From sballmer@ligo.mit.edu Thu Oct 13 15:08:45 2005
Date: Thu, 13 Oct 2005 15:07:01 -0400
From: Stefan Ballmer <sballmer@ligo.mit.edu>
To: stochastic <stochastic@ligo.caltech.edu>
Subject: [Stochastic] 1Hz harmonics
Folks,
Here is a list of elog entries related to the 1Hz harmonics stuff.
1/4Hz, 1/8Hz lines:
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=09/20/2005&anchor_to_scroll_to=2005:09:20:23:12:10-landry_m
H1:LSC-DARM_ERR averaged over the whole S4: 2 distinct edges visible;
L1 signature consistent with GPS_RAMP x-talk
Not much visible in H2
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=10/03/2005&anchor_to_scroll_to=2005:10:03:21:54:20-stefan
Claim: 1Hz harmonics are not in H1:LSC-AS_Q: Result: Myth busted
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=10/04/2005&anchor_to_scroll_to=2005:10:04:17:45:18-stefan
Removing 1PPS input to LSC reduces 1Hz noise and subharmonics
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=10/05/2005&anchor_to_scroll_to=2005:10:05:12:17:38-landry_m
Spectrum of timing transient
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=10/07/2005&anchor_to_scroll_to=2005:10:07:07:23:49-stefan
1PPS GPS ramp removed for duration of M7
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&date_to_view=10/07/2005&anchor_to_scroll_to=2005:10:07:14:49:38-landry_m
No timing-glitch visible in M7 / However, 1Hz and harmonics remain
visible
http://blue.ligo-wa.caltech.edu/ilog/pub/ilog.cgi?group=detector&task=view&date_to_view=10/11/2005&anchor_to_scroll_to=2005:10:11:15:34:41-stefan
Correlation from 1Hz harmonics
http://ldas-sw.ligo.caltech.edu/ilog/pub/ilog.cgi?group=stochastic&date_to_view=10/03/2005&anchor_to_scroll_to=2005:10:03:21:06:46-ballmer
Mitigating the South Pole Anomaly by timing transient subtraction in
time domain
http://ldas-sw.ligo.caltech.edu/ilog/pub/ilog.cgi?group=stochastic&date_to_view=10/12/2005&anchor_to_scroll_to=2005:10:12:19:15:42-ballmer
H1L1 DARMERR Coherence with 0.001 Hz Resolution
http://ldas-sw.ligo.caltech.edu/ilog/pub/ilog.cgi?group=stochastic&date_to_view=10/12/2005&anchor_to_scroll_to=2005:10:12:17:10:44-vmandic
S4 H1L1 Analysis with Higher Resolution
http://ldas-sw.ligo.caltech.edu/ilog/pub/ilog.cgi?group=stochastic&date_to_view=10/13/2005&anchor_to_scroll_to=2005:10:13:00:36:01-vmandic
Stefan
--
Stefan Ballmer phone: (617)
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Massachusetts Institute of Technology
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