捷联式惯性导航，四元素解析姿态。用基本的C程序完成。可移植性高。惯性导航系统。但是里程计还没做好。 值得学习-Strapdown inertial navigation, four element analytic posture.With the basic C program to complete.High portability.Inertial navigation system.But the odometer is not ready. Worth learning