In combination with algorithms such as electronic map and path planning, GNSS can accurately locate and orient robots and automatically travel according to the path planning. If fitted with a single antenna, GNSS can accurately provide the position and movement direction of a robot while moving. If fitted with dual antennas, GNSS can accurately provide the position and orientation of a robot even when standing still. UM4B0 and UM482 (and other small positioning modules), which are introduced by Unicore Communications, support the application scenarios of single antenna and dual antenna, respectively, and have been successfully applied to various outdoor robot products such as inspection, marking, agricultural spraying and mowing robots. They are preferred for outdoor robot positioning.