Abstract Currently, the Kalman filter is widely used to calculate satellite clock offset in real-time based on the un-differenced method. Square root filter can enhance the stability of numerical calculation, and avoiding filtering divergence, but the inversion computation time of matrix will take longer. The sequential algorithm can improve computational efficiency for avoiding direct matrix inversion. Taking the advantages of these two algorithms, a new square root filter method is proposed based on the sequential algorithm; it is then applied to satellite clock offset calculating in real-time. The result shows that the accuracy of satellite clock offset is better than 0.2 ns, and the calculation time is reduced by 40%.
DAI Taogao,LI Jianwen,ZHAO Jing et al. An Improved Method of Square Root Filter and Its Application in Real-Time Satellite Clock Offset Determination[J]. jgg, 2017, 37(9): 946-950.
DAI Taogao,LI Jianwen,ZHAO Jing et al. An Improved Method of Square Root Filter and Its Application in Real-Time Satellite Clock Offset Determination[J]. jgg, 2017, 37(9): 946-950.