GNSS非组合精密单点定位模型算法与应用

Model algorithm and applications of uncombined precise point positioning for GNSS

为了进一步发展全球卫星导航系统(GNSS)非组合精密单点定位技术(PPP),研究其算法和应用:构建非组合PPP从单频到多频、从单系统到多系统的满秩函数模型,并介绍各类非组合PPP模型的秩亏消除策略及待估参数形式;然后结合非组合PPP技术特色,论述其在对流延迟和电离层延迟提取、差分码偏差估计和精密授时方面的典型应用;最后针对最新发展动态,展望非组合PPP技术今后的发展趋势。

In order to further develop the technology of uncombined precise point positioning(PPP)for global navigation satellite system(GNSS),the paper studied on the algorithm and its application:the full-rank function models of un-combined PPP from single frequency to multi-frequency and from a single constellation to multi-constellation were constructed,and the strategy of the rank defect elimination and parameter forms of uncombined PPP models were introduced;then combined with the characteristics of uncombined PPP technology,its typical applications in extraction of tropospheric delay and ionospheric delay,estimation of difference code bias,and precise timing were discussed;finally,in view of the latest development state,the future growing trend of undifferenced uncombined PPP technology was prospected.