Centimeter‐Level, Real‐Time Kinematic Positioning with GPS+GLONASS C/A Receivers

ABSTRACT This paper describes the main features of a new algorithm developed for a real‐time kinematic (RTK) engine to process GPS+GLONASS C/A‐code and carrier phase differential data. The goal of the development was to implement the algorithm in low‐cost receivers that are capable of tracking the signals of both constellations. The test results, also presented, show that combined RTK processing ensures very fast (often instant) on‐the‐fly (OTF) ambiguity resolution (AR) and centimeter kinematic accuracy for short baselines under an open sky. Under a partly blocked sky or in a severe environment (urban areas, deep mines, under trees) where GPS‐only RTK often is not able to work, GPS+GLONASS RTK still ensures reliable decimeter‐and often centimeter‐level real‐time accuracy. The data was collected using Ashtech GG24 receivers with the RTK option installed.