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ID Date Author Type Category Subject Text   2548   Tue Jan 26 19:51:44 2010 Sanjit, rana Update Adaptive Filtering OAF details We turned on the OAF again to make sure it works. We got it to work well with the Ranger as well as the Guralp channels. The      2555   Mon Feb 1 18:31:00 2010 Sanjit Update Adaptive Filtering OAF details   I tried downsampling value 32 (instead of 16), to see if it has any effect on OAF. Last week I encountered some      2557   Mon Feb 1 21:51:12 2010 Sanjit Update Adaptive Filtering OAF details  I tried some combination of PEM channels and filters to improve OAF performance at other frequencies, where we do not have      2571   Fri Feb 5 00:52:55 2010 Sanjit Update Adaptive Filtering OAF at 0.1-1.0 Hz   At 0.1-1.0Hz, there is some coherence between MC_L and RANGER_Y & GUR_Y, see      2572   Fri Feb 5 01:04:58 2010 Sanjit Update Adaptive Filtering OAF at > 5Hz   There is lot of coherence between the error signal and PEM channels at 5-100Hz.      2575   Sat Feb 6 00:10:08 2010 Sanjit Update Adaptive Filtering OAF at > 5Hz   Did some more test to get better performance at higher frequencies.      4854   Wed Jun 22 12:29:57 2011 Ishwita Summary Adaptive Filtering Weekly summary I started on the 16th with a very intense lab tour & was fed with a large amount of data (I can't guarantee that I remember      5402   Wed Sep 14 01:21:17 2011 Jenne Update Adaptive Filtering Modifications to LSC, RFM models, added OAF model [Jenne, Mirko, with supervision from Jamie] We are starting to create the new OAF model, so that it works with the new      5404   Wed Sep 14 12:01:05 2011 rana Update Adaptive Filtering Modifications to LSC, RFM models, added OAF model For the acquisition of the MC_F channel, I suggest taking the FAST_MON BNC output from the blue FSS interface card in the Eurocard      5449   Sun Sep 18 15:34:09 2011 Koji Update Adaptive Filtering Modifications to LSC, RFM models, added OAF model [Koji Kiwamu] This modification of the LSC model made the rows      5550   Mon Sep 26 18:59:11 2011 Jenne Update Adaptive Filtering Plan for making MC_F                                5555   Tue Sep 27 09:47:52 2011 Suresh Update Adaptive Filtering Plan for making MC_F                                5557   Tue Sep 27 11:52:33 2011 Jenne Update Adaptive Filtering Plan for making MC_F                    5572   Wed Sep 28 22:30:01 2011 Jenne Update Adaptive Filtering OAF is disabled I am leaving the OAF disabled, so there should be nothing      5575   Thu Sep 29 11:25:55 2011 Jenne Update Adaptive Filtering Tried new c-code, Fail. [Mirko, Jenne] Mirko edited the c-code to use Den's stuff that he put in the elog last night.       5576   Thu Sep 29 12:56:27 2011 Jenne Update Adaptive Filtering Meditations on the OAF [Mirko, Den, Jenne] We're modifying the c1oaf model, and we got to talking about the "Fx"      5602   Mon Oct 3 16:18:05 2011 Jenne Update Adaptive Filtering Meditations on the OAF                                5730   Mon Oct 24 19:48:16 2011 Mirko Update Adaptive Filtering Filter execution time Toyed around some more with the adaptive filters. Execution time: nTaps         5738   Tue Oct 25 20:04:40 2011 Mirko Update Adaptive Filtering Adaptive filter witness and EP SNR We currently have the code running for all DOFs using all witness channels. By default nothing is applied. C-Code parameters can      5740   Tue Oct 25 21:49:13 2011 Den Update Adaptive Filtering Adaptive filter witness and EP SNR                  5772   Mon Oct 31 19:39:00 2011 Jenne Update Adaptive Filtering Screens, code, computers [Mirko, Jenne] I finished (mostly? maybe?) the OAF screens.  They're pretty awesome.       5777   Tue Nov 1 18:16:50 2011 Den Update Adaptive Filtering Adaptive filter witness and EP SNR                                5810   Fri Nov 4 14:18:24 2011 MIrko Update Adaptive Filtering Coherence between seismometers and MC length Looking into the coherence between the seismometers and IMC length (MC_F): FIrst with the seismometers only      5811   Fri Nov 4 15:24:13 2011 Mirko Update Adaptive Filtering Adaptive FF on the MC doesn't make sense [Den, Jenne, Mirko]      5816   Fri Nov 4 21:52:58 2011 Den Update Adaptive Filtering coherence [Mirko, Den] We still think about the coherence between seismic noise and mode cleaner length.      5825   Sun Nov 6 21:09:03 2011 rana Update Adaptive Filtering coherence                                5835   Mon Nov 7 16:42:56 2011 Jenne Update Adaptive Filtering BLRMS's to monitor OAF channels I copied Mirko's PEM BLRMS block, and made it a library part.  I don't know where such things should live, so I just left it      5842   Tue Nov 8 18:06:43 2011 Mirko Update Adaptive Filtering Noise injections to MC1-3 PIT & YAW With fancy analysis tools approaching usability I looked some more into noise projections from PIT,YAW motion of the MC mirrors to  7x    5848   Wed Nov 9 14:23:35 2011 Jenne Update Adaptive Filtering OAF MC Delay Measurement As described in elog 2063 and the mevans document, we need to measure the TF of      5856   Wed Nov 9 20:35:58 2011 Mirko Update Adaptive Filtering Seismic noise injection into the MC Very elaborated measurement ;-) On 11-11-08: 18:40 Stomp near STS1 for 2mins  8x    5858   Wed Nov 9 21:32:38 2011 Mirko Update Adaptive Filtering Put accelerometers 4-6 on top of MC2 tank Put the accelerometers on top of MC2. Orientated as the arms,GUR1 and STS1:      5864   Thu Nov 10 16:44:54 2011 Mirko Update Adaptive Filtering Looking into MC_F & PSL misalignment  [Den, Mirko] While doing the things below we accidentally misaligned the PSL laser. Thanks to Suresh      5867   Thu Nov 10 22:00:38 2011 Mirko Update Adaptive Filtering Looking into MC_F & PSL misalignment                            6x    5869   Fri Nov 11 00:55:53 2011 Den Update Adaptive Filtering MC_F [Mirko, Den] Not satisfactory work of adaptive filtering make us to think about the signals      5871   Fri Nov 11 10:30:27 2011 rana Update Adaptive Filtering MC_F    There should be a whitening filter in the Pentek Generic DAQ board (Eurocard      5879   Sat Nov 12 02:00:36 2011 Mirko Update Adaptive Filtering MC-F and other signals Regarding http://nodus.ligo.caltech.edu:8080/40m/5867 and http://nodus.ligo.caltech.edu:8080/40m/5869 :      5882   Sat Nov 12 02:46:13 2011 Den Update Adaptive Filtering stacks and ground We measured the coherence between the seismometer near the MC2 stack and accelerometers on the vacuum tank where MC2 is. Because accelerometers      5900   Tue Nov 15 22:31:39 2011 Mirko Update Adaptive Filtering Towards wiener filtering and improved OAFing [Jenne, Mirko] 1. We should help the OAF by compensating  7x    5919   Wed Nov 16 23:50:40 2011 Den Update Adaptive Filtering seismic noise injection [Micro, Den] Analyzing coherence of seismic noise and mode cleaner length we've figured out      5932   Thu Nov 17 22:24:19 2011 Den Update Adaptive Filtering MC1_COIL Analyzing coherence between MC length and signals on MC1, MC2 and MC3 coils we have noticed that MC1 COIL signal is not coherent      6065   Sat Dec 3 18:29:20 2011 Den Update Adaptive Filtering coherence I've looked through the coherence between the MC length and seismometers after the if-statement problem was fixed. Coherence      6068   Mon Dec 5 02:55:30 2011 Den Update Adaptive Filtering C1OAF I've added filter banks for correction path in the C1OAF model to use AA filters.  I compiled and installed the new version.      6070   Mon Dec 5 10:13:13 2011 Jenne Update Adaptive Filtering C1OAF                                6078   Wed Dec 7 00:11:58 2011 Den Update Adaptive Filtering OfflineAF  I did offline adaptive filtering with yesterday's 3 hours of MC-F and GUR1X data. It turns out that normalized-lms can      6093   Fri Dec 9 13:28:09 2011 Den Update Adaptive Filtering C1OAF I tried to figure out why red NO SYNC label became present in the C1OAF_GDS_TP screen after I added AA filters to the C1OAF model.      6094   Fri Dec 9 14:33:16 2011 Alex Ivanov Update Adaptive Filtering C1OAF                                6100   Fri Dec 9 17:53:31 2011 Den Update Adaptive Filtering C1OAF [Jenne, Den] AA filters for witness channels are added to the oaf model. It is working now      6110   Tue Dec 13 01:20:38 2011 Den Update Adaptive Filtering Modifications to LSC, RFM models, added OAF model                                6137   Mon Dec 19 17:17:02 2011 Den Update Adaptive Filtering filter tap dependence Online filter diverges. I did offline simulations with current c-code. Offline filter also diverges, even in the simplest case       6199   Sun Jan 15 10:28:02 2012 Den Update Adaptive Filtering delays We can account for delays in the oaf system by compensating it in the adaptive path of the filter. But using only this procedure

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