This has been the plan for a while, to add Picket Fence to the SEI_ENV earthquake transition. I more or less copied the logic for the PEAKMON tests that we use for the earthquake transitions and appliedt that to the network peak channel for picket fence. So if the network peak channel goes above 800nm/s that will cause SEI_ENV to transition to the appropriate earthquake state. I have convinced myself that the worst case scenario is we just won't transition early because of network lag in picket fence. I haven't seen any cases so far where a signal in picket fence would cause us to unnecessarily transition. I have seen many cases where picket fence gave ~30sec of early warning. The code is pretty simple and only got added to two or three state test in SEI_ENV, so if it breaks something it will be easy to remove.
There was a smaller earthquake over the weekend where SEI_ENV successfully transitioned based on the picket fence. Looks like there was a seismon alert, then picket fence and peakmon started seeing motion. Picket fence hit transition threshold first, SEI_ENV transition to earthquake mode. Worked more or less as hoped.
Attached trends show that picket fence triggered a transition about 40 seconds before peakmon would have, denoted by the gap between to T1 and T2 markers. IFO stayed locked, range didn't seem to be effected by this.
Guardian log details:
2024-03-17_01:02:20.270775Z SEI_ENV [CALM.run] Seismon active
2024-03-17_01:02:20.323350Z SEI_ENV JUMP target: SEISMON_ALERT
2024-03-17_01:02:20.323922Z SEI_ENV [CALM.exit]
2024-03-17_01:02:20.384479Z SEI_ENV JUMP: CALM->SEISMON_ALERT
2024-03-17_01:02:20.384479Z SEI_ENV calculating path: SEISMON_ALERT->AUTOMATIC
2024-03-17_01:02:20.386365Z SEI_ENV no path from SEISMON_ALERT->AUTOMATIC
2024-03-17_01:02:20.387211Z SEI_ENV executing state: SEISMON_ALERT (20)
2024-03-17_01:02:20.392798Z SEI_ENV [SEISMON_ALERT.enter]
2024-03-17_01:02:20.396653Z SEI_ENV [SEISMON_ALERT.main] timer['wait_for_eq'] done
2024-03-17_01:02:20.396879Z SEI_ENV [SEISMON_ALERT.main] timer['wait_for_eq'] = 0
2024-03-17_01:12:09.400662Z SEI_ENV [SEISMON_ALERT.run] Seismon expired, waiting for 10min.
2024-03-17_01:12:09.401201Z SEI_ENV [SEISMON_ALERT.run] timer['wait_for_eq'] = 600
2024-03-17_01:14:30.963091Z SEI_ENV [SEISMON_ALERT.run] Picket fence active, moving to earthquake state
2024-03-17_01:14:31.022819Z SEI_ENV JUMP target: EARTHQUAKE
2024-03-17_01:14:31.022819Z SEI_ENV [SEISMON_ALERT.exit]
2024-03-17_01:14:31.073148Z SEI_ENV JUMP: SEISMON_ALERT->EARTHQUAKE
2024-03-17_01:14:31.075567Z SEI_ENV calculating path: EARTHQUAKE->AUTOMATIC
2024-03-17_01:14:31.076049Z SEI_ENV no path from EARTHQUAKE->AUTOMATIC
2024-03-17_01:14:31.077111Z SEI_ENV executing state: EARTHQUAKE (30)
2024-03-17_01:14:31.080344Z SEI_ENV [EARTHQUAKE.enter]
2024-03-17_01:14:31.085106Z SEI_ENV [EARTHQUAKE.main] ezca: H1:GRD-SEI_CONF_REQUEST => EARTH_QUAKE
2024-03-17_01:14:31.086931Z SEI_ENV [EARTHQUAKE.main] timer['calm'] done
2024-03-17_01:14:31.087026Z SEI_ENV [EARTHQUAKE.main] timer['calm'] = 0
2024-03-17_01:14:31.149187Z SEI_ENV [EARTHQUAKE.run] timer['calm'] = 600
2024-03-17_01:24:31.149524Z SEI_ENV [EARTHQUAKE.run] timer['calm'] done
2024-03-17_01:24:31.209025Z SEI_ENV [EARTHQUAKE.run] Low ground for 10min, going back to CALM
2024-03-17_01:24:31.264932Z SEI_ENV JUMP target: CALM
2024-03-17_01:24:31.267722Z SEI_ENV [EARTHQUAKE.exit]
2024-03-17_01:24:31.329422Z SEI_ENV JUMP: EARTHQUAKE->CALM
2024-03-17_01:24:31.329664Z SEI_ENV calculating path: CALM->AUTOMATIC
2024-03-17_01:24:31.329812Z SEI_ENV no path from CALM->AUTOMATIC
2024-03-17_01:24:31.331824Z SEI_ENV executing state: CALM (10)
2024-03-17_01:24:31.332473Z SEI_ENV [CALM.enter]