Sumamry of DQ Shift for the week of 12/16- 12/22.

• Overall a great week with ( 99.93 + 67.98 + 72.99 + 91.77 + 61.28 + 99. 90 +99.14)/7 = 84.71 %  analysis ready time, little over O3b average of 79.7 .
• Range was ~ 115 Mpc  most part  of the week and crept towards ~118 Mpc during the weekend.
• Increased 10-40 Hz glitches seen on Monday and Tuesday seem to be associated with associated with high microseism and turning off the CPS diff system seems to correct som eof the issue, especially in 20-40 Hz region. (53926)
• Apparent Excess Pcal noise in PcalX due to the low frequency calibartion measurments (53951)
• Loss of observing time because of squeezer OPO crystal degradation on Wednesday. (53965) 
• Excellent weekend with interferometer locked and crusing both Saturday and Sunday.