the noise to units m/s/sqrt(Hz). Using soft paper we get the worst noise, stone - the best, but noises do not differ that much and still much worse then declared noise in the manual.

loc_noise.png

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