Colour Interpretation Guide


open water

date
Meteosat Second Generation

length
HRV Fog RGB - Recipe

author
Red: NIR1.6
Green: HRV
Blue: HRV

Sea, lakes and rivers (not covered by ice)

Sea, lakes, rivers (open water surfaces) appear black in the HRV Fog RGB images. See for example the Adriatic Sea, Mediterranean Sea, Baltic Sea, North Sea and several lakes in the images left and below.

water surfaces
Meteosat, SEVIRI HRV Fog RGB for 17 March 2014, 10:25 UTC

water surfaces
Meteosat, SEVIRI HRV Fog RGB for 13 March 2014, 11:40 UTC

Explanation of the colours of the open water surfaces (see also the recipe on the left side):

The reflectivity is very low in both the NIR1.6 and the HRV channel. After performing the linear stretching the signals are still very low.