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Concept
Kuiper Airborne Observatory
Summary
The Gerard P. Kuiper Airborne Observatory (KAO) was a national facility operated by NASA to support research in infrared astronomy. The observation platform was a highly modified Lockheed C-141A Starlifter jet transport aircraft (s/n: 6110, registration: N714NA, callsign: NASA 714) with a range of 6,000 nautical miles (11,000 km), capable of conducting research operations at altitudes of up to 48,000 feet (14 km).
The KAO was based at the Ames Research Center, NAS Moffett Field, near Sunnyvale, California. Prior to its conversion to the airborne observatory, it had served as Lockheed's demonstrator for a potential civilian version of the C-141.
Though it began operation in 1974 as a replacement for an earlier aircraft, the Galileo Observatory (itself a converted Convair 990 (N711NA) that was destroyed in a collision with a U.S. Navy Lockheed P-3C Orion patrol aircraft in 1973), the KAO wasn't dedicated until May 21, 1975. The KAO flew at altitudes of 41,000 to 45,000 feet, and flew a total of 1,417 times.
The KAO has a 160-foot wingspan, measures 145 feet long, and stands 39 feet high. A typical crew consisted of two pilots, a flight engineer, the mission staff, and the flight team, and the aircraft provided a stable platform for missions lasting up to seven and a half hours. The KAO flew mostly out of Moffett Field, but also flew out of New Zealand, Australia, American Samoa, Panama, Japan, Guam, Brazil, Ecuador, Chile, Houston (Texas), and Hawaii.
During a flight in 1978 that took off from American Samoa, two of the observatory's four engines failed soon after takeoff, and after the aircraft staggered and instrument power was shut down, the flight engineer had to crank down the landing gear manually.
The KAO's telescope was a conventional Cassegrain reflector with a 36-inch (91.5 cm) aperture, designed primarily for observations in the 1 to 500 μm spectral range. Its flight capability allowed it to rise above almost all of the water vapor in the Earth's atmosphere (allowing observations of infrared radiation, which is blocked before reaching ground-based facilities), as well as travel to almost any point on the Earth's surface for an observation.
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