辛洁,陈茜,郭睿,王冬霞,李晓杰,时鑫

• 1:32021部队
• 2:北京卫星导航中心

摘要(Abstract)：

针对北斗二号系统和北斗三号系统导航电文播发现状,该文从导航电文结构、导航电文内容和播发方式等方面对二者间的差异进行了比对分析,着重比较分析了卫星星历参数、卫星钟差钟差、数据有效性标识、设备群延迟参数、设备延迟参数、电离层改正、完好性等导航电文参数,并结合导航电文实际应用,给出了广播星历拟合精度、卫星钟差拟合精度、系统定位精度评估结果。结果表明:北斗卫星广播星历拟合残差为厘米级,18参数广播星历拟合精度略优于16参数的拟合精度;加入星间链路钟差后,MEO卫星的钟差测定精度虽与仅星地观测的钟差精度基本相当,但明显提高了卫星钟差预报精度;北斗二号与北斗三号联合定位精度较仅北斗二号卫星定位精度有所提升。

关键词(KeyWords)： 北斗卫星导航系统;导航电文;星间链路;广播星历

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(61603397,41204022,41374038);; 大地测量与地球动力学国家重点实验室开放 基金资助项目(SKLGED2017-3-3-E)

作者(Author): 辛洁,陈茜,郭睿,王冬霞,李晓杰,时鑫

DOI: 10.16251/j.cnki.1009-2307.2020.04.006

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