Gyro apparatus

PURPOSE:To make it possible to measure an accurate azimuth angle by providing a slant correcting means for a navigating body using the outputs of a roll angle and a pitch angle based on a satellite radiowave between the output side of an oscillating gyroscope and an adder. CONSTITUTION:The outputs of a roll angle and a pitch angle which are the output of a GPS-angle operating part 6 are connected to a slant correcting part 12. The outputted angular velocity error of an oscillating gyroscope 10 caused by the change in attitude angle of a navigating body is corrected. The result is inputted into an integrator 13 through an adder E. Meanwhile, the output of the azimuth angle which is computed in the operating part 6 is compared with the integrated value of the outputs of the gyroscope 10 in a comparator C. The remaining difference angle is negatively fed back to the adder E through a compensating and operating part 14. In this constitution of the system, the azimuth angle obtained by integrating the outputted angular velocity from the gyroscope 10 follows the azimuth angle from the operating part 6. Even if the output period of the operating part 6 becomes long, the period is interpolated with the azimuth angle with the gyroscope 10. Therefore, the continuous, accurate azimuth angle can be outputted all the time.