I dont think that LIGO has been calibrated.

I think u would need a big dumbbell, rotating at various rates.

Dumbbell would be located at various angles & at various distances.

Dumbbell would be rotated in various planes, angles.

Could praps use two 1 tonne wts at 10 m spacing. In a safety vacuum chamber. Very well balanced, no vibrations.

The produced QGW would be a Newtonian one, ie the wave strength would be based on Newton's equation for the change in attraction from the 2 masses as felt at a certain distant point.

The distance would be a worry, ie if the dumbbell were 4 km from the end of a 4 km LIGO arm it would then be 8 km from the other end. But a mathematician would soon work it all out.

The speed of the QGW would be interesting. Einsteinologists believe in two speeds, IAAAD & c.

I dont think that Einsteinologists believe in a speed of c/n, ie if in air.

Has there ever been any discussion of any such calibration?

I wonder what the math says. What would be an equivalent distance to the dumbbell, ie to give a QGW strength equivalent to what was supposedly felt by the three recent detections. Would it be 1m or 1 km or 100 km or ??km.

U could do such a test at one of the LIGO experimental mini-ligo's, ie to see if a QGW actually gives some kind of effect. And the speed. I say there would be an effect. I say the speed would be over 20 billion c.