The two attached plots show the following signals over the span of 6h (patch them next to each other):

Blue:   FSS control signal readback
Green:  FSS autolocker state
Brown:  ISS diffraction efficiency
Cyan:   IMC build-up
Yellow: FSS temperature loop control signal

Notable:
 - The ISS diffraction efficiency varied between 10% and 15%. This corresponds to an ISS loop gain variation of sqrt(0.15/0.10)~1.2, or about 20%.
 - The short lock losses were due to Ethercat reboots, resulting in IMC lock losses. The FSS never dropped below state 2, as is evident from the fact the the temperature loop did not forget its offset.
 - The IMC held lock through the magnitude 7.0 earth quake in the Aleutians this morning. The peak seismic signal at LHO was on the order of 20u/sec.