中文摘要：

分析了单频精密单点定位的难点——电离层延迟改正和周跳探测,讨论了单频观测模式下电离层延迟的模型改正和半合改正两种解决方法。在此基础上,利用自主研发的单频精密单点定位软件同时处理多组数据,比较使用不同的电离层改正方法的影响。结果表明,半合改正计算结果优于格网模型改正法。利用全球不同地区多天的数据进行单频精密单点定位,单频精密单点定位可以达到dm级的精度。

英文摘要：

We analyze the difficulties of single-frequency precise-point-positioning, including ionosphere delay and cycle slip detection. Two solutions of ionosphere delay in single-frequency mode are discussed. Based on these studies, we developed a precise point positioning software for single-frequency observation and use it to deal with the same data with two different methods. The results show that the second solution is better than the first one. Finally, 30 d data of different parts of the world were analyzed using this software, and the results prove that the single-frequency PPP accuracy can reach a dm level.