Abstract:Based on the near space hypersonic targets, Iterated Reduced Square-Root Cubature Klaman Filter(IRSRCKF) is proposed. The algorithm takes SRCKF as the basic theory framework. Firstly, when the state equation of system is linear, the algorithm substitutes the SRCKF algorithm that needs to calculate cubature point. That simplifies the time update step and improves the real time performance. Then, combining iteration operation, the measurement is fully used by this algorithm to improve the tracking accuracy. Finally, simulation results show the accuracy and effectiveness of the algorithm. The algorithm is applied to track the near space hypersonic targets as a novel method.