基于MODIS影像下的温度反演研究

The Research on Temperature Inversion Based on MODIS Images

利用遥感影像获取地表温度信息，对于检测地表状况和生态环境变化有重要意义。在对地观测卫星MODIS的16个热红外波段中，其中有6个波段是针对地表温度来设计的，其中第31（10.78-11.28um）和32（11.77-12.27um）与TM的第6波段区间基本相同。运用单窗算法分别对这2个波段建立方程，然后通过对Planck方程的辐射率和温度计算模拟，发现温度和辐射率近似线性相关，本文通过对MODIS遥感影像进行数据读取、辐射定标、反演温度、区域裁剪预处理，得到了研究区地表温度的空间分布变化，最后运用单窗算法对31通道的影像反演了研究区的温度分布。

Land surface temperature information can be retrieved from Remote Sensing image, which is important and significant to observe macroscopically the earth＆#39;s surface status and ecological and environmental change. In the 16 thermal infrared band of MODIS-Earth Observation satellites, of which there are six bands designed for surface temperature, and the interval of 31st （10.78-11.28um） and 32nd （11.77-12.27um） are basically the same with sixth band of TM. Single-window algorithm are used respectively to establish equations for these two bands, and then through the computational simulation of emissivity and temperature of Planck equation, it is concluded that the temperature and emissivity are approximately linear related. Through reading data, radiance calibration, temperature inversion, regional crop pretreatment of the MODIS remote sensing image, the distribution of surface temperature changes has been concluded. Finally window algorithm is used for the image of single 31-channel, and inverse temperature distribution in the study area.