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A high altitude platform can provide observation or communication services. A high-altitude platform station (HAPS, which can also mean high-altitude pseudo-satellite or high-altitude platform systems), also known as atmospheric satellite, is a long endurance, high altitude aircraft able to offer observation or communication services similarly to artificial satellites.
The Boeing Phantom Eye is a high altitude, long endurance (HALE) liquid hydrogen-powered [1] unmanned aerial vehicle developed by Boeing Phantom Works. [2] The aircraft was Boeing's proposal to meet the demand from the US military for unmanned drones designed to provide advanced intelligence and reconnaissance work, driven by the combat conditions in Afghanistan in particular. [3]
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The Boeing SolarEagle (Vulture II) was a proposed High-Altitude Long Endurance (HALE) unmanned aerial vehicle solar-electric spy plane developed by Boeing Phantom Works. [1] The proposed aircraft had a wingspan of 393.7 feet (120.0 meters), and was intended to remain airborne for up to five years at a time without needing to land. [2]
The official Air Force statement is that the project is "an experimental test program to demonstrate technologies for a reliable, reusable, uncrewed space test platform for the U.S. Air Force". [26] The primary objectives of the X-37B are twofold: reusable spacecraft technology and operating experiments which can be returned to Earth. [ 26 ]
Design, build, and demonstrate the Global Observer UAS for a 5 - 7 day endurance for 55,000 to 65,000 feet (17,000 to 20,000 m) altitude missions with 380-pound, 2.8 kW payload capacity. The system had to be capable of being transported by a C-130 aircraft.
The Scaled Composites Model 281 Proteus is a tandem-wing high-altitude long-endurance aircraft designed by Burt Rutan to investigate the use of aircraft as high-altitude telecommunications relays. The Proteus is a multi-mission vehicle able to carry various payloads on a ventral pylon. The Proteus has an extremely efficient design and can orbit ...
QinetiQ Zephyr, high-altitude long-endurance (in development) RAE LARYNX (1927–1929) - guided anti-ship weapon; R.F.C. 1917 Aerial Target The first drone aircraft; Short Skyspy - ducted fan for urban reconnaissance [285] Singular Aircraft SA03 (UK/Spain) Thales Watchkeeper WK450, reconnaissance (2005) UB.109T (1950s) - project for long range ...