What is the difference between IR 3.9 µm and IR 10.7 µm satellite images?
Top of page These are two different wavelengths of infrared radiation. IR 3.9 µm images are useful for seeing fog at night, differentiating between different types of clouds, measuring the temperature of the surface of the sea, and many other uses. Some of the uses of IR 10.7 µm images include identifing severe weather as well as areas of heavy rainfall.
