NOAA－AVHRR图像大气影响校正方法研究及软件研制第一部分　原理和模型

A Researth on the Method and Computer Program of Correction of Atmospheric Effects on NOAA-AVHRR Image Part One:Principle and Model

大气影响是遥感定量化应用的主要障碍之一。本文首先分析了大气对遥感图像产生的各种影响并对影响程度进行了一般的阐述，然后在原理和方法上对典型的大气影响校正算法进行了总结。通过分析我们认为，为了校正遥感图像所受到的大气影响，定量地获取当时当地的大气条件是完成这一工作的必要条件，而且是非常重要的条件之一。为此，我们提出了利用ＮＯＡＡ星载垂直探测器资料即ＴＯＶＳ资料，结合使用气溶胶模型，通过大气辐射传输模型，建立地面辐射量与卫星测量值之间的关系，并完成了对ＮＯＡＡ－ＡＶＨＲＲ图像的大气影响校正。在此基础上对我们的模型和算法进行了详细论述。这一模型是一套适用于发展业务软件的校正模型，软件发展完善后将为ＮＯＡＡ－ＡＶＨＲＲ数据的定量化应用打下基础。

Atmospheric effects is one of the main obstacle to the application of remote sensing.In this paper we have first analysed the various effects of atmosph-ere and illustrated its possible extent, then we have summerized, from principle and method,the classical algorithms published.From these analyses we think,to correct the effects of atmosphere,we must first acquire the condition of atmosphere quati-tatively,which is very important.For this reason,we will use NOAA on-board sounder system data named TOVS data,and aerosol model,by means of atmosphere transfer model,build up the relationship between the radiance of earth surface and the measured value of the satellite and finish the correction of atmospheric effects.In this paper,we will give the detail of ours algorithm,which is very suitable todevelope computer program used in conventional works.After finishing these work,we can correct atmosphere effects relatively easily.