北斗二代双频数据质量分析
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摘要
对北斗二代卫星的双频观测数据进行了质量分析,包括伪距多路径误差和信噪比两个方面。大量实测数据测试表明:北斗GEO、IGSO和MEO三类卫星的多路径误差逐渐增大,且B1频点小于B2频点,GPS与北斗MEO卫星的伪距多路径误差相差不大;另外,北斗三类卫星均表现出载波B2的信噪比略大于B1,而GPS卫星则表现出L1载波信噪比要大于L2。
Analyze the quality of the second generation BDS double frequency observations,including multipath error of pseudo range and SNR aspects. Large amount of data tests show that: the multipath error of BDS GEO,IGSO and MEO satellites increase gradually,and of which the B1 frequency is less than B2 frequency,besides,there is little difference between the multipath error of pseudo range in GPS and BDS MEO satellites. On the other hand,the three types of BDS satellites all show that the SNR of B2 frequency is slightly larger than B1 frequency,but GPS satellites show that the SNR of L1 is larger than L2 frequency.
Analyze the quality of the second generation BDS double frequency observations,including multipath error of pseudo range and SNR aspects. Large amount of data tests show that: the multipath error of BDS GEO,IGSO and MEO satellites increase gradually,and of which the B1 frequency is less than B2 frequency,besides,there is little difference between the multipath error of pseudo range in GPS and BDS MEO satellites. On the other hand,the three types of BDS satellites all show that the SNR of B2 frequency is slightly larger than B1 frequency,but GPS satellites show that the SNR of L1 is larger than L2 frequency.
引文
[1]谭树森.卫星导航定位工程[M].北京:国防工业出版社,2010.
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[6]Townsend B R,Fen ton P C,Van Dierendonck K.L1 Carrier Phase Multipath Error Reduction Using MEDLLTechnology[R].California:ION Palm Springs,1995.
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[2]丁锐.利用TEQC软件对GNSS连续参考站选址的数据分析[J].城市勘测,2009(1):56-59.
[3]陈中新,系长元.应用TEQC对GPS连续参考站数据进行质量分析[J].全球定位系统,2007,33(3):228-231.
[4]范士杰,郭际明.TEQC在GPS数据预处理中的应用于分析[J].测绘信息与工程,2004(29):33-35.
[5]刘志强,黄张裕,金建平.利用卫星高度角和信噪比提高GPS定位质量的验分析[J].测绘工程,2008,17(4):54-58.
[6]Townsend B R,Fen ton P C,Van Dierendonck K.L1 Carrier Phase Multipath Error Reduction Using MEDLLTechnology[R].California:ION Palm Springs,1995.
[7]Braasch M S.Performance Comparison of Multipath Mitigating Receiver Architectures[J].IEEEAerospace Conference Proceedings,2001(3):31 309-31 315.