The error model and the method analysis of TWSSTT for a low-rate dynamic object

The method aimed at enhancing precision of the two-way satellite time transfer for a low-speed dynamic object is presented in this paper. Calculous and vector algebra are used to analysis the precision of two way satellite time transfer when one of the station is a low-rate dynamic object, such as one satellite-communication station on a vessel. Mathematic model of the precision is hence obtained. Experimental results show that the main factors which affect the precision of the two-way satellite time transfer mainly includes a velocity and a course of the vessel, an elevation of the antenna, measure periods, a rise-fall range and period, a measure starting time and a initialization phase.