High-altitude Platform
A high-altitude platform (HAP) is a quasi-stationary aircraft that provides means of delivering a service to a large area while staying thousands of feet above in the air for long periods of time. A HAP differs from other aircraft in the sense that it is specially designed to operate at a very high altitude (17–22 km) and is able to stay there for hours, even days. The new generation of HAPs, however, will expand this period to several years.
Read more about High-altitude Platform: Limitation Due To Power, Altitude Selection For HAPs, Comparison To Satellites, Applications, See Also
Famous quotes containing the word platform:
“I marched in with the men afoot; a gallant show they made as they marched up High Street to the depot. Lucy and Mother Webb remained several hours until we left. I saw them watching me as I stood on the platform at the rear of the last car as long as they could see me. Their eyes swam. I kept my emotion under control enough not to melt into tears.”
—Rutherford Birchard Hayes (1822–1893)