ALGORITHM OF USER STATION IN WADGPS

This paper introduces a positioning algorithm of user station in WADGPS. We select a trimble single frequency receiver SK8 which can track 8 satellites simultaneously. The receiver can be used for differential GPS applications. We design a special differential correction receiver and a DSP chip which integrates the process of user station positioning. The process not only decodes the message of SK8 and DGPS corrections, but also calculates the position and velocity as the output.