Reflectance from MODIS solar reflective channels in 1 km resolution, is employed to derive smoke pixels. The 0.41 μm and 0.94 μm channels, denoted by R8 and R19, respectively, are used to reject vegetation pixels. The 2.13 μm and 0.44 μm channels, denoted by R7 and R9, respectively, are applied to reject bare soil pixels. The reflectance from the blue channel is denoted by R3, along with R8 to reject water pixels.