GLONASS接收机频间偏差在短基线GLONASS/BDS联合RTK中的修正方法

A Calibration Method of GLONASS Inter-Channel Bias for GLONASS/BDS RTK Based on Short Baseline

采用不同的接收机对进行GLONASS/BDS联合RTK定位时,为提高模糊度固定的成功率,需要对GLONASS观测量的频间偏差进行修正。分别就载波相位观测量和伪距观测量频间偏差的修正方法进行研究,并采用短基线数据对所提修正方法的可行性进行验证。结果表明,该方法能有效保证RTK解算结果的可靠性。

Due to the presence of inter-channel bias, users of heterogeneous BDS and GLONASS receiver pairs in differential positioning mode will experience ambiguity fixing challenges. In order to improve the success rate of ambiguity resolution, the bias needs to be corrected. This paper proposes an effective algorithm that can estimate carrier phase and code inter-channel biases by a zero baseline. Then, both GLONASS carrier phase and code observations are corrected accordingly in short baseline RTK positioning. The results show that the success rate of ambiguity resolution can be improved significantly.