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。
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.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2009年第7期778-781,共4页
Geomatics and Information Science of Wuhan University
基金
国家863计划资助项目(2006AA12Z323
2007AA12Z309
2007AA120603)
关键词
单频
精密单点定位
电离层
周跳
single-frequency
precise-point-positioning
ionospheres delay
cycle slip
