摘要
针对利用传统单一种类卫星观测量进行广播星历A1型故障监测时,存在观测噪声大或模糊度解算复杂等问题,提出1种顾及参数灵敏度的北斗卫星导航系统(BDS)广播星历A1型故障完好性监测方法:联合伪距和载波相位观测量计算轨道误差;并与基于广播星历参数变化灵敏度分析的位置误差函数结合,根据系统的完好性风险要求,估算最小可检测误差;然后与检测门限比较,完成广播星历A1型故障监测。实验结果表明:无星历故障条件下,该方法计算的最小可检测误差均小于满足完好性风险要求的检测门限;而在故障发生时,最小可检测误差超出检测门限,能有效实现BDS广播星历A1型故障监测。
Aiming at the problems of large observation noises and complicated ambiguity resolution in using the traditional single-type satellite observation method to mornitor type A1 fault of broadcast ephemeris,the paper proposed a method of type A1 fault integrity monitoring for BeiDou navigation satellite System(BDS)broadcast ephemeris based on parameter sensitivity:the orbit errors were calculated by combining pseudo-range and carrier phase measurements;and according to the integrity risk requirement of the system,the minimum detectable error was estimated by integrating with the position error function based on the sensitivity analysis of broadcast ephemeris parameter change;then the detection threshold was compared for realizing type A1 fault integrity monitoring.Experimental result showed that:in the case of no ephemeris fault,the minimum detectable error calculated by the proposed method would be smaller than the detection threshold that meets the integrity risk requirement;while when the fault occurs,the minimum detectable error would exceed the detection threshold,indicating the feasibility of the method for BDS.
作者
刘媛媛
李亮
李慧
程春
LIU Yuanyuan;LI Liang;LI Hui;CHENG Chun(College of Intelligent System Science and Engineering,Harbin Engineering University,Harbin 150001,China)
出处
《导航定位学报》
CSCD
2021年第1期31-37,60,共8页
Journal of Navigation and Positioning
基金
国家自然科学基金项目(61773132,61633008,61803115)
黑龙江省杰出青年基金项目(JC2018019)
黑龙江省重点实验室开放基金重点课题项目(HKL-2020-Z01)
青岛市博士后应用研究项目(QDBSHYYYJXM20200101)。
关键词
北斗卫星导航系统
星历故障监测
参数灵敏度
最小可检测误差
完好性
BeiDou navigation satellite system
ephemeris fault monitoring
parameter sensitivity
minimum detectable error
integrity
