| 摘要: |
| 通过对比北斗卫星导航系统(BeiDou Navigation Satellite System，BDS)广播星历与事后精密星历，提取了轨道和卫星时钟误差。基于北斗轨道误差及北斗卫星时钟误差统计特征分析，构建区别于全球定位系统(Global Positioning System，GPS)的BDS空间信号用户测距误差(Signal-In-Space User Range Error，SISRE)描述方法，对BDS广播星历中用户测距精度(User Range Accuracy，URA)进行了验证。6个月的北斗数据测试结果表明，北斗GEO、IGSO和MEO卫星的URA分别为3.0m、1.9m和1.6m。 |
| 关键词: SISE 轨道误差 卫星时钟误差 URA 北斗卫星导航系统 |
| DOI： |
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| 基金项目:国家自然科学基金重点项目(61633008)；国家自然科学基金面上项目（61773132,61803115）；工信部《第七代超深水钻井平台（船）》创新专项；黑龙江省杰青项目（JC2018019）；中央高校基金基本科研业务费项目（HEUCFP201768） |
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| Study on Error Statistical Characterization and Description Method of BDS Signal-in-Space |
| FENG Shuai,LI Liang,CHENG Chun,LIU Yuan-yuan |
| (School of Automation, Harbin Engineering University，Harbin 150001， China) |
| Abstract: |
| Satellite orbit error and satellite clock errors were extracted by comparing the BeiDou navigation satellite system (BDS) broadcast ephemeris with the post-event precise ephemeris. Based on the statistical characterization of BDS orbit and clock error, a signal-in-space user range error (SISRE) description method different from GPS for BDS space signals is constructed to verify the user range accuracy (URA) in BDS broadcast ephemeris. The 6-month BeiDou data test results show that the URA of BeiDou GEO, IGSO and MEO satellites are 3.0m, 1.9m and 1.6m respectively. |
| Key words: SISE Orbit error Satellite clock error URA BDS |
