Virgo Logbook

Environmental Monitoring (Environmental Monitoring)

Boschi, 46th Airbrigade, Fiori, Mantovani, Menzione, Paoletti, Pillant, Tringali - 15:02 Monday 07 January 2019 (44268)

C130J Flyover Tests

A series of tests has been performed this afternoon using a Lockheed Martin C130J plane of the 46th Air brigade. A flyover and a circle of 1000 feet of radius have been done over the experimental buildings at different altitudes. The following table summarizes the flyover times (passage on the vertical of the building) at different altitudes with the interferometer in LN3.

Building	2000 ft	1500 ft	1000 ft
CB	12:36:30 UTC	12:32:15 UTC	12:28:40 UTC
NE	12:37:49 UTC	12:33:16 UTC	12:29:45 UTC
WE	12:38:20 UTC	12:34:10 UTC	12:30:38 UTC

Comments to this report:

paoletti - 16:28 Monday 07 January 2019 (44272)

C130 seems less impacting on DARM, see attached.

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Boschi - 17:53 Monday 07 January 2019 (44275)

The effects of the C130 seem indeed limited on DARM. The spectrograms of the microphones and of the DARM signal during the three flights on the CB, NE and WE buildings at 1000 feet are reported

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fiori - 15:00 Wednesday 23 January 2019 (44493)

some plots showing the microphone and DARM noise for 1minute around the times reported in the table for the helicopter flights over CEB:

figure 1 - spectrograms, helicopter above CEB at altitude 2000ft
figure 2 - spectra, helicopter above CEB at altitude 2000ft (compare qui quiet time)
figure 3 - spectrograms, helicopter above CEB at altitude 1500ft (compare qui quiet time)
figure 4 - spectra, helicopter above CEB at altitude 1500ft (compare qui quiet time)
figure 5 - spectrograms, helicopter above CEB at altitude 1000ft (compare qui quiet time)
figure 6 - spectra, helicopter above CEB at altitude 1000ft (compare qui quiet time)

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