The KAO started as a replacement following the loss of NASA's previous airborne observatory, the Galileo Observatory, in an air to air collision.
The KAO was converted from a Lockheed demonstrator C-141 (in Lockheed's attempt to market the C-141 for civilian operations) and was fitted with a 91.5cm aperture telescope, the capability of the KAO over the Galileo Observatory included being able to fly above most of the earth's water vapour, thus being able to observe infared radiation which is usually blocked to ground based observatories.
Stats:
Max altitude: 48,000 ft
Range: 6,000 nm




