The first order Doppler effect for light propagated with a velocity c relative to the ether gives a wavelength  = cT(1 ?C v ??c/c2) for an observer moving with the velocity v where T is the period. A standing optical wave pattern established in a closed ring then experiences an additional phase shift when the light path parallel experiences an additional phase shift when the light path parallel to v is decreased by - ?? and antiparallel by + ??. This additional phase shift, when n relative to a monitoring signal not sensitive to v, gives the velocity of the observer relative to the ether as v = c/2??. The velocity of the solar system relative to the ether is found to be 378 ?? 8 km/sec in the direction of right ascension a = 11 ?? 2?? in reasonabe agreement with the 2.7K background anisotropy and Marinov??s coupled mirrors experiment and his toothed wheels experiment.