GPS卫星钟噪声类型分析

The noise type analysis of GPS satellite clocks

介绍了原子钟的噪声模型及表征原子钟稳定度的Allan方差,给出了两种(斜率法和两种Allan方差比较法)确定原子钟噪声类型的方法,并利用这两种方法分析了几颗GPS卫星钟的噪声类型,得出不同种类卫星钟的噪声类型不同,同一种类卫星钟的噪声类型也不完全相同。

In this paper, the atomic clock’s noise model and the Allan variance for representing the atomic clock’s stability are introduced. Then two methods(slope method and t comparison method of two Allan variances)of determining the atomic clock’s noise type are discussed, and using these two methods, several on-board clocks of GPS satellites are analyzed. The results show that the different clock types of GPS satellites have different noise types and the same type clocks of GPS satellites have different noise types.