摘要
GPS钟差的计算,可以通过精密星历内插所得。将IGS提供的15min精密星历内插到5min,其中分别用拉格朗日多项式、切比雪夫多项式法来进行内插,根据两种插值多项式分别比较分析在不同阶数情况下内插的精度。详细介绍了拉格朗日多项式、切比雪夫多项式插值法的基本原理,通过算例得出了拉格朗日与切比雪夫的拟合精度都可以满足精密定位需要,且切比雪夫插值的精度更高。
GPS clock error is calculated, precise ephemeris can be derived from interpola- tion. The main content of this thesis is to provide the IGS precise ephemeris interpolated 15 rain into the 5 min, whichwere used Lagrange polynomials, Chebyshev polynomial to be in- terpolated, and according to the selected interpolating polynomial to a comparative analysis of different order of interpolation accuracy. Details of the Lagrange polynomials, Chebyshev polynomial interpolation of the basic principles and their application are introduced. The ac- curacy of Lagrange polynomials can satisfy the precision requirement for GPS precise positio- ning, and the accuracy of the Chebyshev interpolation is higher .
出处
《全球定位系统》
2012年第3期75-78,共4页
Gnss World of China
关键词
GPS
精密星历
插值方法
卫星钟差
GPS
precise ephemeris
interpolation method
clock error
