摘要
增加第三民用频率L5载波是GPS现代化措施中的一项,目前美国已经有4颗卫星具有L5观测值。从L5的信号结构上进行分析,应用L5载波的实际观测数据,与L1载波和L2载波相比较,L5载波不但在信噪比上得到提高,而且其多路径效应的影响也比较小,具有较好的数据观测质量。
In 1999,the GPS modernization measures are proposed.One of the main measures is to increase the third civil carrier frequency L5,which can not only be used to form a linear combination with the other two carrier phase,but also reduce the influence of the ionospheric delay.It presents the L5 signal structure firstly by the actual observation data.And then it analyzes the new L5 carrier compared with L1 carrier and L2 carrier,which can conclude that the signal-to-noise ratio is improved,and the influence of the multipath effect is small.
出处
《测绘工程》
CSCD
2014年第12期8-11,共4页
Engineering of Surveying and Mapping
基金
国家自然科学基金资助项目(41004010)
关键词
GPS现代化
L5载波
多路径效应
信号质量分析
GPS modernization
L5carrier phase
multipath effect quality analysis of signal
