HAPS-High-altitude platform station

This a kind of low altitude satellite:

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.”

High-altitude platform station (short: HAPS) is – according to Article 1.66A of the International Telecommunication Union´s (ITU) ITU Radio Regulations (RR)[2] – defined as “a station on an object at an altitude of 20 to 50 km and at a specified, nominal, fixed point relative to the Earth”.

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