Acquired Reactive Perforating Dermatosis Last updated July 12, 2017 Reactive Perforating Collagenosis (RPC) is a very rare skin disorder that can manifest during early childhood or adulthood.
Fog is a mixture because it is an aerosol of water droplets or ice crystals in air. Fog can also contain molecules of acids or ammonia. Continue Reading
For the emitted radiation, the fog product is the primary tool for fog detection during night time. The fog product is found by subtracting the brightness temperatures at 3.9 microns from those at 10.7 microns. Large differences signify the presence of fog or opaque low to mid-level clouds. With a threshold between 1 and 2 K, the fog product can catch most of the nighttime fog, as indicated in Figure 4.