摘要
以全球IGS参考站2016年的ZTD资料为参考值,利用积分方法和ECMWF再分析资料,计算得到均匀分布在全球的133个参考站的ZTD,并对其精度进行了评估。研究结果表明:①利用ECMWF再分析资料计算的ZTD的Bias和RMS分别为3.4 mm和17.0 mm,优于NCEP再分析资料;②高纬度地区ZTD的Bias一般比低纬度地区小,高温地区ZTD的Bias比低温地区大,相对湿度变化大的地区ZTD的Bias比相对湿度变化小的地区大。
In this article,taking the ZTD data of 2016 IGS reference stations in the world as reference values,we used integration method and ECMWF reanalysis data to calculate ZTD for 133 reference stations worldwide,and evaluated their accuracy.The results show that(1)the Bias and RMS of ZTD calculated by ECMWF reanalysis data are 3.4 mm and 17.0 mm respectively,which are superior to NCEP reanalysis data.(2)In general,the residuals of ZTD in high latitude areas are smaller than those in low latitude areas,the residuals of ZTD in high temperature areas are larger than those in low temperature areas,and the residuals of ZTD in areas with large relative humidity changes are larger than those in areas where relative humidity changes are small.
出处
《地理空间信息》
2020年第5期43-45,60,I0005,共5页
Geospatial Information
