Ns-level time reproduction method for controlling crystal oscillator based on satellite common view observation

The invention provides an ns-level time reproduction method for controlling a crystal oscillator based on satellite common view observation. A 10MHz frequency signal outputted by the crystal oscillator is utilized as an external reference frequency signal of a user-side satellite common-view receiver, and a 1PPS time signal outputted by the receiver homologous with the crystal oscillator is a timesignal reproduced by a user side; then the satellite common-view technology is utilized, the time signal reproduced by the user side is compared with a state time service center main clock (UTC (NTSC)), interactive observation of time difference data is performed, time deviation data of the reproduction time of the user side relative to the observation time of the UTC (NTSC) is obtained. Performance parameters of the crystal oscillator are fitted by utilizing the observation time deviation data, the crystal oscillator is controlled, so a time signal of which the performance is equivalent to that of UTC (NTSC) is repr