A bearing for a turbomachine variable pitch stator vane pivot mounted in a bore of the turbomachine casing is disclosed. It includes a signal-generation circuit to generate a sample signal for sampling the reflected voltage of the transformer. A region of the central conductor other than a central-conductor drawing portion thereof has outwardly projected portions in planar view of the central conductor. Upward facing antennas are placed on cell towers so as to establish a continuous coverage over the orbit of a satellite thereby allowing continuous communication using cellular technology with the satellite on orbit.