Galileo IOV卫星广播星历精度评估
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摘要
介绍广播星历精度评估的基本原理与方法,在此基础上利用长达两年的广播星历数据分析比较Galileo现有IOV卫星的广播轨道精度、钟差精度以及整体精度SISRE的长期和短期变化趋势,结果表明,目前Galileo IOV卫星径向轨道精度优于0.5m,切向精度优于1.8m,法向精度优于1.5m,略优于切向,钟差精度优于5ns,SISRE优于1.3m。从星历精度的长期变化趋势来看,Galileo广播星历精度随系统发展有一定的改善。
The basic accuracy assessment theory and method of broadcast ephemeris are introduced firstly.Then this paper analyzes and compares the short-term and long-term trends of the broadcast ephemeris accuracy,clock bias accuracy and SISRE accuracy of Galileo existing IOV satellites with two-year-long broadcast ephemeris data based on the method.The results show that,now the accuracy of radial orbit of Galileo IOV satellites is better than 0.5m,the tangential one is better than 1.8mand the normal one is better than 1.5m which is better than tangential-direction slightly.Meanwhile,the RMS of clock bias is less than 5ns,and the accuracy of SISRE value is better than 1.3m.In addition,the long-term trend of Galileo broadcast ephemeris accuracy indicates that the accuracy of Galileo satellites broadcast ephemeris has been improved with the development of Galileo system.
The basic accuracy assessment theory and method of broadcast ephemeris are introduced firstly.Then this paper analyzes and compares the short-term and long-term trends of the broadcast ephemeris accuracy,clock bias accuracy and SISRE accuracy of Galileo existing IOV satellites with two-year-long broadcast ephemeris data based on the method.The results show that,now the accuracy of radial orbit of Galileo IOV satellites is better than 0.5m,the tangential one is better than 1.8mand the normal one is better than 1.5m which is better than tangential-direction slightly.Meanwhile,the RMS of clock bias is less than 5ns,and the accuracy of SISRE value is better than 1.3m.In addition,the long-term trend of Galileo broadcast ephemeris accuracy indicates that the accuracy of Galileo satellites broadcast ephemeris has been improved with the development of Galileo system.
引文
[1]罗小敏,蔡昌盛,戴吾蛟,等.Galileo IOV卫星实时轨道和钟差数据的精度评估[J].测绘通报,2014(6):1-4.
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[4]张耀文.GPS广播星历及其精度评估研究[D].西安:长安大学,2007.
[5]余文坤,戴吾蛟,蔡昌盛,等.GPS/GLONASS广播星历精度分析[J].工程勘察,2012(8):79-83.
[6]郭际明,孟祥广,李宗华,等.GLONASS卫星广播星历精度分析[J].大地测量与地球动力学,2011,31(1):68-71.
[7]陈永就.GNSS广播星历的精度评定[J].测绘与空间地理信息,2015,40(6):186-191.
[8]MONTENBRUCK O,STEIGENBERGER P,HAUSCHILD A.Broadcast versus precise ephemerides:a multi-GNSS perspective[J].GPS Solutions,2014,19(2):321-333.
[9]RODRIGUEZ L.Galileo IOV status and results.In:Proceedings of ION GNSS 2013,Nashville,TN,2013:3065-3093.
[10]HAUSCHILD A,MONTENBRUCK O.Kalman-filter-based GPS clock estimation for near real-time positioning[J].GPS solutions,2009,13(3):173-182.
[11]GENDT G,ALTAMIMI Z,DACH R,et al.GGSP:realisation and maintenance of the Galileo terrestrial reference frame[J].Advances in Space Research,2011,47(2):174-185.
[12]罗小敏.Galileo在轨验证卫星单点定位技术研究[D].长沙:中南大学,2014.
[13]MALYS S,LAREZOS M,GOTTSCHALK S,et al.The GPS accuracy improvement initiative[C].Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation(ION GPS 1997).1997:375-384.
[14]WARREN D,RAQUET J.Broadcastvs Precise GPS Ephemerides:a Historical Pespective[J].GPS Solutions,2003(7):151-156.
[15]STEIGENBERGER P,HUGENTOBLER U,LOYER S,et al.Galileo orbit and clock quality of the IGS Multi-GNSS Experiment[J].Advances in Space Research,2014:8-9.
[2]李征航,丁文武,李昭.GPS广播星历的轨道误差分析[J].大地测量与地球动力学,2008,28(1):50-54.
[3]郭斐,张小红,李星星,等.GPS系列卫星广播星历轨道和钟的精度分析[J].武汉大学学报(信息科学版),2009,34(5):589-592.
[4]张耀文.GPS广播星历及其精度评估研究[D].西安:长安大学,2007.
[5]余文坤,戴吾蛟,蔡昌盛,等.GPS/GLONASS广播星历精度分析[J].工程勘察,2012(8):79-83.
[6]郭际明,孟祥广,李宗华,等.GLONASS卫星广播星历精度分析[J].大地测量与地球动力学,2011,31(1):68-71.
[7]陈永就.GNSS广播星历的精度评定[J].测绘与空间地理信息,2015,40(6):186-191.
[8]MONTENBRUCK O,STEIGENBERGER P,HAUSCHILD A.Broadcast versus precise ephemerides:a multi-GNSS perspective[J].GPS Solutions,2014,19(2):321-333.
[9]RODRIGUEZ L.Galileo IOV status and results.In:Proceedings of ION GNSS 2013,Nashville,TN,2013:3065-3093.
[10]HAUSCHILD A,MONTENBRUCK O.Kalman-filter-based GPS clock estimation for near real-time positioning[J].GPS solutions,2009,13(3):173-182.
[11]GENDT G,ALTAMIMI Z,DACH R,et al.GGSP:realisation and maintenance of the Galileo terrestrial reference frame[J].Advances in Space Research,2011,47(2):174-185.
[12]罗小敏.Galileo在轨验证卫星单点定位技术研究[D].长沙:中南大学,2014.
[13]MALYS S,LAREZOS M,GOTTSCHALK S,et al.The GPS accuracy improvement initiative[C].Proceedings of the 10th International Technical Meeting of the Satellite Division of The Institute of Navigation(ION GPS 1997).1997:375-384.
[14]WARREN D,RAQUET J.Broadcastvs Precise GPS Ephemerides:a Historical Pespective[J].GPS Solutions,2003(7):151-156.
[15]STEIGENBERGER P,HUGENTOBLER U,LOYER S,et al.Galileo orbit and clock quality of the IGS Multi-GNSS Experiment[J].Advances in Space Research,2014:8-9.