Abstract:Considering the problem that the performance of the existing improved GM(1,1) model is not significantly improved in satellite clock offset prediction, we present a method to improve prediction accuracy by optimizing the initial conditions. Firstly, we construct the GM(1,1) prediction model with unknown initial conditions, and then use the latest component of the original sequence to solve the initial conditions. Finally, we use the model to predict the precise clock offset data provided by IGS. The results show that the GM(1,1) model with optimized initial conditions is feasible for clock offset prediction, and the prediction accuracy is greatly improved compared with the traditional GM(1,1) model.
TAN Xiaorong,XU Jiangning,HE Hongyang et al. Optimized Initial Condition of GM(1,1) Model and Its Application in GNSS Clock Offset Prediction[J]. jgg, 2022, 42(9): 919-924.