基于小时观测文件拼接的GPS实时钟差确定算法

针对目前常用的GPS实时钟差确定算法主要基于实时观测数据流实现，使产品可靠性和完整性受限于网络质量，及广播星历和IGU-P精度较低的问题，提出并实现基于小时观测文件拼接的实时钟差确定算法。该算法基于小时观测文件数据，通过将钟差估计与自适应超短期钟差预报相结合以确定实时钟差。30 d实时在线结果显示，基于小时观测文件确定的实时钟差精度约为0.25 ns，优于广播星历和IGU-P，与IGS RTS提供的实时钟差精度相当，且能保证产品的可靠性和完整性。

GPS Real-Time Clock Bias Determination Algorithm Based on Connection of Hourly Observation Files

Abstract: Aiming at the problem that the current GPS real-time clock bias determination algorithm is based on real-time observation data stream, which limits the reliability and integrity of the product to the network quality, and that the accuracy of broadcast ephemeris and IGU-P is low, we propose and implement a real-time clock bias determination algorithm based on the connection of hourly observation files. The algorithm is realized based on hourly observation files data. By combining clock bias estimation with adaptive ultra-short-term clock bias prediction, the real-time clock bias is determined. 30 days online result shows that, STD of GPS real-time clocks generated by the connection method is 0.25 ns, equal to IGS RTS, much higher than STD of broadcast ephemeris and IGU-P. Furthermore, this method can improve the reliability and integrity of GPS real-time clocks.