20120259579 | METHOD AND APPARATUS FOR DETERMINING ORIENTATION USING A PLURALITY OF ANGULAR RATE SENSORS AND ACCELEROMETERS - A method and apparatus for determining the orientation of an object relative to a coordinate system. The apparatus includes a body providing a reference for a local coordinate system. A rotatable sensor array is provided having more than one sensor and a rotational axis about which the rotatable sensor array rotates. A rotational drive system is provided for rotating the rotatable sensor array both to precise positions relative to the local coordinate system and at a precise rate relative to the local coordinate system. An angular position indicator to measure the angular position of the rotatable sensor array. | 10-11-2012 |