GPS/GLONASS组合精密单点定位技术在三维水汽层析中的应用

Research on Three-Dimensional Water Vapor Tomography Using GPS/GLONASS PPP Method

提出利用GPS/GLONASS组合精密单点定位反演水汽的三维分布信息,并选用中国香港地区的12个CORS站6d的观测数据以及相应的COSMIC掩星产品共同进行试算。结果表明,与GPS精密单点定位相比,组合GPS/CLONASS精密单点定位反演水汽三维分布时,穿越层析网格的数目提高18%,精度提高约10%。

A combined GPS/GLONASS precise point positioning（PPP）approach is used to obtain the three-dimensional distribution of atmospheric water vapor.To verify the effectiveness of the combined GPS/GLONASS PPP,and GPS,datasets at 12 stations on 6dwere collected at the time when COSMIC RO events occurred in or around Hong Kong.The test results indicate that the number of the voxels from GPS/GLONASS PPP that are passed by the satellite rays increased by 18%,and the water vapor accuracy from GPS/GLONASS PPP is 10% higher than with the GPS PPP method.