In this work we present a study of the determination of frequency transfer uncertainty in time series measurements. The first part of this paper is dedicated to the theoretical study of the frequency uncertainty in relation to the Allan deviation by applying the law of the propagation of uncertainty and a spectral analysis approach. In the next part the theoretical results are compared with simulated results and we use real clock and time transfer data to verify the analytical results. In the third section an experimental analysis of frequency transfer uncertainty is carried out. In situations where at least two transfer techniques are available a first difference statistic is used to determine the type and level of the transfer noise for transfer methods such as common-view GPS, carrier-phase GPS, and two-way time transfer. Frequency transfer uncertainties approaching 1×10-16 at 30 days are possible. Finally, a method is examined for estimating the frequency transfer uncertainty in situations where only one transfer technique is available, such as frequency transfer into TAI. A comparison between analytical and experimental results is presented in Section 2.5.
Pub Type: Journals
frequency transfer, uncertainty, atomic frequency standards, TAI