基于国产氢原子钟的钟差预报方法研究

RESEARCH ON METHODS FOR PREDICTING CLOCK ERROR BASED ON DOMECTIC HYDROGEN ATOMIC CLOCK

用灰色模型、二阶多项式模型和一阶多项式模型3种方法对中国科学院上海天文台研制的氢原子钟差时间序列进行了预报分析,结果表明:灰色模型与一阶多项式模型的3天预报精度基本相当,均高于常用的二阶多项式模型的预报精度;当取样时间短时,灰色模型与一阶多项式模型的预报精度明显高于二阶多项式模型预报精度。

Grey system model, quadratic polynomial model and simple polynomial model are used for predicting hydrogen .atomic clock error made in Shanghai observatory. The calculating results show that the accuracy of predicting clock error of grey system model and simple polynomial model is equal, which exceeds that by quadratic polynomial model. When the time for data sampling is short, the accuracies of predicting clock error by use of grey system model and simple polynomial model exceed quadratic polynomial model obviously.