摘要
利用实际采集的数据,从信噪比和定位残差上分析了L2载波的数据质量,指出GPS现代化后,用L2C码恢复的L2载波信噪比明显提高,与L1载波信噪比接近,两者的差值仅在5 dBHz以内;用L2C码恢复的L2载波比GPS现代化前的L2载波的信噪比更加稳定,不容易受卫星高度角的影响;同时利用L2C码恢复的L2载波的定位残差比没有L2C码的L2载波小,定位精度明显提高。
Using the actual data collection, the quality of L2 carrier phase is analyzed in two respects, which are SNR and the positioning residual error. Some conclusions are given. Firstly, the SNR of L2 carrier phase resumed by L2 C code is improved obviously, almost close to the SNR of L1 carrier, with a difference of less than 5 dBHz. Secondly, it has a more stable SNR than that obtained before GPS modernization. Meanwhile, the positioning residual error is smaller than L2 carrier phase without L2 C code, which can significantly improve positioning accuracy.
出处
《武汉大学学报（信息科学版）》
EI
CSCD
北大核心
2008年第8期779-782,共4页
Geomatics and Information Science of Wuhan University
基金
国家测绘局南极考察地区基础测绘资助项目(146990711109-1)
国家教育部留学回国人员科研启动基金资助项目
关键词
GPS现代化
L2C码
残差
重建载波
GPS modernization
L2 C code
residual error
reconstructed carrier phase
