风云三号MWTS/MWHS大气温度与水汽廓线反演——2008年凤凰台风个例试验  

Retrievals of atmospheric temperature and humidity profiles from Chinese microwave FY-3A measurements and the example of Phoenix Typhoon,2008

作　　者：陈昊[1] 金亚秋[1] 

机构地区：[1]复旦大学波散射与遥感信息教育部重点实验室

出　　处：《遥感学报》2011年第1期137-147,共11页NATIONAL REMOTE SENSING BULLETIN

基　　金：国家自然科学基金项目(编号:60971091;40637033);遥感科学国家重点实验室(编号:2009KFJJ011)

摘　　要：本文结合中国国家标准大气(GB 1920-80)与1976年美国标准大气,利用MPM(Millimeter PropagationModel,毫米波传播模型)、ROS(Rosenkranz)模型和本文提出的改进混合模型(MIX,Mixed)计算大气吸收系数。采用西北太平洋地区中国与日本16个无线电高空探测仪836组大气实测数据(海拔高度、气压、大气温度和湿度),通过大气辐射传输模型,按MWTS/MWHS的工作参数(中心频率、带宽和波段数目),模拟大气辐射亮度温度,用以验证FY-3A的MWTS/MWHS实测辐射亮度温度。比较了MPM、ROS与MIX 3种模型的模拟结果,并用MIX模型分析了MWTS/MWHS多通道大气吸收权重函数。进而通过无线电高空探测仪的大气实测数据与MWTS/MWHS的实测多通道辐射亮温数据,构成统计D矩阵,并由此反演2008年7月27日"凤凰"台风西北太平洋地区大气温度和湿度的3维分布。As a China＇s second generation of polar-orbitting meteorological satellites,FY-3A（Fen Yun means wind and cloud） was launched on May 27,2008.The microwave temperature sounder（MWTS） and microwave humidity sounder（MWHS） are first aboard the Chinese FY satellite for the purpose of retrieving atmospheric temperature and humidity profiles.There are four channels of MWTS,i.e.50.30,53.596±0.115,54.94 and 57.29 GHz, with corresponding bandwidths 180,340,400 and 330 MHz,respectively,and five channels of MWHS,i.e.dual polarized（V,H） 150,183.31±1.0,183.31±3.0 and 183.31±7.0 GHz,which are corresponding to the bandwidths 1000,500,1000 and 2000 MHz,respectively.The spatial resolutions of MWTS and MWHS at sub-point are 50/75 km and 15 km,respectively,and the fields of views are 15 and 98 lines,respectively.Both scan modes are cross-track scanning. Based on the algorithms of atmospheric absorption coefficients,i.e.the MPM（Millimeter Propagation Model） and ROS（Rosenkranz＇s model）,this paper presents a novel MIX（mixed） model for calculation of atmospheric absorption coefficients in the multiple channels of MWTS and MWHS under China National Standard Atmosphere （GB 1920-80） and U.S.Standard Atmosphere,1976. Using atmospheric radiative transfer with the in situ measurements of 836 radiosonde datasets（including the altitude,pressure,atmospheric temperature and humidity） from 16 sites in China and Japan,multiple channel brightness temperature（T_b） are simulated,and compared with FY-3A MWTS/MWHS observations as good validation.The radiosonde measurements were issued by NOAA/ESRL（National Oceanic and Atmospheric Administration/Earth System Research Laboratory）.The simulations with the atmospheric absorption coefficients based on respective MPM,ROS and our MIX algorithms are also analyzed.Data validation shows good performance of the MIX model. The statistical D-matrix is firstly constructed from the MWTS/MWHS T_b data and the corresponding radiosonde measurements,and then is applied to

关 键 词：FY-3A MWTS/MWHS 大气吸收系数 辐射传输 D矩阵 大气温度和湿度廓线 

分 类 号：P405[天文地球—大气科学及气象学]