摘要
在回顾了二次多项式模型用于卫星钟差长期预报特点的基础之上,考虑到钟差中随机项部分的影响,以天为尺度,利用拟合推估法建立钟差预报模型,并根据拟合推估模型的两步极小解法解算该模型,依据模型残差拟合协方差函数系数。所得结果与常用的钟差预报算法结果进行比对,验证了该模型在卫星钟差长期预报方面的有效性。
After reviewing the quadratic polynomial model used to predict long-term satellite clock error,a collocation method to estimate satellite clock bias is established by considering the random part of satellite clock bias based on the scale of day.The coefficients of covariance function of the collocation are fitted by data residuals.Finally,based on the two steps＇ minimization,the model is confirmed to have a good performance in the short term prediction of clock bias and can be also served as a new interpolation method by comparing with common algorithms of clock bias prediction.
出处
《工程勘察》
2014年第9期73-76,共4页
Geotechnical Investigation & Surveying
基金
江苏高校优势学科建设工程资助项目(PAPDSA1102)
中国矿业大学大学生创新创业基金资助项目(2013DXS02)
关键词
卫星钟差预报
拟合推估
协方差函数
两步极小解法
satellite clock error forecasting
collocations
covariance function
two steps＇ minimization
