1. A system for accurate target orientation measurement, comprising: a target capable of pitch and yaw movements; a measurement retro-reflector disposed within the target for transmitting a portion of a received laser beam; an aperture disposed in the measurement retro-reflector that defines a transmitted laser beam; a detector that registers a laser beam image of the transmitted laser beam; and a processing unit that receives position information of the laser beam image and determines pitch and yaw movement of the target, wherein the aperture size is smaller than a critical size above which a background light image interferes with the laser beam image, the background light image formed from background light.