MODS  Controller Upgrade – Instrument Availability Delayed
update: Dec 29th

The MODS instruments underwent controller upgrades this summer, replacing the legacy head electronics and a set of aging computers. These upgrades were carried out to ensure the long-term reliability, robustness, and stability of the instruments. Additionally, preliminary testing shows a significant reduction in readout overheads.

Both MODS are mounted on the telescope. A closed-dome check of the IMCS (image motion control system) indicates that the quad cell and feedback loop are working well, and initial AGW checkout tasks were performed on-sky on Dec 23rd UT. Closed-dome work using the science detectors is ongoing. The next opportunity for on-sky checkout is Jan 1 and 2 UT (unfortunately, a winter storm is forecast for those dates) and further updates will follow after that.