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Entry  Tue Aug 9 02:27:54 2011, Ishwita , Manuel, Update, PEM, Power spectra and Coherence of Guralps and STS2 Coher_gur1_gur2_BW0.01.pngCoher_gur1_sts1_BW0.01.pngCoher_sts1_gur2_BW0.01.pngPw_gurs_correct.pngPw_gur1_sts1_correct.png
    Reply  Thu Aug 11 16:21:16 2011, Ishwita , Manuel, Update, PEM, Power spectra and Coherence of Guralps and STS2 Pw_gur1_sts1_correct.png
Message ID: 5148     Entry time: Tue Aug 9 02:27:54 2011     Reply to this: 5197
Author: Ishwita , Manuel 
Type: Update 
Category: PEM 
Subject: Power spectra and Coherence of Guralps and STS2 

We did offline wiener filtering on 3rd August (Elog entry) using only Guralps' channels X and Y.

Here we report the Power spectrum of the 3 seismometers (Guralp1, Guralp2, STS1) during that time.

and also the coherence between the data from different channels of the 3 seismometers.

We see that the STS is less correlated with the two Guralps. We think it is due to the wrong alignment of the STS with the interferometer's axes.

We are going to align the STS and move the seismometers closer to the stacks of the X arm.

 Pw_gurs_correct.png

 

 


 Pw_gur1_sts1_correct.png


 

 


 

 Coher_gur1_gur2_BW0.01.png

 

 



Coher_gur1_sts1_BW0.01.png

 

 



Coher_sts1_gur2_BW0.01.png

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