›› 2016, Vol. 36 ›› Issue (5): 25-.doi: 10.16708/j.cnki.1000-758X.2016.0054

• 研究探讨 • 上一篇    下一篇

RTCA协议下北斗完好性降效参数算法设计及检验

王源昕, 曹月玲, 胡小工, 黄勇, 唐成盼   

  1. 1中国科学院上海天文台,上海200030
    2中国科学院大学,北京100049
  • 收稿日期:2015-12-25 修回日期:2016-03-25 出版日期:2016-10-25 发布日期:2016-06-30

ThealgorithmandvalidationofBeiDousystem

WANG  Yuan-Xin, CAO  Yue-Ling, HU  Xiao-Gong, HUANG  Yong, TANG  Cheng-Pan   

  1. 1ShanghaiAstronomicalObservatory,ChineseAcademyofSciences,Shanghai200030,China
    2UniversityofChineseAcademyofScience,Beijing100049,China
  • Received:2015-12-25 Revised:2016-03-25 Online:2016-10-25 Published:2016-06-30

摘要: 目前我国北斗导航增强系统的完好性参数设计缺少针对差分信息有效性的降效参数设计,不满足航空无线电委员会(RTCA)提出的接口协议,无法同国际其他GNSS星基增强系统相兼容。根据RTCA接口协议,针对我国卫星导航系统的完好性降效参数处理算法进行了研究,利用北斗实测数据分析了完好性降效参数对用户增强服务的影响,验证了算法的有效性。结果表明,正常情况下,北斗导航系统增强服务三维定位精度可达到113m。当用户丢失部分差分改正信息时,定位精度约144m,精度下降约274%,利用完好性降效参数对过期差分信息进行降效处理,优化定位权阵,可将定位精度提高至117m,达到正常增强服务水平。

关键词: 星基增强系统, 航空无线电委员会协议, 完好性, 降效参数, 北斗, 定位

Abstract: Currently,thedesignofintegrityparametersforthesatellitebasedaugmentationsystemofBDSislackofdegradationparametersforthedifferentialinformation′savailability,andcan′tsatisfytheRTCAprotocol.SothesatellitebasedaugmentationsystemofBDSisnotcompatibletotheotherinternationalsatellitebasedaugmentationsystemofGNSS.TheintegritydegradationparametersofBDSweredesignedaccordingtotheRTCAprotocol,andtheeffectontheuserpositioningwasanalyzedbyusingtheBDSmeasureddata.Basedonthese,theeffectivenessofthisalgorithmwasdemonstrated.Theresultsshowthat,thelocationprecisionoftheaugmentationsystemforBDSreaches113m.However,iftheuserfailedtoreceivesomedifferentialcorrection,thepositioningprecisionreaches144m,decreasesby274%approximately.Inthissituation,byoptimizingpositionmatrixwiththeintegrityparameterstothepastdifferentialmessage,thepositioningprecisionwillincreaseto117m,sotheauthorizedservicewillrecover.

Key words: satellitebasedaugmentationsystem, RadioTechnicalCommissionforAeronauticsprotocol, integrity, degredation, BeiDounavigationsystem;positioning