摘要
讨论两种原子钟时间预报模型:普通多项式模型和切比雪夫多项式模型。利用IGS提供的精密钟差数据,分别对3种不同时期发射的GPS卫星的卫星钟预报1天的卫星钟差,并对其钟差预报效果进行分析和比较,结果表明,利用切比雪夫多项式模型进行时间预报,其与普通多项式模型的预报效果相差很小,因此可以用切比雪夫多项式模型来替代普通多项式模型进行卫星钟差的预报。
Two basic models, general polynomial model and Tchebytchev polynomials model which are used to predict the time deviation of atomic clock, are discussed. One day＇ s clock bias of three different GPS satellite＇ s clocks, which are launched in different period, are predicted by using of the precise clock bias data supplied by IGS, and the prediction results of clock bias are analyzed and compared, and the results show that when using the Interpolation model with Tehebytchev polynomials to predict the time deviation of atomic clock, the prediction results＇ differences are very small compared with the results of general polynomial model. Therefore, the general polynomial model can be instead of by interpolation model with Tchebytchev polynomials to predict the time deviation of atomic clock.
出处
《大地测量与地球动力学》
CSCD
北大核心
2010年第1期77-82,87,共7页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40774031)
全国优秀博士论文专项基金(200344)
卫星导航与定位教育部重点实验室(B类)开放基金(GRC-2009010)
中国科学院动力大地测量学重点实验室开放基金(L06-06)
解放军信息工程大学博士生创新基金
军事测绘任务"中国及周边重力场精化"项目
关键词
普通多项式模型
切比雪夫多项式模型
时间预报
导航卫星
卫星钟差
general polynomial model
Tchebytchev polynomials model
time prediction
navigation satellite
satellite＇ s clock bias
