Principle of the experiment.

It has been proved that even with the absolute space-time theory GTWMC, nature manages to hide the anisotropy of the light speed (or ether-wind) if we try to detect it with free electromagnetic wave.

There is no hope with the round-trip speed of light which is fully isotropic, and if we try to detect the anisotropy of the one-way speed of light with atomic clocks, we see that the theory leads to the fact that the anisotropy will be exactly cancelled by the change of the phases of the clocks when they are reversed for the purpose of the experiment.

Fortunately, a solution has been finally found to trap nature which was preventing us to detect the ether-wind since the MIchelson-Morley experiment.

The solution is to chose a line on Earth, like a coaxial cable, which propagates the electromagnetic field with a lower velocity than c in the ether rest frame.

In this case, along the X axis of the rest frame, the equation of the phase motion in the positive way is: x = w.t with w < c.

Thus, according to GTWMC, the velocity in K' (moving frame) is :[w-v]/(1-bb).

When the phase motion is in the negative way, the velocity in K' is: -[w+v]/(1-bb).

And we obtain an encouraging result:

Between two points apart of D' in K' along the X' axis, the time phase shift expected for a 180° rotation is: D'(1-bb)[1/[w-v] - 1/[w+v] ] about 2.v.D'/sq(w).

This time, the anisotropy of the speed of light is not cancelled by the change of the phases of the clocks: 2.v.D'/sq(c), and the time-phasedifference is observed experimentally: [2.v.D'][1/sq(c) -1/sq(w)].

But obviously as the coaxial cable is not straight at all, and because it is not in the plane of the ether-wind vector (like theoretically assumed), the formula above doesn't permit to obtain a reliable value of the ether-wind velocity, but only an order.

As the distance between Paille and Marais street in Brussel is in the order of 1.5 km, with a cable of velocity w=200,000 km/s, the phase shift observed around 24 ns peak-to-peak, leads to the conclusion that the ether-wind velocity is in the order of 500 km/s. In good agreement with the order of the velocity relative to the microwave background (which for me is the local and present ether noise).

But incredibly, the use of refringent material with velocity w < c doesn't permit to obtain a clear positive result but only a weak phase signal well-explained by the present theory. See the experiment of Krisher et al.

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