3.9 µm Imagery

1. Nighttime
   1. Similarities to 10.7 µm
   2. Differences to 10.7 µm
      1. Noise
      2. Emissivity
      
      
2. Daytime
   1. Similarities to 10.7 µm
   2. Differences to 10.7 µm
      1. Reflection off liquid water cloud
      
      
3. Temperature Responsivity
   1. Fires
   2. Thin cirrus
   
   
4. Fog and Reflectivity Products