I've seen and noted this before.  It has been present since early Feb when the sensors were quieted and the noise dropped enough.

If you look at trends, there is a brief upward spike on all the pressure sensor channels at the EndY HEPI Pump System that occurs everyday at 0329utc +- seconds!.  Additionally, there is a weekly (Sunday) double glitch.  The first glitch of the Sunday double occurs at the same time as the daily and looks similar and a second (slightly different) hits 20minutes later followed by a downward glitch 10 minutes later.  Yes, every day and every Sunday.

The pressure does cause the pressure servo to react--see the CONTROL_VOUT.  The glitch is actually a 40 second climb of the pressure which the servo attempts to counter with a reduction of the drive output.  If the servo was driving the pressure, the sign would be reversed.

The glitches don't show in the position controllers or the inertial out of loop hepi sensors.  The Actuator performance must not be that sensitive to the absolute or differential pressure.  So, this really is not an IFO issue but we should figure out what is causing this.  This is not seen in the other Pump Station's pressures but they may be currently too noisy.

Attached are 2 hour second trends of the daily and weekly glitches.  Posting this here for the record and will open an integration issue.

Anyone else see anything at this time?