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Message ID: 860     Entry time: Wed Aug 20 12:04:47 2008
Author: Jenne 
Type: Update 
Category: SUS 
Subject: Better diagonalization of PRM input matrix 
The values here should replace those in entry #851 from yesterday.

After checking the results of the input matrix diagonalization, I have determined that Sonia's method (described in LIGO-T070168) is more effective at isolating the eigenmodes than Shihori's method (LIGO-T040054).

So, the actual new PRM input matrices are as follows:

POSPITYAW
UL0.96781.0000.7321
UR1.0000.8025 -0.9993
LR0.7235 -1.1230 -1.0129
LL0.6648 -1.04521.0000


Attached are plots of the spectra of the eigenmodes, using both Shihori's and Sonia's methods. Note that there isn't a good way to get the side peak out of the eigenmodes.

I've put these into the SUS-PRM MEDM screen.
Attachment 1: PRM_Eigmodes_shihori.png  16 kB  | Hide | Hide all
PRM_Eigmodes_shihori.png
Attachment 2: PRM_Eigmodes_sonia.png  16 kB  | Hide | Hide all
PRM_Eigmodes_sonia.png
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