Abstract:In this paper, in order to study the influence of elevation masking angle and GNSS systems integration on PPP precision, we use the data from partial MGEX stations of 10 d are dealt with the PPP method of 24 h respectively. We analyze the number of visible satellites and the positioning precision of single GPS, BDS, GLONASS, double systems integration of GPS/BDS, GPS/GLONASS, GLONASS/BDS, and triple systems integration of GPS/GLONASS/BDS, under different elevation masking angle from 5° to 55°. The results show that the elevation masking angle should be set to under 30° in the single system, under 40° in the double systems, and under 55° in the triple systems. The optimal elevation masking angle of all system integration is from 7°
to 15°. When the elevation masking angle is less than 40°, the highest positioning precision is GPS/GLONASS/BDS and the lowest is BDS. When the elevation masking angle is more than 40°, it mainly depends on BDS to locate, and the positioning precision of all the system combinations is roughly equal. Moreover, as the elevation masking angle increases, the influence of systems integration on the PPP precision is gradually reduced.
LI Fangchao,WANG Hao,GAO Jingxiang et al. Influence of Elevation Masking Angle and System Integration on GNSS PPP Precision[J]. jgg, 2017, 37(11): 1150-1155.