select evolution with distance of the location of the current point difference, that is, if the current points for the I, the evolution of phase points can only be

GPS测量数据处理可分为基线解算和网平差两个阶段，基线解算就是利用ＧＰＳ接收机接收到的 载波相位观测值做为基本观测值，对其进行差分处理。-GPS data processing can be classified as the baseline solution and flat screen two phase difference, baseline solution is the use of GPS receivers to carrier phase observation value