基于基准站观测数据的GPS实时星历解算研究

GPS Real-Time Ephemeris Calculation Research Based on Base Station Observation Data

轨道误差是GNSS导航定位应用中的重要影响因素之一。以3h为操作窗口,介绍了实时星历解算方法和实际操作流程。通过对GPS跟踪基准站的不同分布和数量解算的卫星实时星历成果与IGS发布的精密星历成果比对分析,采用区域基准站、全球基准站的方式对卫星实时定轨精度均有较大幅度提高。综合分析后进一步得知,选择合适的跟踪基准站数量对实时定轨成果影响也是至关重要的。将不同范围和数量的跟踪站分别解算的实时星历成果进行类比分析,进一步学习研究GNSS定轨的理论和方法,更好地为我国北斗导航系统实际应用服务。

Orbit error is one of the most important factors in the application of GNSS navigation and positioning.Take 3has the operating window,real-time ephemeris calculation method and practical processing is introduced.Through the comparison of the satellite ephemeris real-time results calculating on the different distribution and number of GPS tracking reference station and the IGS precise ephemeris released results,we find out that,adopt the way of regional benchmark station,the global benchmark station,real-time satellite orbit determination precision are greatly improved.Further comprehensive analysis,select the appropriate number of benchmark tracking station effect on real time orbit determination results is also very important.Analogy analysis of real-time ephemeris results were calculated by different scope and number of tracking stations.Further study on the theory and method of GNSS orbit determination is better for the actual application services of China's compass navigation system.