一种提高精密单点定位实时性的方法

摘要

The obtain of the precise clock error PPP needs at least two days time delay.By extracting satellite clock error data from the ultrafast ephemeris released the same day by IGS,this paper interpolates the clock error data,and uses the generated format interpolation results for PPP,which can improve the real-time location of PPP at about 3~9 hours.Based on the Bernese software,it uses the generated clock error data and ultrafast ephemeris file for a large number of measured data with PPP.The results show that for 4 hours observational data,this method can reach centimeter level accuracy,while the observation time is greater than 6 hours,the solver accuracy can be stabilized at between 1 cm to 5 cm.%由于要获取PPP需要的精密钟差文件至少有2 d的时间延迟，因此通过提取 IGS当天发布的超快星历中的卫星钟差数据，并对钟差数据进行插值，将插值结果做成标准格式钟差数据文件应用到 PPP 中，可以将精密单点定位的实时性提高为3~9 h。基于Bernese软件，采用生成的钟差文件以及当天的超快星历文件对大量实测数据进行PPP。结果表明，对于4 h的观测数据，该方法解算精度达到厘米级；当观测时间大于6 h时，解算精度基本能够稳定在1~5 cm。