Research on technology of precise point positioning in near mine point measurement

According that establishing near mine points can be a costly business and precise inconsistent using traditional methods,so an approach of using Precis e Point Positioning(PPP) combined with precise orbit and precise clock products to establish control points was presented by International GNSS Service(IGS).To deter mining the accuracy and convergence time of Precise Point Positioning(PPP),two observational stations data of International GNSS Service(IGS) and the real GPS data were dealt with and analyzed by using Bernese 5.0 and Canadian Spatial Reference System(CSRS) PPP online tool. The results indicated that the convergence time wa s about 30 min,and centimeter level accuracy was achieved.Then PPP was introduced in surveying 12 near mine points,and the coordinates were compared with that su rveyed by Continuous Operational Reference System-Real Time Kinematic(CORS-RTK),static relative positioning and traverse survey.The results showed that accuracy was better than 5cm.This study showed that static PPP had a good performance in surveying near mine points.