This type of satellite imagery uses reflected sunlight (this is actually reflected solar radiation) to see things in the atmosphere and on the Earth's surface. Clouds and fresh snow are excellent reflectors, so they appear white on the imagery. Clouds can be distinguished from snow, because clouds move and snow does not move. Meanwhile, the ground reflects less sunlight, so it appears black on the imagery. The satellite uses its 0.55 to 0.75 micrometer (um) channel to detect this reflected sunlight. Since this imagery relies on reflected imagery, it cannot be used during night.
- Browse Related Terms: Air, Climate System, Conjugate Points, Downwelling Radiation, Equinox, Free Atmosphere, Ground Heat Flux, Latent Heat Flux, Lightning Discharge, Mesoclimate, Nacreous Clouds, Net All-Wave Radiation, Noctilucent Clouds, Radiational Cooling, Rain, Rotation, Sensible Heat Flux, Surface Energy Budget, Surface-based Convection, Visible Satellite Imagery