测绘与空间地理信息
測繪與空間地理信息
측회여공간지리신식
GEOMATICS & SPATIAL INFORMATION TECHNOLOGY
2014年
11期
143-145
,共3页
精密星历%Lagrange%广义延拓%插值
精密星歷%Lagrange%廣義延拓%插值
정밀성력%Lagrange%엄의연탁%삽치
precise ephemeris%Lagrange%generalized extension%interpolation
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。
利用廣義延拓插值法對IGS精密星歷進行插值,探討瞭廣義延拓插值數學模型中單元域節點、延拓域節點、逼近函數項數三箇參數與插值精度之間的關繫,併與傳統經典的Lagrange多項式插值法進行比較分析。實際算例錶明,隻要選取適噹的參數,廣義延拓插值法擁有比Lagrange多項式插值法更高的精度。
이용엄의연탁삽치법대IGS정밀성력진행삽치,탐토료엄의연탁삽치수학모형중단원역절점、연탁역절점、핍근함수항수삼개삼수여삽치정도지간적관계,병여전통경전적Lagrange다항식삽치법진행비교분석。실제산례표명,지요선취괄당적삼수,엄의연탁삽치법옹유비Lagrange다항식삽치법경고적정도。
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 .