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Europe: Infrared satellite animation

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Infrared satellite image
© Copyright EUMETSAT/Met Office

These images come from satellites which remain above a fixed point on the Earth (i.e. they are “geostationary”). The infrared image shows the invisible infrared radiation emitted directly by cloud tops and land or ocean surfaces. The warmer an object is, the more intensely it emits radiation, thus allowing us to determine its temperature. These intensities can be converted into greyscale tones, with cooler temperatures showing as lighter tones and warmer as darker.

Lighter areas of cloud show where the cloud tops are cooler and therefore where weather features like fronts and shower clouds are. The advantage of infrared images is that they can be recorded 24 hours a day. However, low cloud, having similar temperatures to the underlying surface, are less easily discernable. Coast-lines and lines of latitude and longitude have been added to the images and they have been altered to northern polar stereographic projection.

The infrared images are updated every hour. It usually takes about 20 minutes for these images to be processed and be updated on the web site. The time shown on the image is in UTC.

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