摘要
利用二次多项式和GM(1,1)灰色系统两种模型对GPS卫星钟差进行了预报分析。计算结果表明:在短期(1d)预报中,两者的预报误差在1ns量级以内;在长期(210d)预报中,灰色模型预报精度明显高于二次多项式模型预报精度,并且灰色模型长期(210d)预报Cs钟的精度高于Rb钟。
Quadratic polynomial model and gray system model are used in predicting GPS clock error. Calculating resuits show that the short term ( 1 day) predicting precision of the two models is high, and the level of maximum error is lower than lns. In the secular term (210 days) predicting GPS clock error precision of gray system model exceeds quadratic polynomial model obviously, and GPS Cs clock error precision of gray system model is better than GPS Rb clock.
出处
《飞行器测控学报》
2007年第3期39-43,共5页
Journal of Spacecraft TT&C Technology
关键词
二次多项式
灰色模型
卫星钟差
预报
Quadratic Polynomial
Gray System Model
Satellite Clock Error
Prediction