Tonight we closed the loop on-sky, on Kate and T.J.’s first night here this run.
We were able to use the new pupils we calibrated over the last few days, and Marco’s new interaction matrix, to close the AO loop with 378 modes. This was a big step forward! The wavefront error was close to 100 nm rms in 0.5-0.7″ seeing. This is our best correction yet!