Abstract:By analyzing the multipath (MP) combination of BDS-2 satellite, the code bias of BDS-2 satellites is confirmed as elevation, satellite, and frequency dependent. For BDS-3 satellites, the MP combination is calculated and the elevation-dependent model is developed for each satellite on different frequencies by the polynomial fitting method. The observation data of BDS-2 satellites are from IGS station JFNG, while the data of BDS-3 satellites are from self-test data SGG0. The results of BDS-3 satellites show that the code bias is ignorable.