ELOG - Power spectra and Coherence of Guralps and STS2

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Tue Aug 9 02:27:54 2011, Ishwita , Manuel, Update, PEM, Power spectra and Coherence of Guralps and STS2

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.