北斗卫星钟差频间偏差及对定位精度影响分析
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摘要
基于文献[1]历元间差分方法,通过加权对其进行改进以获得准确值,给出了方法的基本实施要点,分析了解算卫星钟差频间偏差(inter-frequency clock bias,IFCB)与测站位置的相关性,分析了噪声与高度角的联系,利用部分北斗GEO卫星、IGSO卫星IFCB良好的天周期性,将前一天数据计算得到的IFCB改正值用于第二天基于B1/B3的北斗精密单点定位,并从定位精度评估其对定位性能的改善情况。实验结果表明,IFCB只与时间和卫星相关,而与测站位置无关,可以削弱低高度角带来的噪声影响,从而有效改善定位精度。
A weighted approach based on the epoch-differenced approach by Li Haojun is proposed to estimate the inter-frequency clock bias(IFCB)in the paper,which is expected to obtain accurate values through a weighted method.The basic implementation of the method is given,and the correlation between the IFCB and the position of the station is analyzed,so is the relationship between the noise and the height angle.IFCB has a significant daily period and there is a high correlation between IFCB of two adjacent days for part of GEO and IGSO satellites.When the extracted IFCB of the first day is used to correct the B_1/B_3 ionosphere-free observations of the second day,the B_1/B_3 based on BeiDou PPP would attain higher positioning accuracy.The results indicate that IFCB is only related to time and satellite having nothing to do with the station location.The method of this paper can weaken the impact of low altitude angle noise thus effectively improving the positioning accuracy.
A weighted approach based on the epoch-differenced approach by Li Haojun is proposed to estimate the inter-frequency clock bias(IFCB)in the paper,which is expected to obtain accurate values through a weighted method.The basic implementation of the method is given,and the correlation between the IFCB and the position of the station is analyzed,so is the relationship between the noise and the height angle.IFCB has a significant daily period and there is a high correlation between IFCB of two adjacent days for part of GEO and IGSO satellites.When the extracted IFCB of the first day is used to correct the B_1/B_3 ionosphere-free observations of the second day,the B_1/B_3 based on BeiDou PPP would attain higher positioning accuracy.The results indicate that IFCB is only related to time and satellite having nothing to do with the station location.The method of this paper can weaken the impact of low altitude angle noise thus effectively improving the positioning accuracy.
引文
[1]Li Haojun,Zhou Xuhua,Wu Bin,et al.Estimation of the Inter-Frequency Clock Bias for the Satellites of PRN25 and PRN01[J].Science China Physics,Mechanics and Astronomy,2012,55(11):2 186-2 193
[2]杨元喜,李金龙,徐君毅,等.中国北斗卫星导航系统对全球PNT用户的贡献[J].科学通报,2011,56(21):1 734-1 740
[3]Montenbruck O,Hugentobler U,Dach R,et al.Apparent Clock Variations of the Block IIF-1(SVN62)GPS Satellite[J].GPS Solutions,2012,16(3):303-313
[4]Montenbruck O,Hauschild A,Steigenberger P,et al.Initial Assessment of the COMPASS/BeiDou-2Regional Navigation Satellite System[J].GPS Solutions,2013,17(2):211-222
[5]Hauschild A,Steigenberger P,Rodriguez-Solano C.Signal,Orbit and Attitude Analysis of Japan's First QZSS Satellite Michibiki[J].GPS Solutions,2012,16(1):127-133
[6]Li Haojun,Zhou Xuhua,Wu Bin.Fast Estimation and Analysis of the Inter-Frequency Clock Bias for Block IIF Satellites[J].GPS Solutions,2013,17(3):347-355
[7]Li Haojun,Chen Yanling,Wu Bin,et al.Modeling and Initial Assessment of the Inter-Frequency Clock Bias for COMPASS GEO Satellites[J].Advances in Space Research,2013,51(12):2 277-2 284
[8]付宁波,陈艳梅,黄霞飞.基于GPS跟踪站的精密单点定位精度分析[J].测绘地理信息,2015,40(4):29-31
[9]冯来平.GPS多频观测数据处理方法及应用研究[D].郑州:信息工程大学,2009
[10]Montenbruck O,Steigenberger P,Schnemann E,et al.Flight Characterization of New Generation GNSS Satellite Clocks[J].Navigation,2012,59(4):291-302
[11]李盼,郭斐,刘季.实时精密单点定位中的数据预处理研究[J].测绘地理信息,2012,37(5):29-32
[12]Zhao Qile,Sun Binzi,Dai Zhiqiang,et al.Real-Time Detection and Repair of Cycle Slips in Triple-Frequency GNSS Measurements[J].GPS Solutions,2015,19(3):381-391
[2]杨元喜,李金龙,徐君毅,等.中国北斗卫星导航系统对全球PNT用户的贡献[J].科学通报,2011,56(21):1 734-1 740
[3]Montenbruck O,Hugentobler U,Dach R,et al.Apparent Clock Variations of the Block IIF-1(SVN62)GPS Satellite[J].GPS Solutions,2012,16(3):303-313
[4]Montenbruck O,Hauschild A,Steigenberger P,et al.Initial Assessment of the COMPASS/BeiDou-2Regional Navigation Satellite System[J].GPS Solutions,2013,17(2):211-222
[5]Hauschild A,Steigenberger P,Rodriguez-Solano C.Signal,Orbit and Attitude Analysis of Japan's First QZSS Satellite Michibiki[J].GPS Solutions,2012,16(1):127-133
[6]Li Haojun,Zhou Xuhua,Wu Bin.Fast Estimation and Analysis of the Inter-Frequency Clock Bias for Block IIF Satellites[J].GPS Solutions,2013,17(3):347-355
[7]Li Haojun,Chen Yanling,Wu Bin,et al.Modeling and Initial Assessment of the Inter-Frequency Clock Bias for COMPASS GEO Satellites[J].Advances in Space Research,2013,51(12):2 277-2 284
[8]付宁波,陈艳梅,黄霞飞.基于GPS跟踪站的精密单点定位精度分析[J].测绘地理信息,2015,40(4):29-31
[9]冯来平.GPS多频观测数据处理方法及应用研究[D].郑州:信息工程大学,2009
[10]Montenbruck O,Steigenberger P,Schnemann E,et al.Flight Characterization of New Generation GNSS Satellite Clocks[J].Navigation,2012,59(4):291-302
[11]李盼,郭斐,刘季.实时精密单点定位中的数据预处理研究[J].测绘地理信息,2012,37(5):29-32
[12]Zhao Qile,Sun Binzi,Dai Zhiqiang,et al.Real-Time Detection and Repair of Cycle Slips in Triple-Frequency GNSS Measurements[J].GPS Solutions,2015,19(3):381-391