👉 A goniostat is a device that measures the angle of an object or system in a specific direction. It works by measuring the deviation from vertical, which can be used to determine the orientation and position of the object. The goniometer uses two parallel lines perpendicular to the line of sight of the observer to align with the object's axis of rotation, then measures the difference between these two lines to provide an angle of rotation for the object. The term "goniostat" is