Analysis of error sources on orbital atomic clocks’ stability

As a rule, stability calculation of atomic clock requires observations with equivalent sampling interval. Apart from atomic clocks in laboratory, orbital atomic clock stability calculations are impacted of raw data sampling intervals, noncontinuous time series, non-data segment, frequency drift, and other factors. So, the calculated stability results are not so exact. In this article, the impacts of kinds of error sources on Allan and Hadamard variances are analyzed using global positioning system satellite precise clock offset data. And the laws of variety are summarized.