2013•Cehui kexueRequires access
Influence of satellite ephemeris on estimation of zenith tropospheric delay in precise point positioning
Aigong Xu
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Abstract
In order to analyze the influence of different kinds of satellite ephemeris products on the estimation of zenith tropospheric delay in precise point positioning,different satellite ephemeris products were tested respectively in static to estimate zenith tropospheric delays in the paper,which were compared with the products of IGS zenith tropospheric delay then.The results showed that the zenith tropospheric delay estimation accuracy with final ephemeris is consistent with rapid ephemeris and ultra-rapid ephemeris(observed half).The mean RMS values were 4.5mm,4.3mm and 4.6mm,respectively.While,the mean RMS value of zenith tropospheric delay with ultra-rapid(predicted half) ephemeris was 6.3mm,which is slightly lower.