从118.75 GHz附近六通道亮温反演大气温度廓线的数值模拟研究

Numerical Simulation of Temperature Profile Retrievals from the Brightness Temperatures in 6 Channels near 118.75 GHz

为了能在静止气象卫星上实现微波被动遥感探测大气温度廓线 ,并保持一定的地面空间分辨率 (如视场小于 60km) ,就需要使用高频微波及大天线。欧洲和美国下一代静止气象卫星上都已考虑采用 1 1 8 75GHz附近通道。为了充分了解 1 1 8 75GHz附近通道遥感反演温度廓线的能力 ,为仪器研制及今后资料的解释反演提供必要的基础数据 ,作者开展了采用 1 1 8 75GHz附近六个通道遥感反演大气温度廓线的数值模拟研究。统计反演的数值试验表明 ,1 1 8 75GHz附近六通道对温度垂直分布有一定的遥感反演能力 ;

High microwave frequencies near O 2 emission lines and/or large antenna have to be used for monitoring the atmospheric temperature profiles with an acceptable ground resolution from passive microwave radiometry on the geostationary satellite The use of the 118 75 GHz O 2 resonance has already been considered for the microwave payloads onboard the European and American next-generation geostationary satellites In order to demonstrate the 118 75 GHz capability of retrieving temperature profiles, a numerical simulation study has been conducted with 6 channels near 118 75 GHz It is shown from numerical experiments with statistical retrieval method that microwave sounder using the 118 75 GHz O 2 line can provide the useful information on temperature profiles; better retrievals of temperature are given at the levels where are located the peaks of the weighting functions