An optimal GPS data processing technique for precise positioning
An optimal GPS data processing technique for precise positioning
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DOI：
10.1109/36.210455
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发表时间：
1993
期刊：
影响因子：
--
通讯作者：
Sien-Chong Wu;W. Melbourne
中科院分区：
文献类型：
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作者：
Sien-Chong Wu;W. Melbourne
以封闭形式导出了用于将双频全球定位系统（GPS）伪距和载波相位数据流最佳地组合成单个数据流的数学公式。数据组合将参数估计过滤过程中的数据量和计算时间减少了四倍，同时保留了精确定位的全部数据强度。所得的单个数据流是载波相位测量的数据流，数据噪声和偏差不确定性均严格定义。利用这个数学公式，可以通过简单的数值计算有效地形成最佳组合的 GPS 测量的单流。在可行的情况下，由于保留了完整的数据强度和最佳组合的数据以及由此产生的用于解决模糊度的更长波长，所以在可行的情况下，载波相位模糊度分辨率得到了加强。 >
A mathematical formula for optimally combining dual-frequency Global Positioning System (GPS) pseudorange and carrier phase data streams into a single data stream is derived in closed form. The data combination reduces the data volume and computing time in the filtering process for parameter estimation by a factor of four while preserving the full data strength for precise positioning. The resulting single data stream is that of carrier phase measurements with both data noise and bias uncertainty strictly defined. With this mathematical formula the single stream of optimally combined GPS measurements can be efficiently formed by simple numerical calculations. Carrier phase ambiguity resolution, when feasible, is strengthened due to the preserved full data strength with the optimally combined data and the resulting longer wavelength for the ambiguity to be resolved. >