Three kinds of models of carrier phaseobservation value linear combination are deduced such as wide lane, narrow lane and free ionosphere.
推导了三种载波相位观测量线性组合的模型：宽巷组合、窄巷组合和无电离层延迟的组合。
2
When realizing kinetic GPS differenced positioning using single frequency GPS receiver, the decision of integer ambiguity of phaseobservation is rather difficult.
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；
3
The dual-frequency carrier phaseobservation equation is built and ionosphere-free predigested, the estimate formula of zenith wet delay is deduced with least square method.