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Image was updated
21.12.2024
at
23:43
(
21.12.2024 19:43 UTC
) by satellite NOAA 18.
Enhancement type - HVCT-precip
Description of enhancement HVCT-precip:
Creates a false colour image from NOAA APT images based on temperature using the HVC colour model. Uses the temperature derived from the sensor 4 image to select the hue and the brightness from the visible (sensor 2) image (or the sensor 4 image if the
Use other sensor
option is selected) to select the value and chroma. The HVC colour model attempts to ensure that different colours at the same value will appear to the eye to be the same brightness and the spacing between colours representing each degree will appear to the eye to be similar. Bright areas are completely unsaturated in this model. NOAA colour IR contrast enhancement option. Greatly increases contrast in the darker land/sea regions and colours the cold cloud tops. Allows fine detail in land and sea to be seen and provides a very readable indication of cloud top temperatures. This enhancement option is temperature normalised.
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