single difference phase observation 单差相位观测 在卫星定位中，两站对同一卫星单程相位观测值之差。
利用单频GPS接收机进行实时动态差分时，相位观测值整周模糊度的实时确定比较困难；
When realizing kinetic GPS differenced positioning using single frequency GPS receiver, the decision of integer ambiguity of phase observation is rather difficult.
在分析似单差模型的基础上，提出了识别载波相位观测值中小于半周的粗差的方法。
On the basis of analyzing the similar single-difference model, the method of identifying the outliers, which is in carrier phase observations and less than half a cycle, is put forward.
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