Abstract: | Based on the relationship between the noise characteristics of the frequency source and the power-law spectral densities, a virtual clock error sequence model for reverse generation by the target stability of the frequency source is constructed, then the long-term clock difference data of the target frequency source can be generated quickly and efficiently by the virtual clock difference sequence model. According to the combined noise characteristics of different types of frequency sources, the traditional noise model is used to generate five kinds of frequency source noise, and then the simulation analysis is used to verify the correctness of the generation model of the virtual clock error sequence. By comparing the simulation results, it can be seen that the stability of the virtual clock error sequence based on rubidium clock, hydrogen clock and cesium clock is basically consistent with the stability of the measured clock error sequence, and the reconstruction of the virtual clock error sequence can scientifically and accurately reflect its frequency noise characteristics, therefore, the method of generating clock difference sequence using the stability of the target frequency source is feasible and effective. |