摘要
GPS positioning precision is affected by various error sources, and traditional combinations of GPS carrier phase observations have their own limitations such as the wide-lane, the narrow-lane and the ionospheric-free combinations. To obtain the optimal positioning precision, a new linear combination method is addressed through the variance-covariance （VCV） of the GPS multi-frequency carrier phase combination equations, and the impact of the positioning precision is analyzed with the changing of the observation errors deduced by the law of error propagation. For the high precision positioning with only one carrier phase combination, the optimal combination method is deduced and further validated by an example of a baseline resolution with 60 km length. The result indicates that this method is the simplest, and the positioning precision is the best. Therefore, it is useful for long baseline quick positioning for different precision requirements in various distances.
放精确的 GPS 被 GPS 搬运人阶段观察的各种各样的错误来源，和传统的联合影响有他们的自己的限制例如宽小巷，狭窄小巷并且 ionospheric 免费的联合。获得最佳的放精确，一个新线性组合方法通过放的精确的 GPS 多频率搬运人阶段联合方程，和影响的变化协变性(VCV ) 被探讨与变化误差传播定律推出的观察错误被分析。为与一仅仅搬运人阶段联合放的高精确，最佳的联合方法被基线分辨率的一个例子与 60 km 长度推出并且进一步验证了。结果显示这个方法最简单，并且放的精确是最好。因此，在各种各样的远处为不同精确要求放，快为长基线是有用的。
基金
Supported by the Key Laboratory of Geological Hazards on Three Gorges Reservoir Area,Ministry of Education, China(No.2006KDZ05).
