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Entry  Thu Aug 13 20:32:07 2015, Ignacio, Update, LSC, Working towards YARM FF  
    Reply  Thu Aug 13 23:57:33 2015, Ignacio, Update, LSC, YARM coherence plots YARM_psd.pngYARM_GUR1_COH.pngYARM_STS_COH.pngYARM_GUR1_COH.png
    Reply  Fri Aug 14 21:40:26 2015, Ignacio, Update, LSC, Quick static offline subtractions of YARM arms_wiener.png
    Reply  Sat Aug 15 02:10:35 2015, Ignacio, Update, LSC, MCL FF => YARM FF YARM_LIVES.png
    Reply  Wed Aug 19 00:55:35 2015, Ignacio, Update, LSC, LSC-YARM-EXC to LSC-YARM-IN1 TF measurement + error analysis master_plot.pngcoherence.png
Message ID: 11508     Entry time: Fri Aug 14 21:40:26 2015     In reply to: 11503
Author: Ignacio 
Type: Update 
Category: LSC 
Subject: Quick static offline subtractions of YARM 

Plotte below are the resultant subtractions for YARM using different witness configurations,

The best subtraction happens with all the channels of both the GUR1 and T240 seismometers, but one gets just as good subtraction without using the z channels as witnesses. 

Also, why is the T240 seismometer better at subtracting noise for YARM compared to what GUR1 alone can acomplish? Using only the X and Y channels for the T240 gave the third best subtraction(purple trace). 

My plan for now is as follows:

1) Measure the transfer function from the ETMY actuator to the YARM control signal

2) Collect data for YARM when FF for MCL is on in order to see what kind of subtractions can be done.

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