A correction of pseudorange in single point positioning of GLONASS

Positioning calculation cannot be done or accuracy will be worse in the place where a lot of obstacles. Then, we can increase the number of the visible satellites by using GPS(Global Positioning System) and GLONASS(Global Navigation Satellite System). But because of the different characteristics of these systems, positioning error occurs when they are used at the same time. In this research, we study single point positioning of GLONASS as a pioneering study of using them at the same time. We revised pseudo range by previous clock correction of receiver and we have succeeded correct the error.