NCEP再分析资料计算对流层天顶延迟精度评价  

The Accuracy of ZTD in Belt and Road Region was Calculated by Reanalysis Data

作　　者：韩俊扬 毛健[1] 马振兴[1] Han Junyang;Mao Jian;Ma Zhenxing(Tianjin Normal University,Tianjin 300387,China)

机构地区：[1]天津师范大学,天津300387

出　　处：《科学技术创新》2022年第29期13-17,共5页Scientific and Technological Innovation

摘　　要：针对美国国家环境预报中心(NCEP)提供的FNL全球再分析资料计算对流层延迟估计适用性问题,基于“一带一路”区域84个IGS站点为参考,得出了相应的精度评价结果与时空特征分布特征分析。结果表明:再分析资料在“一带一路”区域对流层天顶延迟的平均偏差和均方根在时间分布中3-5月精度较高,在空间分布中Bias和RMSE都同时稳定在1~2 cm。本研究结果可为“一带一路”区域利用NCEP再分析资料提高对流层延迟时空分辨率和水汽反演精度提供参考。To evaluate the applicability of FNL global reanalysis data provided by NATIONAL Center for Environmental Prediction(NCEP) for tropospheric delay estimation,based on 84 IGS stations in the Belt and Road region as reference, obtained the corresponding accuracy evaluation results and analysis of spatio-temporal characteristics distribution characteristics. The results show that the mean deviation and root mean square of tropospheric zenith delay of reanalysis data in the "Belt and Road" region have high accuracy in time distribution from March to May,and the Bias and RMSE in space distribution are stable at 1~2cm at the same time. It is also pointed out that different interpolation algorithms are suitable for this accuracy evaluation. The results of this study can provide a reference for improving the temporal and spatial resolution of tropospheric delay and water vapor inversion accuracy in the Belt and Road region by using NCEP reanalysis data.

关 键 词：NCEP 对流层天顶延迟 精度评价 

分 类 号：P421.31[天文地球—大气科学及气象学]