A new GM (1,1) model suitable for short‐term prediction of satellite clock bias

Due to the sensitivity of spaceborne atomic clock many factors, variation law satellite bias (SCB) can be regarded as a grey system. The GM (1,1) model is most classical and basic system, which has been successfully applied in SCB prediction. Moreover, improved models have proposed widely used various forecasts since was generated. However, prediction performance these not obviously compared with In view this, new come up this paper by optimising fitting initial condition. obtained differentiating time response function winterisation, condition generated through one or more components original sequence. authors employ GPS rapid precise provided International GNSS Service (IGS) for experiments. results show that effective feasible, its accuracy stability are enormously better than model, especially ultra-short-term