A rear view mirror with retroreflective function is disclosed. A link row is a series of links representing a series of roads in a road system, and as link row data, link data for the links that constitute the link row are arranged in the order in which the links are connected. The compressed air regulator is set at a reference pressure, which corresponds to the unregulated static pressure prevailing when all spinning positions are in operation. The ETPA also is configured to estimate and adaptively maintain the envelope and RF signal time alignment during operation of the ET PA.