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The principle of predictable weighting algorithm is that a good clock is a predictable clock, we observed that deterministic signature such as frequency drift and ageing do not affect time scale stability if well predicted in studies of the algorithm. The clock difference is a non-stationary random process, in order to reduce noises of atomic clock, improve the stability of time scale, wavelet muti-scale...
Because of the effects of various kinds of noises and other factors, the state of running of an atomic clock is quite complicated. In order to precisely predict the exact variation in frequency or clock rate of the atomic clock, it is necessary to study and make a reliable prediction model and via the model the clock rate of the atomic clock is predicted so as to be adopted in the monitoring of the...
More recently, GPS carrier phase measurement using geodetic receivers is widely conducted for accurate time and frequency comparisons. Time transfer experiments were conducted using the Ashtech Z12T receivers whose internal frequency is provided by an external 20 MHz clock and an external 1 pps (pulse per second) of a reference clock. The results of time comparison has shown that the stability of...
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