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Entry  Sat Nov 13 15:53:05 2010, yuta, Update, CDS, diagonalization of MC input matrix MCspectraNov09.pngMCspectraNov13.pngMC1spetra_wrongmatrix.png
    Reply  Sun May 15 03:58:19 2011, rana, Update, CDS, diagonalization of MC input matrix mc1.png
       Reply  Thu May 19 00:23:44 2011, rana, Update, CDS, diagonalization of MC input matrix 
       Reply  Sun Jun 26 16:17:22 2011, rana, Update, CDS, diagonalization of MC input matrix inMatDiag.pdf
          Reply  Mon Aug 8 00:12:58 2011, rana, Update, CDS, diagonalization of MC input matrix 
             Reply  Mon Aug 8 00:58:26 2011, rana, Update, CDS, diagonalization of MC input matrix null.png
                Reply  Wed Aug 10 00:21:10 2011, jamie, Update, CDS, updates to peakFit scripts 
                Reply  Sat Aug 27 15:47:59 2011, rana, Update, CDS, OSEM noise / nullstream and what does it mean for satellites Untitled.png
                   Reply  Wed Nov 30 01:35:49 2011, Jenne, Update, CDS, OSEM noise / nullstream and what does it mean for satellites 
             Reply  Mon Aug 8 19:45:27 2011, jamie, Update, CDS, activateDQ script run; SUS channels being acquired again 
Message ID: 4718     Entry time: Sun May 15 03:58:19 2011     In reply to: 3912     Reply to this: 4746   4886
Author: rana 
Type: Update 
Category: CDS 
Subject: diagonalization of MC input matrix 

There has been some input matrix diagonalization in the past by Yuta and Kiwamu, but I find the automation to be not totally satisfactory.

It would be better if we could automatically fit the data to find the Suspended optic eigenfrequencies and then use that to get the matrix. So I wrote a peak fitter to get the matrix.

It gets the data from mafalda with NDS2, then it makes the PSDs, and then starts with some initial guesses (based on looking at the plots) and them uses fminsearch to get the peak frequencies and Q's.

Using the output of this, we can use Yuta's method and take the passive transfer functions with the free swing data (from April 30, so we got do do it quick) to get the input matrix.

 

Doing the SUS input matrix is nice for having good damping (as long as we remember to include SIDE), but my motivation is to produce a good null stream from the 4 face sensors so that we can estimate the sensor noises at all times.

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