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《Geospatial Information》 2018-06
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Study on Precipitible Water Vapor Inversion Based on PPP and NCEP Reanalysis Data

ZENG Xianmin;  
We laid emphasis on the phenomenon that lack of meteorological data when precipitible water vapor(PWV) inversion of the station based on PPP, and proposed a new interpolation method based on NCEP reanalysis data. We chose 4 IGS stations, which all supplied meteorological file and compared the meteorological data through interpolation with the observed meteorological data. Taking the PWV which inversed by observed meteorological data as true value, we compared true value and the PWV, which inversed without meteorological data and with interpolation data, and evaluated the accuracy. The results show that the mean RMS of the difference between interpolation pressure and observed pressure is 1.39 mbar. The mean RMS of the difference between interpolation temperature and observed pressure is 3.83 ℃.The mean RMS of the difference between PWV which inversed without meteorological data and true value is 2.34 mm, while PWV which inversed with interpolation meteorological data and true value is only 0.37 mm, which means the interpolation method can improve the accuracy obviously and this method can be a very useful supplement when lack of meteorological data.
【CateGory Index】: P407
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