1 The physical axis of a directional antenna 2 To align a directional antenna, using either an optical procedure or a fixed target at a known location
The direction of maximum antenna gain For a receiving antenna, the boresight is aligned with the satellite as accurately as possible for maximum received signal strength
The central axis of an antenna's main lobe, or the central axis about which the lobes of a multi-lobe radar are symmetrically positioned The process of establishing the actual electrical beam center with respect to a mechanical indicator (boresight error) The initial alignment of a directional antenna system using an optical procedure or a fixed known target such as the sun