We just lost lock, it was probably preventable. There was work being done at ETMY, and looking at a few ISI and SUS signals it looks like someone got too close to the BRS, rung it up enough to push the ISI around and broke the lock. On the attached plot, you can see that for the first minute, the BRS_RX_IN, ISI_ST1_SCSUM channels are all quiet, then the BRS takes off, and this signal gets sent to the ISI through the sensor correction path, the SUS then saturates and breaks the lock. Probably could have prevented this by turning off the sensor correction at ETMY. Wind and microseism are both low enough that this probably wouldn't have broken the lock. The STS also saw some motion, so a state that doesn't use the ground sensor at all would have been appropriate, like WINDY_NOBRSY on the SEI_CONF guardian.