# 543b

543b, also known as *False color infrared*, is a basic infrared enhancement for night time use.

On METEOR-M, the enhancement is called 654 due to the different channel numbering.

### Appearance

Land appears in various shades of bluish-gray, where darker colors indicate lower surface temperature.
Clouds appear white, and progressively more yellow tinged as thickness decreases.
Fog appears pale yellow, but can be hard to distinguish.
Sea appears almost black, with colder waters being progressively more gray.

### Intended usage

General purpose imagery at night.
Sea water currents detection.

### Limitations

Hard to determine the cloud nature.
Low contrast.