基于历元间差分模型的精密钟差加密算法研究

提出一种高精度的钟差加密方法。采用历元间差分载波相位观测值，得到高精度历元间相对卫星钟差，并应用这一相对钟差产品对IGS 5 min钟差进行加密，获得30 s采样的“高频度”钟差。与数学插值算法相比，该加密算法有一定的优越性，加密误差在0.03 ns以内，且不同稳定度的星载钟差异较小。

Research on Precise Clock Corrections Densification Based on Epoch Differential Model

In this paper,an epoch-difference GNSS clock densification algorithm is tested.The high precision relative satellite clock bias is obtained by epoch-difference carrier phase observation.By using relative clock results,the high-rate 30 s satellite clock products are then densified from IGS 5 min interval precise satellite clock products.The results show that compared with mathematical interpolation methods,the epoch-difference clock densification algorithm has better performance.The densification precision using the epoch differential model is below 0.03 ns.Furthermore, the differential among different types of satellite clock is small.