基于半参数最小二乘核估计的卫星精密钟差预报方法

研究半参数最小二乘核估计模型在精密钟差预报中的应用问题,提出一种基于时间自变量差值累加的窗宽参数计算模型,并通过实验验证该模型的有效性,讨论在不同预报时间长度和已知数据量的情况下模型预报精度。实验表明,与常规模型相比,半参数最小二乘核估计模型在预报精度与稳定性方面都取得较好的效果,可以满足精密单点定位对于精密钟差预报的精度要求。研究成果对于精密单点定位技术的推广普及具有一定的促进作用。

Forecasting method of satellite precision clock difference based on semi-parametric least square kernel estimating

T his paper studies the application of semi‐parametric least square kernel estimating model to the precision clock difference prediction ,puts forward a calculation model of the window width parameter based on independent variable differential accumulation ,of w hich the effectiveness of the proposed model is verified by experiment ,and discusses the prediction accuracy cases of the different forecast time length and the amount of data given .The experimental results show that compared with the conventional model , the least square kernel estimating model is good in accuracy prediction and stability ,w hich can meet the accuracy requirement of precise point positioning for the precision clock difference prediction .T he research for the precise point positioning technologies has a certain reference .