摘要: |
多模导航定位较高的定位条件(需可见卫星总数大于5 颗) 限制了其在城市等卫星遮
挡较严重的地区充分发挥多系统的优势。基于Kalman 滤波, 提出一种将多系统接收机钟差融合
为一个系统接收机钟差的多模伪距单点定位数据处理算法, 解决了多模导航定位在可见卫星数
少于6 颗大于3 颗时无法定位的情况。分析了GPS、北斗和GLONASS 三系统一天的观测数据,
结果表明, 多系统接收机钟差融合后只需可见卫星总数大于3 颗即可进行多模伪距单点定位。 |
关键词: 多模 伪距单点定位 Kalman 滤波 接收机钟差 数据处理 |
DOI: |
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基金项目: |
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Multi⁃mode Single Point Positioning Based on Processingof Integration Multi⁃system Clock Offset |
YUAN Bing,YE Shi⁃rong,BAO Li⁃gui |
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Abstract: |
The relatively high condition of multi⁃mode navigation localization, in which the number of visible satellites must
be more than five, confines its advantages of multi⁃system in cities or other places, where visible satellites would be kept
out seriously. This paper proposed a data processing algorithm of multi⁃mode single point positioning, which fused multi⁃
system clock offset to single⁃system clock offset based on Kalman filter. This algorithm solved the problem that multi⁃mode
navigation localization would not be converged when the number of visible satellites is less than six, but more than three.
Observation data of GPS, COMPASS and GLONASS in one day has been analyzed, which can come to a conclusion that
when the number of visible satellites is more than three, multi⁃mode single point positioning can be converged if multi⁃sys⁃
tem clock offset is integrated. |
Key words: Multi⁃mode Single point positioning Kalman filter Receiver clock offset Data processing |