Digital model of the METimage multispectral camera
Digital model of the METimage multispectral camera
METimage records 20 different spectral channels – the 'colours' of visible and non-visible light – in a wavelength range from 443 to 13,345 nanometres. By comparison, the human eye can perceive three spectral channels in the red, green and blue ranges with wavelengths between approximately 400 and 700 nanometres. The spectral channels for METimage are selected to distinguish features such as clouds from snow and ice, even though both initially appear white to the human eye. Other spectral channels can be used to determine the height of clouds, the surface temperature of oceans, whether something green is in fact vegetation, or whether an area is on fire.
