The sounding data of meteorological satellites provide not only the real time weather information about the distribution of both cloud and rainfall,but also some others about the movement and state of atmosphere.They ...The sounding data of meteorological satellites provide not only the real time weather information about the distribution of both cloud and rainfall,but also some others about the movement and state of atmosphere.They are important variables and parameters for NWP model used to simulate and predict atmospheric state.In order to introduce remote sensing information from satellites into NWP model,there is an efficient way of establishing an RT model by use of the atmosphere radiation sounding data of meteorological satellites to get the variables and parameters valuable to NWP model.In this paper,we set up profiles of air temperature and water vapor from the surface to upper (0.1 hPa) using the radiosounding data and the surface data from May to August 1998 atmosphere East Asia.A TOVS RT model (RTTOV5) is provided to compute the value of radiation value of HIRS channels in NOAA14.Then the radiation values of 19 HIRS channels are gotten.After matching these data computed by the RT model and the corresponding values coming from satellite sounding in time,the statistic distribution of bias between tile model output and the satellite sounding at each sounding channel can be gotten.At the same time.the distribution of RMS to every TOVS HIRS channel,the standard biases to different scanning angle to each channel are also obtained.展开更多
RTTOV(Radiative Transfer for TOVS)是近期出现的一个比较优秀的快速辐射传输模式。该研究介绍了RTTOV工作的原理和方法,从提高数值预报模式准确度和模拟卫星辐射亮温2个方面出发,综述了RTTOV模式的应用研究进展。结果显示,利用RTTOV...RTTOV(Radiative Transfer for TOVS)是近期出现的一个比较优秀的快速辐射传输模式。该研究介绍了RTTOV工作的原理和方法,从提高数值预报模式准确度和模拟卫星辐射亮温2个方面出发,综述了RTTOV模式的应用研究进展。结果显示,利用RTTOV将卫星资料直接同化到数值预报模式中,能显著提高数值预报的准确度;同时,RTTOV能够较好地模拟晴空条件下卫星接收到的辐射亮温,有云条件下的模拟值与实测值之间的误差大于晴空条件。利用RTTOV模拟得到的亮温进行仿云图制作,在一定程度上可以判断云体和云系的移动及发展变化,进而改善气象预报和保障业务。展开更多
基金This paper is supported by the National Key Project of Basic Theory Research"the Formation Mechanism and Prediction Theory of Severe Climatic and Synoptic Disasters in China" under Grant 199804096.
文摘The sounding data of meteorological satellites provide not only the real time weather information about the distribution of both cloud and rainfall,but also some others about the movement and state of atmosphere.They are important variables and parameters for NWP model used to simulate and predict atmospheric state.In order to introduce remote sensing information from satellites into NWP model,there is an efficient way of establishing an RT model by use of the atmosphere radiation sounding data of meteorological satellites to get the variables and parameters valuable to NWP model.In this paper,we set up profiles of air temperature and water vapor from the surface to upper (0.1 hPa) using the radiosounding data and the surface data from May to August 1998 atmosphere East Asia.A TOVS RT model (RTTOV5) is provided to compute the value of radiation value of HIRS channels in NOAA14.Then the radiation values of 19 HIRS channels are gotten.After matching these data computed by the RT model and the corresponding values coming from satellite sounding in time,the statistic distribution of bias between tile model output and the satellite sounding at each sounding channel can be gotten.At the same time.the distribution of RMS to every TOVS HIRS channel,the standard biases to different scanning angle to each channel are also obtained.
文摘RTTOV(Radiative Transfer for TOVS)是近期出现的一个比较优秀的快速辐射传输模式。该研究介绍了RTTOV工作的原理和方法,从提高数值预报模式准确度和模拟卫星辐射亮温2个方面出发,综述了RTTOV模式的应用研究进展。结果显示,利用RTTOV将卫星资料直接同化到数值预报模式中,能显著提高数值预报的准确度;同时,RTTOV能够较好地模拟晴空条件下卫星接收到的辐射亮温,有云条件下的模拟值与实测值之间的误差大于晴空条件。利用RTTOV模拟得到的亮温进行仿云图制作,在一定程度上可以判断云体和云系的移动及发展变化,进而改善气象预报和保障业务。
