摘要
卫星钟差的可靠预报对于高精度的卫星精密单点定位至关重要。由于卫星钟差对环境比较敏感,可将其看作灰色系统来处理。采用灰色系统理论的方法,建立GM(1,1)模型,用于卫星的短期预报。数据来自IGS的精密星历文件,研究了4颗卫星的钟差预报情况。结果表明,灰色系统理论在钟差预报方面有很大优势,预报精度在纳秒级。
It＇s important for precise point positioning to predicting the satellite clock error.As the clock error is sensitive to the environment,we can consider it as grey model to dealing with.In the paper,we try to using the GM（1,1）model to forecasting the clock error.The date for building the model comes from IGS＇s SP3 file.In the test,we study four satellite clock errors.The results show that gray system has an advantage in predicting the clock error.The predicting accuracy is in ns scale.
出处
《全球定位系统》
CSCD
2016年第2期89-91,共3页
Gnss World of China
关键词
GM(1
1)
卫星钟差
短期预报
GM（1
1）
satellite clock error
short-term prediction
