Long-endurance anti-jamming posture heading calibration method of inertial satellite navigation integrated navigation system

The invention relates to a long-endurance anti-jamming posture heading calibration method of an inertial satellite navigation integrated navigation system. The long-endurance anti-jamming posture heading calibration method is characterized in that in an inertial navigation system, inertial navigation resolving is performed to output posture heading, speed and position information; updating is performed; the position information of the satellite positioning navigation system is used as reference information; data fusion is performed with the position information of the inertial navigation system; according to fusion strategies, a mathematical model is determined according to the error spreading rule of the inertial navigation system; a kalman filter is used for performing online estimationand calibration on the error state of the navigation information of the inertial navigation system. The design is reasonable; the kalman filter is used for performing combined filtering on the navigation information of the in