The carrier-multipath observable: a new carrier-phase multipath mitigation technique
The carrier-multipath observable: a new carrier-phase multipath mitigation technique
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DOI：
10.1007/s10291-014-0366-8
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发表时间：
2015-01-01
期刊：
影响因子：
4.9
通讯作者：
Ochieng, Washington
中科院分区：
文献类型：
--
作者：
Moradi, Ramin;Schuster, Wolfgang;Ochieng, Washington
建模和减轻载波相位多径误差仍然是使用全球导航卫星系统进行高精度定位的重大挑战。多路径错误依赖于操作环境，因此不能通过差分技术来减轻。当基于两个或多个频率测量的线性组合的可观测值被表述时，多径的影响会被强化。我们开发了一种新的载波相位多径误差观测值，该观测值隔离了宽车道（WL）等线性观测值组合的频间载波相位多径误差。基于不同基线长度的实时运动学定位结果表明，通过使用新的载波相位多径误差观测值来校正WL观测值，实现初始模糊度分辨率的时间显著减少了14%至47%。
Modeling and mitigating carrier-phase multipath errors continue to be a significant challenge for high-accuracy positioning using global navigation satellite systems. The multipath error is dependent on the operational environment and therefore cannot be mitigated by differencing techniques. The effect of multipath is accentuated when observables based on linear combinations of measurements from two or more frequencies are formulated. We develop a new carrier-phase multipath error observable that isolates the inter-frequency carrier-phase multipath error for linear combinations of observables, such as wide-lane (WL). Real-time kinematic positioning results from varying baseline lengths show that a significant reduction in between 14 and 47 % in the time to initial ambiguity resolution are achieved by correcting the WL observable using the new carrier-phase multipath error observable.