S. Biscans, J. Kissel, N. Mazumder, H. Paris, H. Radkins, B. Shapiro, J. Warner

After an extremely productive two weeks -- thanks to the new years present of Narwita, Seb, Hugo, and Brett all arriving within the same few days -- I figure it would be good assess where the LHO SEI team's priorities lie from here on. In particular, what *other* things that we could be doing to improve *all* the platforms instead of continuing to bang our head  against the HAM3-0.6-[Hz]-feature wall. Here're the remaining activities, sort of prioritized, and split into "Improve the chamber noise performance" and "improve the maintainability / extensibility" groups.

Improve The Chamber Noise Performance:  
     All Chambers                                                 Benefit to IFO
     - ST 01 L4C Feed Forward (all 6 DOFs),             improve 1 to 10 [Hz] performance
     - Sensor correction gain matching (all 3 DOFs),    improve 0.08 to 3 [Hz] performance    

     BSCs Only
     - Z to RZ subtraction,                            reduce BSC optic's yaw below 0.08 [Hz]  
     - Implement Slow MICH,                        reduce MICH velocity, improving lock acquisition 
     - Finish ITM HEPI Z to RX/RY Tilt Decoupling,     reduce BSC optic's yaw below 0.08 [Hz]    

     HAMs Only
     - HAMs 2,3,4,5 Isolation Loop Gain Increase       improve 0.5 [Hz] to 20 [Hz] performance
     - Continue HAM3 0.6 [Hz] feature investigation        improve 0.6 [Hz] performance 

Improve the Maintainability / Extensibility:
     - BSC-ISI Noise Budget Model
     - HAM-ISI Noise Budget Model
     - HEPI Noise Budget Model
     - Assess guardian vs. watchdog robustness of bringing all chambers to OFFLINE from FULLY_ISOLATED
     - Put MATCH OUTPUT channels on Sensor Correction overview screen
     - Storing more than just RZ on HEPI alignment
     - Hook IOP SWWD signals up to ISI USER watchdog
     - Install HEPI saturable integrators
     - Remove HEPI / ST0 L4C Sensor Correction path from ISI models
     - Differential Pump Pressure signals are noisy possibly from poor electrical grounding
     - Switch ETMX to using differential pressure signal
     - Assess whether switching to differential pressure affects platform noise performance