The invention relates to a method and a surveying system for noncontact coordinate measurement on the object surface of an object to be surveyed in an object coordinate system. The token value is used to associate the first authentication parameter to the second authentication parameter, whereby the user is authenticated on the first channel. The first and second cells are essentially adjacent to each other in azimuth, and the system also comprises a third cell with an area coverage defined by a third azimuth and a third range. The shell forms a wafer and two such wafers are combined together to form a terminal assembly.