Weather satellites take some stunning pictures I can’t deny but, there is so much more to them than that. Most carry sensors which record not just the visible but a spread of wavelength across the radiation spectrum.

The images below demonstrate this. The first image is a false-colour image combining the visible channels and infrared data. Land, sea and cloud patterns easily visible.

The second image below is the same scene but using a combination of two of the IR channels which cut through the big cloud masses but clearly show the aircraft con-trails criss-crossing the south of Britain and France. Amazing!