Saturations - High Priority:

• Worries: RF, ADC's, DAC's,  coils, software limits

 
• Straightforward to go after: [J.Zweizig - see data quality investigation page(Bittest)]

Look for IFO channels at or near full allowed range

Look for IFO channels at or near artificial software limits

• More difficult to go after:  [J. Zweizig - see data quality investigation page(Scan of reconstructed...)]
• Look for "hidden saturation" with no corresponding recorded DAQ channel. Use measured or modelled tranfer functions from recorded channels to infer clipping.
• Highest priority: AS_Q/DARM chain.
• Next: CM/MC, Mich, PRC,
• Next: Optical levers, WFS

• Look at and try to understand high-amplitude glitches in AS_Q

 
• Look at and try to understand burst/inspiral vetoes found empirically to be effective

 
• Use measured, calculated couplings from REFL_I, POB_I, POB_Q, AS_I to AS_Q to veto glitches in these channels

• Go through LHO and LLO detector and operator elogs to identify events not automatically caught by monitors or conlog [R. Adhikari, G. Gonzalez]

 
• Find all DAQ dropouts (1/16-second frame losses) [J.Zweizig - see data quality investigation page(Bittest)]

 
• Find and fix all 1-minute SenseMon inspiral range drops (thought to be due to monitor losing a frame)

 
• Find all malfunctions in the excitation channels used to track calibration stability [S2 Calibration Team (G. Gonzalez, M. Landry et al)]

 
• Identify periods of high noise upconversion from low frequencies to GW band [S2 Bilineary Couplings Team (V. Chickarmane, S. Penn)]

 
• Find periods when LSC processors fell behind 16 kHz sampling, leading to broadband noise
• Identify period(s) when end-station timing was unreliable [S. Marka]

Miscellaneous - Medium Priority:

• Identify start-of-lock settling period - dominated by violin ring-down? [S2 Violin Modes Team (S. Klimenko et al)]

 
• Identify end-of-lock degradation period [J.Zweizig - see data quality investigation page(DataQual), G. Gonzalez]

 
• Find isolated violin mode ringups (mid-lock) [S2 Violin Modes Team (S. Klimenko et al)]

 
• Look for events where chance alignment fluctuations led to high enough optical gain to make one or more loops temporarily unstable

 
• Look for periods of short lock segments indicating poor locking condtions and likely bad data when locked

 
• Look at correlations in AS_Q noise with microseismic & earthquake amplitudes

 
• Look for correlations in AS_Q noise with HAM4 accelerometers in ISCT4 (ISCT1) at LLO (LHO)

Original source materials for most of the above suggestions:

• Rana's list of worries
• Robert's list