The detected anomalous frequency drift acceleration in Pioneers radar data finds its explanation in a Berry phase that obtains the quantum state of a photon that propagates within an expanding space-time. The clock acceleration is just the adiabatic expansion rate and an analogy between the effect and Foucaults experiment is fully suggested. In this sense, light rays play a similar role in the expanding space than Foucaults Pendulum does while determining Earths rotation. On the other hand, one could speculate about a suitable future experiment at laboratory scales able to measure the local cosmological expansion rate using the procedure outlined in this paper.
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