Yes, it is broken. Worse, I do not know how to fix it.
Specifically it is the primary fringe tracking camera, FATCAT, that has unacceptable levels of noise. We are due to be observing with it tomorrow night. No fringe tracker, no interferometer. After several days of troubleshooting I still have no idea what is wrong. I do know about a lot of things that are working, having painstakingly checked many parts of the system. The level of frustration is building.
Back to the summit tomorrow. Which sucks. I was supposed to be helping out with the Planet Walk tomorrow. Setting up a solar telescope to allow kids to see our star. Instead, it is back to the frustration of a broken camera.