多系统融合全球电离层建模研究
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摘要
近年来,我国BDS的建设和应用为GNSS电离层研究带来了新的机遇和挑战。本文采用中国测绘科学研究院i GMAS分析中心数据,构建了三系统融合全球电离层球谐函数模型,并对结果进行分析。研究表明:除去精度较差的海洋区域,在大陆地区,多系统融合全球电离层建模结果能较精确地表达电离层VTEC;对比三系统差分码偏差DCB的精度统计结果,GPS卫星系统C1P2码偏差均小于1 ns,大部分在0.5 ns以内,精度最高;GLONASS卫星系统C1P2码偏差均小于2 ns,精度比GPS系统略低;BDS卫星系统B1B2码偏差均小于1 ns,精度比GLONASS系统略高,但不如GPS系统稳定,码偏差随年积日变化较大,可能是BDS系统星座结构不完善的原因。
In recent years,the construction and application of BDS in China have brought new opportunities and challenges for the study of the GNSS ionosphere.Based on the data from i GMAS analysis center of Chinese Academy of Surveying and Mapping,a global system of ionospheric spherical harmonic function is built up by three systems,and the results are analyzed. The research shows that the poor performance of marine areas removed in the mainland,multisystem integration of global ionospheric modeling results can accurately express the ionospheric VTEC; the accuracy of statistical results of code deviation DCB contrast three system,GPS satellite system C1 P2 code deviation is less than 1 ns,most of the highest accuracy within 0.5 ns,GLONASS satellite; C1 P2 code deviation is less than 2 ns,the accuracy is slightly lower than the GPS system; BDS satellite system B1 B2 code deviation is less than 1 ns,the precision is slightly higher than the GLONASS system,but GPS has better stability,with the product code deviation of daily variation is large,may cause the constellation structure of the BDS system is not perfect.
In recent years,the construction and application of BDS in China have brought new opportunities and challenges for the study of the GNSS ionosphere.Based on the data from i GMAS analysis center of Chinese Academy of Surveying and Mapping,a global system of ionospheric spherical harmonic function is built up by three systems,and the results are analyzed. The research shows that the poor performance of marine areas removed in the mainland,multisystem integration of global ionospheric modeling results can accurately express the ionospheric VTEC; the accuracy of statistical results of code deviation DCB contrast three system,GPS satellite system C1 P2 code deviation is less than 1 ns,most of the highest accuracy within 0.5 ns,GLONASS satellite; C1 P2 code deviation is less than 2 ns,the accuracy is slightly lower than the GPS system; BDS satellite system B1 B2 code deviation is less than 1 ns,the precision is slightly higher than the GLONASS system,but GPS has better stability,with the product code deviation of daily variation is large,may cause the constellation structure of the BDS system is not perfect.
引文
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[12]王虎,王解先.基于GPS技术实时监测2009年7月22日日全食长三角区域电离层TEC变化[J].地球物理学报,2011,54(7):1718-1726.
[13]郭东晓,党金涛,李建文,等.i GMAS全球电离层延迟模型及并行计算策略[J].测绘科学技术学报,2015,32(4):357-360.
[14]王成,王解先,段兵兵.附有国际参考电离层约束的全球电离层模型[J].武汉大学学报(信息科学版),2014,39(11):1340-1346.
[15]余明,郭际明,过静珺.GPS电离层延迟Klobuchar模型与双频数据解算值的比较与分析[J].测绘通报,2004(6):5-8.
[2]耿长江.利用地基GNSSS数据实时监测电离层延迟理论与方法研究[D].武汉:武汉大学,2011.
[3]张小红,李征航,蔡昌盛.用双频GPS观测值建立小区域电离层延迟模型研究[J].武汉大学学报(信息科学版),2001,26(2):140-143.
[4]章红平,韩文慧,黄玲,等.地基GNSS全球电离层延迟建模[J].武汉大学学报(信息科学版),2012,37(10):1186-1189.
[5]党亚民,王虎,赵文娇,等.融合BDS/GPS/GLONASS反演全球电离层特性研究[J].大地测量与地球动力学,2015,35(1):1-5.
[6]章红平,施闯,唐卫民.地基GPS区域电离层模型与硬件延迟统一解算分析[J].武汉大学学报(信息科学版),2008,33(8):805-809.
[7]袁运斌.基于GPS的电离层监测及延迟改正理论与方法的研究[D].北京:中国科学院研究生院,2002.
[8]ZOU L,RISHBETH H,MULLER C F,et al.Annual and Semiannual Variations in the Ionospheric F2-layer:I.Modeling[J].Annales Geophysicae,2000,18(8):927-944.
[9]王虎.地基和空基GPS电离层反演技术的研究及其应用[D].上海:同济大学,2012.
[10]唐卫民.GPS载波相位平滑伪距精度分析与应用探讨[J].测绘信息工程,2005,30(3):37-39.
[11]耿长江,章红平,翟传润.应用Kalman滤波实时求解硬件延迟[J].武汉大学学报(信息科学版),2009,30(11):1309-311.
[12]王虎,王解先.基于GPS技术实时监测2009年7月22日日全食长三角区域电离层TEC变化[J].地球物理学报,2011,54(7):1718-1726.
[13]郭东晓,党金涛,李建文,等.i GMAS全球电离层延迟模型及并行计算策略[J].测绘科学技术学报,2015,32(4):357-360.
[14]王成,王解先,段兵兵.附有国际参考电离层约束的全球电离层模型[J].武汉大学学报(信息科学版),2014,39(11):1340-1346.
[15]余明,郭际明,过静珺.GPS电离层延迟Klobuchar模型与双频数据解算值的比较与分析[J].测绘通报,2004(6):5-8.