UKF-based INS/single-satellite Navigation Dynamic Positioning Algorithm

Today’s GNSS systems are capable of providing high-precision positioning services. However, GNSS positioning can be rapidly deployed in the absence of constellation navigation systems such as war. This paper proposes a single-satellite positioning method based on inertial navigation system (INS) and Doppler pseudorange difference. The INS component is used to solve the single-satellite positioning results under dynamic conditions. And the positioning results of the target are obtained after positioning iteration and fusion filtering, which can effectively improve the positioning accuracy of single-satellite navigation under dynamic environment. Comparing with Doppler single satellite positioning system based on least squares-Newton iteration and EKF under comprehensive error conditions, the positioning error of this algorithm is only 4% and 46% of the above two algorithms. The basic positioning service that can provide dynamic targets in special environment.