J. Kissel, H. Radkins, J. Warner, A. Pele

Here's a recap of the the week's progress, contrasted against last week's to-do list; revising it for the next week or two. Arnaud's back to LLO tomorrow, Krishna's in for next week.

Improve The Chamber Noise Performance:  
     All Chambers                                                 Benefit to IFO
     - ST 01 L4C Feed Forward (all 6 DOFs),             improve 1 to 10 [Hz] performance -- No progress yet
DONE - Sensor correction gain matching (all 3 DOFs),    improve 0.08 to 3 [Hz] performance (see LHO aLOG 16208)
         - Turned into "Investigate factor-of-2 problem with Corner Station STS B's X Channel" (see LHO aLOG 16237)
     - Assess whether switching to differential pressure affects platform noise performance -- suddenly interesting, may impact sub-0.1 [Hz] Yaw (see LHO aLOG 16231)
         - Measure HEPI Pump Servo Plant
         - Tune Pump Servo PID loop
         - Differential Pump Pressure signals are noisy possibly from poor electrical grounding, fix it if still there after loop tuning

     BSCs Only
     - Z to RZ subtraction,                            reduce BSC optic's yaw below 0.08 [Hz]  
            This has turned into "Close RZ loops on Stage 1 and Stage 2 with high frequency blend filters" but seems to have little to no improvement. Continue Assessment.
     - Discuss / Assess closing the rest of ST2 isolation loops
     - Assess performance of loops with GS13s in low gain vs. high gain (are we ADC noise limited?)
     - Implement Slow MICH,                        reduce MICH velocity, improving lock acquisition -- No progress; waiting for Ryan DeRosa
DONE - Finish ITM HEPI Z to RX/RY Tilt Decoupling,     reduce BSC optic's yaw below 0.08 [Hz] (see LHO aLOG 16118)

     HAMs Only
DONE - HAMs 2,3,4,5 Isolation Loop Gain Increase       improve 0.5 [Hz] to 20 [Hz] performance (see LHO aLOG 16214)
     - Continue HAM3 0.6 [Hz] feature investigation        improve 0.6 [Hz] performance
            No progress on *solving* the problem, but some investigation on finding a better compromise (see LHO aLOG 16196

Improve the Maintainability / Extensibility:
     - BSC-ISI Noise Budget Model -- Good Progress; see G1500081
     - HAM-ISI Noise Budget Model -- No progress yet; sort of waiting for BSC-ISI budget to be more developed
     - HEPI Noise Budget Model -- No progress yet
     - Assess guardian vs. watchdog robustness of bringing all chambers to OFFLINE from FULLY_ISOLATED -- No progress
     - Put MATCH OUTPUT channels on Sensor Correction overview screen -- No progress
DONE - Storing more than just RZ on HEPI alignment (see LHO aLOG 16207, LHO aLOG 16191)
     - Switch ETMX to using differential pressure signal
     - Include closing ST1 and ST2 RZ loops into guardian
     - Include gain switching on all Guardians
     - Get ISI system under SDF system configuration control
DONE - Get HPI system under SDF system configuration control (see LHO aLOG 16217)
DONE - Install DeRosa filters into NXT blend filter banks, such that blend switching may eventually work (see LHO aLOG 16200)
     - Figure out how to make blend switching code work with multi-bank filters

Relegated to installation AFTER 2 hour lock:
     - Hook IOP SWWD signals up to ISI USER watchdog
     - Install HEPI saturable integrators
     - Remove HEPI / ST0 L4C Sensor Correction path from ISI models