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Entry  Fri Jul 17 02:46:07 2015, Ignacio, Update, General, New huddle test data for Wilcoxon 731A results 6x
    Reply  Tue Jul 21 05:17:09 2015, Ignacio, Update, General, More clear accelerometer huddle tests results new_data.pngnew_data.pngold_data_1.pngold_data_1.pngold_data_2.png
       Reply  Thu Jul 23 21:12:14 2015, Ignacio, Update, General, Newer accelerometer huddle test data + detrending old_data_1.pngold_data_2.pngnew_data.pngsix_old_data.png
          Reply  Tue Jul 28 09:31:35 2015, Ignacio, Update, General, Newest accelerometer huddle test selfnoise_allsix_miso_newest.png
Message ID: 11450     Entry time: Tue Jul 28 09:31:35 2015     In reply to: 11442
Author: Ignacio 
Type: Update 
Category: General 
Subject: Newest accelerometer huddle test 

I downloaded new accelerometer huddle test data from last night and analyzed it. This new data set is ~55 mins and uses the same Wiener filter parameters as previous huddle test analysis, the main difference being six accelerometers used in the Wiener filter and the improved experimental set up.

After computing the ASD for the self noise for each of the six accelerometers, (being witnessed by the remaining five), we get,

Now computing the mean of the above signals and the corresponding error bars gives the following result,

Comparing to prevoius huddle tests, I can note two trends on the Wiener subtraction:

1) When using six accelerometers, the subtraction above ~8 Hz drastically improves.

2) When using three accelerometers, there is better cancellation in the 1-5 Hz region, see http://nodus.ligo.caltech.edu:8080/40m/11442. This might have to do with how much more closer the accelerometers are to each other? 

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