广义延拓法在IGS精密星历插值中的应用  

Application of Generalized Extended Method in IGS Precise Ephemeris Interpolation

作　　者：史卫平[1] 刘翔[2] 

机构地区：[1]山东农业工程学院国土资源与测绘工程系,山东济南250100 [2]山东科技大学测绘学院,山东青岛266590

出　　处：《测绘与空间地理信息》2014年第11期143-145,共3页Geomatics & Spatial Information Technology

摘　　要：利用广义延拓插值法对IGS精密星历进行插值,探讨了广义延拓插值数学模型中单元域节点、延拓域节点、逼近函数项数三个参数与插值精度之间的关系,并与传统经典的Lagrange多项式插值法进行比较分析。实际算例表明,只要选取适当的参数,广义延拓插值法拥有比Lagrange多项式插值法更高的精度。The generalized extension interpolation is used to interpolate the IGS precise ephemeris .Besides, discuss the interpolation accuracy and the relationship with the three parameters of unit node , the continuation field domain node , approximating function item number in generalized extended interpolation mathematical model , the results are compared with Lagrange polynomial interpolation . The result shows that as long as select appropriate parameters , the generalized extension interpolation method has higher precision than though Lagrange polynomial interpolation method .

关 键 词：精密星历 LAGRANGE 广义延拓 插值 

分 类 号：P228.4[天文地球—大地测量学与测量工程] TP301.6[天文地球—测绘科学与技术]