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Reports until 13:53, Thursday 12 September 2019
H1 SEI
jim.warner@LIGO.ORG - posted 13:53, Thursday 12 September 2019 (51922)
BLRMS bars added to BRS overview

I've added some graphical displays for the BLRMS for the BRS to the BRS overviews, they are the four bars in the lower right of the attached screenshot. They are labeled by bin, but for clarity from left to right they are: .03-.1hz, .1-.3hz, .3-1hz and 1-3hz bands. When BRSX was buggy, these were useful channels for finding the problem, so I wanted to make them easy to find and see the status of. 

The bars all go from 0-20 nrad/s rms velocity (I think that's right). Coincidentally, for the .03-.1 hz band 20 nrad/s is about the tilt we see with around 40mph winds and this is about the scale of the .3-1hz and 1-3hz noise we had when BRSX had guests. So, when the left-most bar is all (or nearly) blue (I haven't figured out how to get the bar to change color, to say, red), locking will be difficult and when the right two bars are full it likely means the BRS is noisy. When they are all mostly dark grey, things are quiet.

The first attached screenshot is a time machined view to when peak winds were about 40mph, you can see the low frequency bins have a lot going on, the higher not so much. The second image is from an hour or two earlier today when winds were pretty low, not much to see.

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