Research on Three-Dimensional Water Vapor Tomography Using
GPS/GLONASS PPP Method
1 Key Lab of Mine Spatial Information Technology, NASMG,Henan Polytechnic University,
Abstract 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 6 d were 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.
Key words ：
GPS
GLONASS
COSMIC
precise point positioning
water vapor
Received: 16 January 2014
Published: 06 February 2015
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