GNSS卫星钟差实时估计与分析

Real-time estimation and analysis of GNSS satellite clock

卫星实时钟差求解是GNSS实时位置服务的关键。针对GNSS实时钟差估计过程中待估参数过多的问题,综合高精度估计的非差法与快速解算的历元间差分法优势,采用顾及ISB/IFB参数的GNSS卫星钟差实时混合估计方法,对卫星钟差的实时估计效率、估计精度进行分析,并利用精密单点定位对实时钟差产品进行验证。结果满足高精度导航定位用户的需求。

Satellite real-time clock offset solving is the key to GNSS real-time location service. This paper, for the problem of too many parameters to be estimated in the GNSS real-time clock offset estimation process, considers the advantage of high precision estimation non-difference method and fast solution difference method between epochs, adopts the method of the GNSS satellite mixing real-time clock offset with considering the ISB/IFB parameters, analyzes the the real-time estimation efficiency and estimation accuracy of the satellite clock offset, and verifies the real-time clock offset product by using precise single point positioning method. The result can satisfy the requirement of high-precision navigation and positioning users.