本文主要对FY-2F和MTSAT-2静止气象卫星红外分裂窗的亮温资料和灰度数据进行了比较研究。对中国地区、不同经度带、江淮地区、北半球、南半球和全球区域的亮温和灰度的平均值、均方差进行了统计对比，结果发现： FY-2F红外扫描辐射器的IR1通道灰度平均值大于MTSAT-2，在标称图像中FY-2F的图像色调更浅，两卫星灰度平均值的差值随着区域越偏东越大；MTSAT-2灰度均方差大于FY-2F，也就是其图像显示的灰度尺度更宽，使得 MTSAT-2的图像更加清晰。 FY-2F红外扫描辐射器得到的亮温平均值大于MTSAT-2，且两卫星的亮温差会随着月份和经度的变化而变化，统计区域越向东差值越小，卫星的红外分裂窗通道差异对亮温的影响在2月为2.33K，在5月差异为0.74K，8月差别为1.12K，11月差值为1.86K；FY-2F的亮温均方差大于MTSAT-2的，也就是FY-2F的测量误差略大于MTSAT-2的测量误差，误差来源主要为红外扫描辐射器IR1通道本身的噪声。 亮温资料是由灰度索引值和定标数据对应得到的，将灰度均方差与亮温均方差比较，说明相同的亮温数据范围MTSAT-2对应的定标数据范围比FY-2F的更宽，亮温分辨率更高。

Brightness temperature and grayscale data of infrared split-window channel are used to compare from Fengyun-2F and Multi-functional Transport Satellite-2 geostationary satellite. Statistical comparison with the mean and mean square error of brightness temperature and grayscale data is carried on for China region, longitude zones, jianghuai, northern, southern and the global. From this work, it can be found that: the average grayscale of FY-2F is bigger than the average of MTSAT-2, which indicates color of FY-2F nominal image is shallower, and the average difference as the east the area, the larger. The mean square error of grayscale of MTSAT-2 is greater than FY-2F, which shows the gray scale of images from MTSAT-2 is more wide, causing the nominal images from the MTSAT-2 are clearer. The average brightness temperature of FY-2F is greater than the average of MTSAT-2, and the difference between two satellites will vary with the month and longitude. The difference as the east the statistical area, the smaller. The difference between two infrared split window in February is 2.33K, in May is 0.74 K, in August is 1.12 K, and the difference in November is 1.86 K. The mean square error of brightness temperature from FY-2F is greater than the mean square error form MTSAT-2, namely the measuring error of FY-2F is slightly bigger than that of MTSAT-2, and the main error causing from VISSR. The brightness temperature data is obtained by calibration data and grayscale; mean square error of brightness temperature and grayscale data shows that with the same range of brightness temperature the corresponding calibration data range of MTSAT - 2 is bigger, and brightness temperature has higher resolution.