风云三号卫星微波辐射率资料的质量控制  

A quality control procedure for FY-3 microwave radiance data

作　　者：王叶慧[1] 李刚[1] 何光鑫[1] 

机构地区：[1]南京信息工程大学,江苏南京210044

出　　处：《大气科学学报》2013年第5期560-567,共8页Transactions of Atmospheric Sciences

基　　金：公益性行业(气象)科研专项(GYHY200906006);国家重点基础研究发展计划(973计划)项目(2009CB421503);江苏省自然科学基金资助项目(SBK201341084);江苏省高校优势学科建设工程资助项目(PAPD)

摘　　要：利用双权重算法对观测增量(卫星观测亮度温度与用辐射传输模式模拟的背景场亮度温度之差)进行质量控制,模式背景场采用的是NCEP再分析资料,观测算子使用的是RTTOV(9.3v)(the fast radiative transfer for(A)TOVS model)。质量控制分两步进行:粗检验和离群值检验,目的是剔除受地表发射率或云影响的离群资料。结果表明:质量控制后观测增量标准差显著减小,偏差接近无偏正态分布,FY-3卫星微波温度探测器辐射率数据的质量得到很大的改善,为FY-3微波温度计观测亮温资料在数值预报资料同化系统中的应用奠定基础。Biweight estimation was used for observation incremental （ difference between observation and background simulated by RRTOV9 based on the NCEP Final Analysis data） during the quality control procedure. The quality control scheme was divided into two steps：A range check and identification of outliers. The purpose was to remove the outliers influenced by emissivity of surface and cloud. The pre- liminary analysis result showed that the deviation got close to unbiased normal distribution;the standard deviation of observation incremental significantly reduced after the quality control procedure. The quali- ty of FY-3 satellite microwave emissivity temperature detector data improved obviously, which laid a solid foundation for the application of MWTS bright temperature data in the numerical prediction data assimilation system.

关 键 词：微波温度计 质量控制 双权重算法 

分 类 号：P416[天文地球—大气科学及气象学]