SHORT-TERM PREDICTION OF SATELLITE CLOCK BIAS BASED
ON TWO-STEPS MINIMIZATION
1)School of Environment Science and Spatial Informatics,China University of Mining and Technology,
Xuzhou 221008
2)Key Laboratory of Resources and Environmental Information Engineering of Jiangsu Province,
Xuzhou 221008
3)Land Resources Bureauof Tongshan District Xuzhou City,Xuzhou 221008
4)Air Force Service Acadeny,Xuzhou 221008
Abstract:A model to estimate shortterm prediction of satellite clock bias was established based on quadratic polynomial and twosteps minimization.The coefficient of covariance function was fitted with residuals of quadratic polynomial model.Comparison between result with the model and usual method indicates that the accuracy of the collocation model in shorttime prediction of satellite clock bias improved.It can be also served as a new interpolation method by comparing with common algorithms of clock bias prediction and interpolation.