利用广义延拓法进行GPS精密钟差插值的实际效果

Actual Effect of GPS Precision Clock Offset Interpolation by Generalized Continuation Method

GPS精密钟差插值是精密单点定位中的一项重要工作,且其插值精度会直接影响到定位精度。针对传统内插和拟合方法的不足,采用广义延拓法将间隔为5min的GPS精密钟差插值到30s间隔,探讨其插值精度与三个参数之间的关系,并与传统插值方法作比较。结果表明:利用广义延拓法进行GPS精密钟差插值相比传统插值方法有优势,在参数r、t、s分别取2、3、4时该方法的插值精度比较理想,能够满足精密单点定位的精度要求。

GPS precision clock offset interpolation is an important work in precise point positioning,and the interpolation accuracy will directly affect the positioning accuracy. Aiming at the shortcomings of the traditional interpolation and fitting method,in this paper the generalized continuation method is use to change the GPS precision clock offset for an interval from 5 min to 30 s. The relationship between the interpolation precision and the value of three parameters is discussed,and the method is compared with the traditional interpolation method. The results show that compared with the traditional interpolation method,using the generalized continuation method has advantages in the aspect of GPS precision clock offset interpolation. The interpolation accuracy is quite ideal when the parameter r,t and s is 2,3 and 4 respectively,which can satisfy the accuracy demands of precise point positioning.