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针对北斗卫星导航系统空间信号完好性监测问题,提出一种新的基于超快精密星历的空间信号完好性监测(UPSIM)算法。通过将超快精密星历与广播星历之差映射到用户方向求取空间信号监测阈值,建立了数学模型,并采用北斗卫星导航系统超快精密星历进行了算法验证。实验结果表明,采用UPSIM算法可以实现接收机端空间信号完好性的实时监测和预测,并有效识别卫星空间信号故障。
Aiming at the space signal integrity monitoring of BeiDou satellite navigation system, a new space signal integrity monitoring (UPSIM) algorithm based on ultra-fast precise ephemeris is proposed. By mapping the difference between the super-fast precise ephemeris and broadcast ephemeris to the user’s direction for obtaining the spatial signal monitoring threshold, a mathematical model is established and the algorithm is verified by the ultrafast precise ephemeris of the Beidou satellite navigation system. The experimental results show that the UPSIM algorithm can realize the real-time monitoring and prediction of the signal integrity of the receiver space and effectively identify the satellite space signal failure.