| 454 | 26 | 82 |
| 下载次数 | 被引频次 | 阅读次数 |
主要介绍了GPS星间链路(星间链路是卫星导航系统实现自主运行的一项重要的关键技术)的工作模式,重点讨论了GPS星间链路数据的模拟方法。采用契比雪夫多项式拟合方法,获得对IGS(International GPS Service)公布的GPS精密星历加密到以1 s为间隔的数据。由信号接收时刻获得的两颗卫星间的距离作为初始值,反复迭代推算出发射信号的卫星发射信号的时刻,从而得到两颗卫星间的星间伪距观测值,再加上各项约束条件(如噪声,钟差等)后获得了两颗卫星间模拟的星间链路数据。
Abstract：The inter-satellite link(ISL) is one of key techniques in the autonomous operation of satellite navigation system.This article mainly describes the mode of GPS ISL and focuses on the simulation method of the GPS ISL data.The data from GPS precise ephemeris published by IGS is densified to a time interval of 1 s,by using Chebyshev polynomial fitting method.First,the distance between two satellites at the time of signal receiving is set as the initial value.Then the moment of signal transmitting for the transmitting satellite is calculated iteratively.Therefore the pseudo-range observation between two satellites can be obtained.Coupled with the constraint conditions(e.g.noise,clock offsets),the simulated inter-satellite link data are obtained finally.
[1]李孝强,杨文强.导航卫星系统自主导航技术及其发展趋势[J].中国航天,2005,3:33-36.
[2]杨宁虎,陈力.卫星导航系统星间链路分析[J].全球定位系统,2007,2:17-20.
[3]HOLMES J K,RAGHAVAN S.A Summary of the New GPS IIR2M and IIF Modernization Signals[C]//Vehicular TechnologyConference,2004 IEEE 60th,2004(6):4116-4126.
[4]ANDY W.Estimate of the GPS Block IIR AutoNav Clock Behavior[C]//Joint Meeting EFTF2IEEE IFCS,1999:279-282.
[5]郑晋军,林益明,陈忠贵,等.GPS星间链路技术及自主导航算法分析[J].航天器工程,2009,18(2):28-35.
[6]陈忠贵,帅平,曲广吉.卫星导航系统技术进展(上)[J].中国航天,2007,9:24-29.
[7]王慧君.GPS卫星导航系统的新发展[J].电光系统,2005,4:6-9.
[8]周宇昌,李孝强,曹桂兴.导航卫星有效载荷技术现状及发展趋势[J].空间电子技术,2003,3:9-21.
[9]LI Zhi-gang,YANG Xu-hai,AI Guo-xiang,et al.A New Method for Determination of Satellite Orbits by Transfer[J].Science inChina,2009,52(3):384-392.
[10]惠卫华,吴海涛,边玉敬.卫星星座时间同步中星间链路的设计和性能分析[J].时间频率学报,2006,29(1):19-26.
基本信息:
DOI：10.13875/j.issn.1674-0637.2010.01.008
中图分类号:P228.4
引用信息:
[1]刘亚琼,杨旭海.GPS星间链路及其数据的模拟方法研究[J].时间频率学报,2010,33(01):39-46.DOI:10.13875/j.issn.1674-0637.2010.01.008.
基金信息:
国家高技术研究发展计划(863计划)资助项目(2006AA12Z322);; 中国科学院知识创新工程重要方向资助项目(KJUX2-YW-T12);中国科学院西部之光联合学者资助项目(2007LH01)
2010-06-15
2010-06-15