IGS产品在GPS时间比对中的应用

Use of IGS Products in GPS Common View

在利用GPS CV(GPS Common View)技术进行高精度时间比对时,电离层和卫星位置误差对观测到的卫星信号的影响是不容忽视的,需要对它进行精确的估计和改正.讨论IGS精密星历和CODE全球总电子含量图(TEC MAPs)在GPS时间传递中的应用.计算结果表明,采用IGS产品可有效提高单站定时和远距离时间传递的精度.

When using GPS to compare distant clocks, the errors of satellite orbit and ionopheric delays of the received signals can be lead to significant errors and, therefore, need to be estimated and corrected. Several IGS (International GPS Service) analysis centers now provide precise orbits and global ionosphere maps. We show the improvements in stability and accuracy resulting from the use of IGS products in this paper.