Detection

__Section 3__

The US department of defence, have airburst detectors that are carried on board Sentinel satellites operating at 38,000km altitude in geosynchronous orbit. Their prime mission is to look down on earth to detect heat, from rocket engines.

The main senors detect infared radaition but have campaninon visible light detectors. The infared sensors scan the Earth's disc every 10 seconds at a wavelength of 2.78 microns.



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