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Reports until 03:19, Thursday 09 May 2019
H1 DetChar (DetChar)
corey.gray@LIGO.ORG - posted 03:19, Thursday 09 May 2019 - last comment - 03:58, Thursday 09 May 2019(49141)
Summary Pages Updating At A Time 7hrs Behind H1 (&L1)

[Noticed this a few days ago and wasn't sure if this was always the case or not, but I'm pretty sure this is a new feature.]

In the LHO Control Room, on one of our wall monitors we have the BNS Range via a DMT viewer showing the last 24hrs.  Underneath it we have "H1 h(t) triggers, last hour (DMT Omega)"....and previously instead of DMT Omega, it was Omicron.  This "live" updating plot comes from the H1 Summary Page(attached is a screenshot of the entire Summary Page, BNS range, and also the H1 ISC_LOCK(12hrs) plot to compare to the BNS Range)

I remember it was nice to have this "last hour" tool up so we can take a look at how things were looking in real time for the last hour.  Tonight when I glanced up at it, I saw what looked like something strongly sweeping in frequency (attached is a screenshot of the DMT Omega screen w/ a sweeping feature, as well as screenshot showing both plots as they look on our wall in the Control Room).  Thought that was odd, so investigated.  Looks like the Summary Pages (where we get the DMT Omega trigger plot from) are posting  updates to a time 7hrs back in time.  So, the swept sine feature I saw was not something that happened in the last hour, it was something which happened 7-8hrs ago, and it is updating from 7hrs earlier in the day.  This makes more sense, because at that time there was commissioning/calibration work going on 7hrs ago.  Is this how the Summary Pages were intended to run?

I do remember these plots would update within a couple minutes of the current time (instead of 7hrs earlier) & this was something useful to glance at when sitting in the Control Room.  I think I noticed this a few days ago when I wanted to check on how H1 was doing from home by looking at the "H1 ISC_LOCK guardian, last 12hrs" plot (which is on the Summary Page which also has the DMT Omega trigger page mentioned above), and noticed that the most recent 7hrs were missing.

(Looking at the L1 Summary Page, I'm seeing the same 7-hr-in-the-past feature for them as well.)

Images attached to this report
Comments related to this report
duncan.macleod@LIGO.ORG - 03:48, Thursday 09 May 2019 (49142)

Thanks for the report, this error has now been corrected, and all plots should be up-to-date. Time-zones are tricksy.

corey.gray@LIGO.ORG - 03:58, Thursday 09 May 2019 (49143)

Ha!  Thank YOU!  And now we are live in the Control Room!  That was quick!  Yeah, the 7hrs seemed to be too coincidental to our time difference to UTC, so I was wondering.  Thanks once again!

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