The novel method of data processing in position-differential system of the satellite navigation

In position-differential system of the satellite navigation, the position corrections are needed to be broadcast to user receiver for position correcting in real time. But there is a delay when the position corrections are calculated from reference receiver and then transmitted to the user receiver. In this paper, the authors put forwards a novel method, the recursive constraint least square, to solve this problem. There are periodical variations in positioning results of the reference receiver and user receiver from analysis of their results. Then the selection of correction quantities at each prediction will affect the differential results, and 30 correction quantities are selected by analyzing. The availability and efficiency of this method have been proved with practical experiments