The Global positioning system enables the aircraft to obtain real-time position and speed information in any area with a positioning accuracy of 10 meters. However, the accuracy of navigation will be greatly reduced when the aircraft is engaged in severe maneuvers or when the signal-to-noise ratio of the "navigation star" global positioning system is low. The combination of "Navistar" global positioning system and inertial navigation system can not only greatly improve the accuracy of the position and speed information of inertial navigation, but also estimate various interference amounts such as gyro drift and inertial platform attitude error, so as to improve the performance of inertial navigation system. At the same time, using the speed and other information provided by the inertial navigation system can also improve the ability of the Navigation Star global positioning system tracking loop to intercept and lock signals.

OEM-IMU70S  high precision inertial measurement unit built-in high precision three-axis integrated fiber optic gyro, high precision quartz flexible accelerometer, can measure the attitude parameters of the moving carrier (roll Angle, pitch Angle, angular velocity, acceleration), through nonlinear compensation, orthogonal compensation, temperature compensation and Kalman filter response evaluation, to ensure the force measurement accuracy is very high.