Other sensors include an ambient light sensor, accelerometer, gyroscope, and compass. Sensors on the phone include accelerometer, ambient light sensor, gyroscope, and proximity sensor. The controller supports motion detection via a three-axis gyroscope and three-axis accelerometer and vibration. It features a variety of sensors, including an InvenSense 6-axis gyroscope, magnetometer, and accelerometer. Advanced technologies like ring laser gyroscope and accelerometer will be used in the new missile. Control was achieved using gyroscopes developed by Elmer Sperry of the Sperry Gyroscope Company. The TouchPad also features an InvenSense 3-axis gyroscope. The angle is measured by an angle sensor or electronic gyroscope. The result is that the spin vector undergoes precession, just like a classical gyroscope. Note as an example the precession of a gyroscope. A "gyrocompass" is similar to a gyroscope. Klepek called most of GamePad features well-implemented with the exception of the gyroscope controls. The rotating mass of the engine also made it, in effect, a large gyroscope. BigDog also features a laser gyroscope and a stereo vision system. Throughout the 1950s technicians experimented with a new device called the Electrically Suspended Gyroscope (ESG).