Project leader Dr Roland Leigh, of the Earth Observation Science group, explains to ITV News Central reporter Chris Halpin how the specially adapted Spectrometer mapped air quality around Leicester.
The device gave a reading for Nitrogen Dioxide (NO2) levels between the ground and the plane - which was flying at around 900m.
Each reading corresponds to an area of 6 metres by 100 metres at ground level.
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Cold and frosty initially. Dry and fine conditions through the day.
Some fog patches slow to clear on Monday. Otherwise a generally bright day.
Rescue teams arrived at the scene to find the two men standing on top of their car roof.