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| GPS现代化后L_2载波的定位精度研究 | |
| 引用本文： | 王泽民, 邱蕾, 孙伟, 王海军. GPS现代化后L_2载波的定位精度研究[J]. 武汉大学学报 ( 信息科学版), 2008, 33(8): 779-782. |
| 作者姓名： | 王泽民 邱蕾 孙伟 王海军 |
| 作者单位： | 1武汉大学测绘学院,武汉市珞喻路129430079;2武汉大学灾害监测与防治研究中心,武汉市珞喻路129,430079;3武汉市勘测设计研究院,武汉市江汉区万松园路209号430022;4青州市二炮士官学校训练团作战保障教研室,青州市262500 |
| 基金项目： | 国家测绘局南极考察地区基础测绘资助项目 , 国家教育部留学回国人员科研启动基金 |
| 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。 |
| 关 键 词： | GPS现代化 L2C码 残差 重建载波 |
| 收稿时间： | 2008-06-15 |
| 修稿时间： | 2008-06-15 |
Accuracy Analysis of L2 C Code of Dual Frequency GPS Receiver |
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| WANG Zemin, QIU Lei, SUN Wei, WANG Haijun. Accuracy Analysis of L_2 C Code of Dual Frequency GPS Receiver[J]. Geomatics and Information Science of Wuhan University, 2008, 33(8): 779-782. | |
| Authors: | WANG Zemin QIU Lei SUN Wei WANG Haijun |
| Affiliation: | 1School of Geodesy and Geomatics,Wuhan University,129 Luoyu Road,Wuhan 430079,China;2Research Center for Hazard Monitoring and Prevention,Wuhan University,129 Luoyu Road,Wuhan 430079,China;3Wuhan Geotechnical Engineering and Surveying Institute,129 Luoyu Road,Wuhan 430022,China;4The Second Artillery Petty Officer School,Qingzhou 262500,China |
| Abstract: | 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. |
| Keywords: | GPS modernization L2 C code residual error reconstructed carrier phase |
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