ABSTRACT
The distribution of atmospheric refraction introduces timing deviation to earth-to-satellite time transfer based on dual wavelength. In this paper, real-world meteorological data is used to construct a model that can describe the influence of atmospheric refraction distribution on the time transfer. The variation in asymmetric delay deviation and transceiver position deviation with region, month and zenith angle is studied by simulation. Results indicate that a decrease in atmospheric pressure and an increase in atmospheric temperature cause a decrease in the time deviation. The timing deviation caused by the inhomogeneous distribution of atmospheric density and atmospheric dispersion reaches the order of nanoseconds and can be reduced to ten picoseconds through further bidirectional precision alignment. During satellite covering, asymmetric delay deviation and transceiver position deviation vary with zenith angle and geographical position of ground terminals. Therefore, there is a need for real-time correction of the time deviation.
