The BRS-Y has been continuing it's (already known) drift toward the end of its light sensor. So, some time we should probably turn the sensor correction off on Friday. I have added a state to do this in the SEI_CONF guardian, called WINDY_NO_BRSY. Krishna and Michael are already planning on coming over to address this on Tuesday.
There is a test for both BRSes in the Diag guardian node, so we should either wait for the notification for BRSY to come up or make the change last thing Friday night. If commissioners or operators don't want to risk an ISI trip, there is no problem with making the switch right now.
It should be noted that since both BRSes have been installed, this drift has been the only issue effecting the robustness of the BRS. Otherwise, we have been runing them as part of our nominal configuration for a couple months now.
I looked at the BRSY closer and it's getting close enough that a diurnal swing could take the spot position out of range. I've switched the SEI_CONF state, it should be left in the WINDY_NO_BRSY state unless the microseism comes up ~about an order of magnitude over the weekend.