卫星导航用户观测数据实时模拟研究

针对卫星导航用户观测数据模拟具有高精度、高采样率、强实时性的要求,该文在研究卫星导航定位系统工作原理的基础上,建立了卫星导航用户观测数据实时模拟系统。详细论述了卫星导航用户观测数据模拟的原理、流程及所用到的数学模型。考虑到观测数据模拟的时间约束特性,将模拟系统划分为非实时层、弱实时层和强实时层3层结构,并采用多线程的处理方法。模拟算例结果表明:该系统具有正确性和可靠性,满足强实时性要求,适用于卫星导航用户观测数据模拟。

Real-time simulation of observation data for the satellite navigation users

Aiming at the requirements of high-precision,high sampling rate and strong real-time of observation data for the satellite navigation users,a real-time simulation system of satellite navigation users' observation data was built based on the study of satellite navigation and positioning system's working principle.The principles,processes and mathematical models of the real-time simulation system were described in detail in this paper.According to the time constraints of data simulation,the simulation system was divided into non real-time part,week real-time part and strong real-time part;at the same time,the multi-thread processing method was used.The results showed that the proposed simulation system has validity and reliability and meets the demand of strong real-time,which is applicable for the observation data simulation of satellite navigation users.