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Virgo Runs (O3)
rolland - 10:36 Wednesday 04 March 2020 (48612) Print this report
Comment to Operator Report - Afternoon shift (48607)

Confirmation that EQ mode in compatible with Science mode (from the point of view of h(t) reconstruction).

The plot shows some monitoring channels during the EQ mode of yesterday afternoon, and at and after the transition EQ mode to normal mode at 17h50 UTC.

  • Compared to tests done in January and presented in VIR-0097A-20, the artifact of having h(t) = 0 at the transition when the EQ mode is stopped has been removed (thanks to permanent calibration lines added to NI and WI marionettes).
  • The monitoring of hrec bias at frequencies of different hardware injections are also shown (modulus and phase). They are stable in time, independent of the mode as it should be. It confirms that hrec is behaving normally while ITF is in EQ mode (thanks to subtracting the NI and WI marionette Z_CORR signals in Hrec).
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