中文说明：
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。
English Description：
GPS measurement data processing can be divided into two stages: baseline solution and network adjustment. Baseline solution is to use the carrier phase observation received by GPS receiver as the basic observation value to carry out differential processing.