The New Generation GNSS Single-frequency RTK Positioning with High Cut-off Elevation Angles

With the global coverage processing of BeiDou (BDS) System, 21 BDS-III satellites and five BDS-III experimental have been launched. Therefore, It is important to evaluate the performance of these new satellites and to demonstrate the capability of multi-constellation integrateing new satellites. To this end, we will investigate the Real Time Kinetic (RTK) performance of new generation Global Navigation Satellite System (GNSS) on single-frequency and low-cost u-blox receiver. In this paper, We focus on single-frequency RTK positioning using four Code Division Multiple Access (CDMA) systems in the short baseline scenario. We use real data collected in Beijing to analysis the positioning performance of the combined BDS-II, BDS-III, GPS, QZSS and Galileo systems under different cut-off elevation angles ranging from 10° to 50°. The well-known LAMBDA method has been used for ambiguity resolution and empirical ambiguity success rate which shows the performace of RTK is evaluated by ambiguity dilution of precision (ADOP). It will be shown that compared to the single BDS/GPS system, the aggrandized strength of the new generation combined system improved ambiguity resolution performance as well as positioning robustness.