The focus of this discussion is the detection of fog using GOES 10 imagery. Figure 1 is the fog product.
Liquid clouds appear in lighter shades, while ice clouds and snow appear dark.
A low pressure system in KS has a combination of light and dark pixels due to the presence of both ice and liquid phase clouds contained within the storm. Click on images to enlarge Figure 2 Figure 3 Figure 2 shows the 4 km resolution 3.9 micron channel, and although the fog and ice clouds are still discernible, it does not do as well as the fog product in contrasting between the low clouds and ground. Figure 3 shows the 4-km resolution 10.7 micron channel image. Note that the fog and ground have similar temperatures at 10.7 microns making it difficult to discern the ground from the fog and low stratus. Figure 4 xxxx Figure 4 is the 1 km resolution visible image.