The blue band is mapped to a mixture of Band 1, and Band 2 minus Band 4. The green band is mapped to an inverted Band 4. This color scheme results in upper level clouds appearing bluish, lower level clouds appearing greenish, and land appearing as various shades of red depending on its temperature. The third image is produced from Band 1 data. Since Band 1 is a measure of albedo, this image allows cloud, land, and water to be distinguished on the basis of their reflectance.
Clouds are evident as light areas due to their high albedo.
Land and water appear as darker areas owing to their lower albedo. At night this image is dark and shows nothing because there is no reflected sunlight to be detected. The fourth image is similar to the RGB image. The main difference being that the green band is mapped to Band 2 minus Band 4 at a constant scale. The fifth image is a hotspot image created by subtracting Band 4 from Band 2.