摘要
阐述了广义延拓插值法的基本原理,并探讨了其在30s间隔的IGS精密卫星钟差产品的插值精度和其3个参数取值之间的关系。结果表明,当广义延拓插值法的单元域节点个数为3,逼近函数项数为4,延拓域节点个数为5时插值精度最好。其插值精度为0.031ns,等效距离精度为9.3mm。
The Generalized Extended Interpolation Method was introduced.The relationship between generalized extended interpolation precision and the choice of three parameters in CODE＇s 30 s precise clock offset was discussed.The results showed that,when the node number in unit domain,the number of Polynomial of Approximation function and the node number in extended domain were（3,4,5）,the interpolation precision was the best,that is,the interpolation precision was 0.031 ns and the equivalent distance accuracy was 9.3 mm.
出处
《测绘科学技术学报》
北大核心
2011年第6期404-406,共3页
Journal of Geomatics Science and Technology
关键词
全球定位系统
国际全球导航卫星系统服务
精密卫星钟差
广义延拓插值法
插值精度
GPS（Global Positioning System）
IGS（International GNSS Service）
precise clock offset
generalized extended interpolation method
interpolation precision
