黄海海域FY4A卫星温湿廓线适用性分析

Applicability Analysis of FY4A Satellite Temperature and Humidity Profiles in the Yellow Sea

为了解FY4A卫星数据产品用于大气波导研究的可行性,利用2019年1月至3月FY4A卫星温度及比湿数据与岸基探空站采集的温湿廓线数据进行对比分析,从偏差、均方根误差等方面评估了二者数据间的差异。结果显示:在温度数据上,FY4A卫星温度数据与探空数据相比,偏差的均值区间为-2.35℃~1.35℃,均方根误差区间为2.11℃~4.73℃;在比湿数据对比上,FY4A卫星数据与探空数据相比,偏差的均值区间为-0.02g/kg~0.35g/kg,均方根误差区间为0.31g/kg~0.51g/kg;大气折射率偏差的均值区间为0.48N~5.50N,均方根误差区间为2.75N~7.14N。

To investigate the feasibility of FY4A satellite data products whether can be applied for atmospheric duct research,the FY4A satellite temperature and specific humidity data are analyzed according to the temperature and humidity profile data collected by shore-based sounding stations,meanwhile,the differences between the two data are evaluated in terms of mean value,root mean square error,etc.The results indicate that the average deviation is-2.35℃~1.35℃,and the root mean square error is 2.11℃~4.73℃for temperature.For the specific humidity,the average deviation is-0.02g/kg~0.35g/kg,and the root mean square error is 0.30g/kg~0.51g/kg.For the refractivity,the average deviation is 0.48N~5.50N,and the root mean square error is 2.75N~6.80N.