Last night Corey ran a simulines measurement shortly into the start of the lock, 84908. This measurement was mainly done as a test to confirm simulines wasn't breaking the lock, so we were not well thermalized. We can first report that simulines did not break the lock, so the previous lockloss that occurred during the simulines measurement was likely unrelated to simulines itself.

GPS start of measurement: 1433563079

I did a time machine on the calibration monitor screen for the GPS start of the measurement.

I was able to generate a report by running pydarm report --skip-gds

I have attached the generated PDF from this report, and I took a screenshot of the first page since there is an interesting result. The sensing function shows a large spring, which is probably due to the fact that we are operating with a significant SRCL offset, which is designed to compensate for 1.4 degrees of SRCL detuning, 84794.

However, it is important to remember that this calibration measurement was made while the IFO was unthermalized, but the SRCL offset measurement I linked here was performed with the IFO thermalized.

The results from this calibration report are saved in /ligo/groups/cal/H1/reports/20250610T035741Z/