改进CODE GIM的GNSS广播电离层模型评估方法
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摘要
针对如何有效地对各类电离层模型在建模实现、模型精度、模型时效性等方面进行综合评估问题,该文提出一种基于改进CODE模型(CODE+模型)全球电离层图(GIM)的预报电离层精度评估方法,通过增加我国陆态网监测站数据,提高我国及周边地区的电离层建模精度,弥补了CODE GIM在我国及周边地区因观测数据少而精度受限的不足。通过试验分析表明,改进CODE GIM能够满足精度要求,且更好地与我国实际电离层情况相吻合;并以此为基准评估GNSS广播电离层精度,对比分析了GPS、BDS、Galileo电离层模型的精度,得到一些初步结论。
Aiming at the problem of how to assess the various ionospheric models in the modeling implementation,model accuracy,model timeliness and other aspects totally and effectively.This paper proposed a new method that precision monitoring and assessment of broadcast ionospheric model of GNSS based on improved CODE model(CODE+model)global ionospheric map(GIM).The precision of ionospheric modeling in China and nearby could be improved by increasing the data of crustal movement observation network of China(CMONOC)stations in China.Finally,it maked up for the limited precision of CODE GIM in China due to lack of enough observation data.The experimental results showed that the accuracy of improved CODE GIM could meet the requirement and which could consistent with the actual ionosphere of China better.In addition,the precision of GNSS broadcast ionosphere was evaluated based on it.It could be concluded some meaningful results by comparing and analyzing the precision of GPS,BDS and Galileo ionospheric models.
Aiming at the problem of how to assess the various ionospheric models in the modeling implementation,model accuracy,model timeliness and other aspects totally and effectively.This paper proposed a new method that precision monitoring and assessment of broadcast ionospheric model of GNSS based on improved CODE model(CODE+model)global ionospheric map(GIM).The precision of ionospheric modeling in China and nearby could be improved by increasing the data of crustal movement observation network of China(CMONOC)stations in China.Finally,it maked up for the limited precision of CODE GIM in China due to lack of enough observation data.The experimental results showed that the accuracy of improved CODE GIM could meet the requirement and which could consistent with the actual ionosphere of China better.In addition,the precision of GNSS broadcast ionosphere was evaluated based on it.It could be concluded some meaningful results by comparing and analyzing the precision of GPS,BDS and Galileo ionospheric models.
引文
[1]李征航,黄劲松.GPS测量与数据处理[M].2版.武汉:武汉大学出版社,2010.(LI Zhenghang,HUANGJinsong.GPS surveying and data processing[M].2nd ed.Wuhan:Wuhan University Press,2010.)
[2]王伟钢.电离层误差对卫星导航系统测距误差影响分析[J].现代导航,2015,6(2):79-86.(WANGWeigang.Analysis on ionosphere delay error effect satellite navigation system error[J].Modern Navigation,2015,6(2):79-86.)
[3]焦文海,丁群,李建文,等.GNSS开放服务的监测评估[J].中国科学(物理学力学天文学),2011,41(5):521-527.(JIAO Wenhai,DING Qun,LI Jianwen,et al.Monitoring and assessment of GNSS open services[J].Scientia Sinica(Phys,Mech&Astron),2011,41(5):521-527.)
[4]张清华.GNSS监测评估理论与方法研究[J].测绘学报,2017,46(4):536.(ZHANG Qinghua.Researches on theory and method of GNSS monitor and assessment[J].Acta Geodaetica et Cartographica Sinica,2017,46(4):536.)
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[6]WU Xiaoli,HU Xiaogong,WANG Gang,et al.Evaluation of COMPASS ionospheric model in GNSS positioning[J].Advances in Space Research,2013,51(6):959-968.
[7]European Commission.European GNSS(Galileo)open service:ionospheric correction algorithm for galileo single frequency users(issue1.2)[EB/OL].[2017-09-04].https:∥www.gsc-europa.eu/electronic-library/programme-reference-documents.
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[9]刘帅,贾小林.GNSS电离层模型改正精度评估与分析[J].空间科学学报,2016,36(3):297-304.(LIU Shuai,JIA Xiaolin.Correction accuracy evaluation and analysis on GNSS ionosphere model(in Chinese)[J].Chin JSpace Sci,2016,36(3):297-304.)
[10]陈秀德,贾小林,朱永兴.广播电离层模型性能评估及分析[J].导航定位学报,2017,5(1):18-23.(CHENXiude,JIA Xiaolin,ZHU Yongxing.Performance estimation and analysis on broadcast ionospheric model[J].Journal of Navigation and Positioning,2017,5(1):18-23.)
[11]李施佳,蔡昌盛,戴吾蛟,等.NeQuick2电离层改正模型的性能评估[J].测绘工程,2015,24(1):40-43.(LI Shijia,CAI Changsheng,DAI Wujiao,et al.Performance evaluation of NeQuick2ionosphere model[J].Engineering of Surveying and Mapping,2015,24(1):40-43.)
[12]王泽民,毕通,孙伟,等.GNSS广播电离层模型在极区的改正效果分析[J].极地研究,2016,28(2):235-242.(WANG Zemin,BI Tong,SUN Wei,et al.Analysis of global navigation satellite system broadcast ionospheric model correction in polar rigions[J].Chinese Journal of Polar Research,2016,28(2):235-242.)
[13]Stefan Schaer Astronomical Institute,University of Berne sschaer.How to use CODE’s global ionosphere maps[EB/OL].[2017-09-04].http:∥aiuws.unibe.ch/ionosphere/.
[14]SCHAER S,GURTNER W,FELTENS J.IONEX:the ionosphere map exchange format version 1[C]∥Proceedings of the IGS Analysis Center Workshop.Darmstadt,Germany:[s.n.],1998.
[15]薛军琛,宋淑丽,朱文耀.区域布网为主的全球电离层模型建立与分析[C]∥第三届中国卫星导航学术年会论文集.[出版地不详]:[出版者不详],2012:89-102.(XUE Junchen,SONG Shuli,ZHU Wenyao.Construction and analysis for global ionospheric model mainly based on regional network[C]∥Procceding of the 3th China Satellite Navigation Conference.[S.l.]:[s.n.],2012:89-102.)
[16]章红平.基于地基GPS的中国区域电离层监测与延迟改正研究[D].上海:中国科学院研究生院(上海天文台),2006.(ZHANG Hongping.Study on GPS based China regional ionosphere monitoring and ionospheric delay correction[D].Shanghai:Graduate University of Chinese Academy of Sciences(Shanghai Astronomical Observatory),2006.)
[17]DACH R,HUGENTOBLER U,FRIDEZ P.Bernese GPS Software Version 5.0[Z].Bern:Astronomical Institute,University of Berne,2007.
[18]李子申.GNSS/Compass电离层时延修正及TEC监测理论与方法研究[D].北京:中国科学院大学,2012.(LI Zishen.Study on the mitigation of ionospheric delay and the monitoring of global ionospheric TECbased on GNSS/Compass[D].Beijing:University of Chinese Academy of Sciences,2012.)
[19]LIU Libo,WAN Weixing,CHEN Yiding,et al.Solar activity effects of the ionosphere:a brief review[J].Chinese Science Bulletin,2011,56(12):1202-1211.
[2]王伟钢.电离层误差对卫星导航系统测距误差影响分析[J].现代导航,2015,6(2):79-86.(WANGWeigang.Analysis on ionosphere delay error effect satellite navigation system error[J].Modern Navigation,2015,6(2):79-86.)
[3]焦文海,丁群,李建文,等.GNSS开放服务的监测评估[J].中国科学(物理学力学天文学),2011,41(5):521-527.(JIAO Wenhai,DING Qun,LI Jianwen,et al.Monitoring and assessment of GNSS open services[J].Scientia Sinica(Phys,Mech&Astron),2011,41(5):521-527.)
[4]张清华.GNSS监测评估理论与方法研究[J].测绘学报,2017,46(4):536.(ZHANG Qinghua.Researches on theory and method of GNSS monitor and assessment[J].Acta Geodaetica et Cartographica Sinica,2017,46(4):536.)
[5]KLOBUCHAR J A.Ionospheric time-delay algorithm for single-frequency GPS users[J].IEEE Transactions on Aerospace and Electronic Systems,1987,AES-23(3):325-331.
[6]WU Xiaoli,HU Xiaogong,WANG Gang,et al.Evaluation of COMPASS ionospheric model in GNSS positioning[J].Advances in Space Research,2013,51(6):959-968.
[7]European Commission.European GNSS(Galileo)open service:ionospheric correction algorithm for galileo single frequency users(issue1.2)[EB/OL].[2017-09-04].https:∥www.gsc-europa.eu/electronic-library/programme-reference-documents.
[8]张强,赵齐乐,章洪平,等.北斗卫星导航系统Klobuchar模型精度评估[J].武汉大学学报(信息科学版),2014,39(2):142-146.(ZHANG Qiang,ZHAO Qile,ZHANG Hongping,et al.Evaluation on the precision of Klobuchar model for BeiDou navigation satellite system[J].Geomatics and Information Science of Wuhan University,2014,39(2):142-146.)
[9]刘帅,贾小林.GNSS电离层模型改正精度评估与分析[J].空间科学学报,2016,36(3):297-304.(LIU Shuai,JIA Xiaolin.Correction accuracy evaluation and analysis on GNSS ionosphere model(in Chinese)[J].Chin JSpace Sci,2016,36(3):297-304.)
[10]陈秀德,贾小林,朱永兴.广播电离层模型性能评估及分析[J].导航定位学报,2017,5(1):18-23.(CHENXiude,JIA Xiaolin,ZHU Yongxing.Performance estimation and analysis on broadcast ionospheric model[J].Journal of Navigation and Positioning,2017,5(1):18-23.)
[11]李施佳,蔡昌盛,戴吾蛟,等.NeQuick2电离层改正模型的性能评估[J].测绘工程,2015,24(1):40-43.(LI Shijia,CAI Changsheng,DAI Wujiao,et al.Performance evaluation of NeQuick2ionosphere model[J].Engineering of Surveying and Mapping,2015,24(1):40-43.)
[12]王泽民,毕通,孙伟,等.GNSS广播电离层模型在极区的改正效果分析[J].极地研究,2016,28(2):235-242.(WANG Zemin,BI Tong,SUN Wei,et al.Analysis of global navigation satellite system broadcast ionospheric model correction in polar rigions[J].Chinese Journal of Polar Research,2016,28(2):235-242.)
[13]Stefan Schaer Astronomical Institute,University of Berne sschaer.How to use CODE’s global ionosphere maps[EB/OL].[2017-09-04].http:∥aiuws.unibe.ch/ionosphere/.
[14]SCHAER S,GURTNER W,FELTENS J.IONEX:the ionosphere map exchange format version 1[C]∥Proceedings of the IGS Analysis Center Workshop.Darmstadt,Germany:[s.n.],1998.
[15]薛军琛,宋淑丽,朱文耀.区域布网为主的全球电离层模型建立与分析[C]∥第三届中国卫星导航学术年会论文集.[出版地不详]:[出版者不详],2012:89-102.(XUE Junchen,SONG Shuli,ZHU Wenyao.Construction and analysis for global ionospheric model mainly based on regional network[C]∥Procceding of the 3th China Satellite Navigation Conference.[S.l.]:[s.n.],2012:89-102.)
[16]章红平.基于地基GPS的中国区域电离层监测与延迟改正研究[D].上海:中国科学院研究生院(上海天文台),2006.(ZHANG Hongping.Study on GPS based China regional ionosphere monitoring and ionospheric delay correction[D].Shanghai:Graduate University of Chinese Academy of Sciences(Shanghai Astronomical Observatory),2006.)
[17]DACH R,HUGENTOBLER U,FRIDEZ P.Bernese GPS Software Version 5.0[Z].Bern:Astronomical Institute,University of Berne,2007.
[18]李子申.GNSS/Compass电离层时延修正及TEC监测理论与方法研究[D].北京:中国科学院大学,2012.(LI Zishen.Study on the mitigation of ionospheric delay and the monitoring of global ionospheric TECbased on GNSS/Compass[D].Beijing:University of Chinese Academy of Sciences,2012.)
[19]LIU Libo,WAN Weixing,CHEN Yiding,et al.Solar activity effects of the ionosphere:a brief review[J].Chinese Science Bulletin,2011,56(12):1202-1211.
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