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- 2016
GLONASS辅助动态GPS精密单点定位模糊度固定
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Abstract:
与模糊度为浮点解的精密单点定位（precise point positioning，PPP）相比，PPP模糊度固定技术具有更快的收敛速度和更好的定位精度。但当GPS卫星数目少或几何构形不好时，需要较长时间实现GPS PPP模糊度的首次固定，通过加入GLONASS卫星可以有效缩短首次固定时间。推导了基于整数相位钟法的GPS/GLONASS组合PPP模型并进行了大量实验解算。40组静态模拟动态实验表明，GPS PPP模糊度首次固定平均需要50.2 min，但在GLONASS辅助下只需25.7 min，减少了48.8%，而且定位精度也有提高。车载动态实验表明，由于受观测条件限制，GPS PPP模糊度难以固定，但在GLONASS辅助下仍能实现GPS PPP模糊度固定
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