Inter-System Differencing between GPS and BDS for Medium-Baseline RTK Positioning

Wang Gao 1,2, Chengfa Gao 1, Shuguo Pan 3,*, Xiaolin Meng 2 and Yan Xia 3 1 School of Transportation, Southeast University, Nanjing 210096, China; [email protected] (W.G.); [email protected] (C.G.) 2 Nottingham Geospatial Institute, The University of Nottingham, NG7 2TU Nottingham, UK; [email protected] 3 School of Instrument Science and Engineering, Southeast University, Nanjing 210096, China; [email protected] * Correspondence: [email protected]