An enhanced calibration method of GLONASS inter-channel bias for GNSS RTK

作者：Al Shaery A^*; Zhang S; Rizos C

来源：GPS Solutions, 2013, 17(2): 165-173.

DOI：10.1007/s10291-012-0269-5

• GPS
• GLONASS
• Inter-channel bias
• RTK

A user of heterogeneous GPS and GLONASS receiver pairs in differential positioning mode will experience ambiguity fixing challenges due to the presence of inter-channel biases. These biases cannot be canceled by differencing GLONASS observations, whether pseudorange or carrier phase. Fortunately, pre-calibration of GLONASS pseudorange and carrier phase observations can make ambiguity fixing for GPS/GLONASS positioning much easier. We propose an effective algorithm that transforms an RTK (real-time kinematic) solution in a mixed receiver baseline from a float to a fixed ambiguity solution. Carrier phase and code inter-channel biases are estimated from a zero baseline. Then, GLONASS both carrier phase and code observations are corrected accordingly. The results show that a mixed baseline can be transformed from a float (100 %) to a fixed (more than 92 %) solution.

• 出版日期2013-4