Single-epoch RTK performance assessment of tightly combined BDS-2 and newly complete BDS-3

Abstract The BeiDou global navigation satellite system (BDS-3) constellation deployment has been completed on June 23, 2020, with a full comprising 30 satellites. In this study, we present the performance assessment of single-epoch Real-Time Kinematic (RTK) positioning tightly combined regional (BDS-2) and BDS-3. We first investigate whether code phase Differential Inter-System Biases (DISBs) exist between legacy B1I/B3I signals BDS-3/BDS-2. It is discovered that DISBs are in fact about zero for baselines same or different receiver types at their endpoints. These results imply BDS-3 BDS-2 fully interoperable can be regarded as one without additional when used precise relative positioning. Then preliminarily evaluate short baseline RTK newly evaluated through ambiguity resolution success rate, dilution precision, well accuracy kinematic static modes using datasets collected Wuhan. Experimental demonstrate current only solutions deliver comparable much better respect to solutions. Moreover, improved BDS-3/BDS-2, particularly challenging harsh conditions. single-frequency BDS-3/BDS-2 solution could an rate 96.9% even elevation cut-off angle 40°, indicating achieve superior Asia–Pacific region. Meanwhile, three-dimensional (East/North/Up) (0.52 cm/0.39 cm/2.14 cm) test significantly than (0.85 cm/1.02 cm/3.01 due geometry constellation. provide 0.52 cm, 0.22 1.80 respectively.