2014•Cehui kexueRequires access
Influence of IGS precise ephemeris and clock error on zenith tropospheric delay precision
Y Chen
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Abstract
To study the influence of IGS precise ephemeris and clock error on zenith tropospheric delay precision,by taking the data obtained from IGS stations in Beijing,Shanghai,Lhasa and other three cities in China from 7to 10 April 2013as test data,the values of Zenith Tropospheric Delay(ZTD)were calculated with GPSTools,and compared with the IGS tropospheric delay products.Experimental results showed that the value of ZTD calculated by IGS precise orbits was equivalent to that of IGS,and the average RMS was smaller than 5mm;there was 2cm~3cm error between the value of ZTD calculated by IGS ultra-rapid clock error prediction and that provided by IGS server,and the average RMS was larger than 1cm.