利用中国大陆地区7个IGS站2011年实测的高精度对流层天顶延迟(ZTD)数据对ERA-Interim资料计算ZTD的精度进行了评估。结果表明在中国地区ERA-Interim资料计算ZTD的年均偏差的绝对值BIAS和RMS分别优于1和2 cm,且无明显的季节变化。
In this study, the Zenith Tropospheric Delay ( ZTD) for ERA-Interim was assessed by ZTD from sev-en IGS sites over mainland China in 2011 .The results show that the mean yearly BIAS and RMS for the ERA-Interim ZTD are better than 1 cm and 2 cm respectively.Besides, there are no obvious seasonal characters.