The High Altitude Pseudo Satellites - HAPS - are platforms able to remain stable on a fixed point of the Earth for weeks or months, operating at a height of about 20 km. This allows to integrate and extend the capabilities of the satellites in the application domains already in the company's competence for the continuation of the other activities. Through the development of HAPS systems, it will therefore be possible to implement in the field of Earth Observation, Telecommunications and Navigation, the services currently managed through terrestrial structures such as towers and airplanes (with the possibility of integrating the latter with a greater number of activities and with greater reliability).

Since the 1990s, many international initiatives have focused on the study of the potential applications of the "High Altitude Pseudo Satellites", also called "High Altitude Platform Stations", HAPS, unmanned airplanes (airplanes, balloons) positioned at 20km altitude, in the stratosphere, capable of long-term flights (months, years). These features allow HAPS to have multiple technical advantages compared to terrestrial networks and satellite systems such as:

These advantages make it possible to extend the current capabilities of satellite systems to support multiple applications: telecommunications, earth observation, meteorology, astronomy, positioning, defence. Technological progress, especially in Europe, indicates in the five years 2018-2022 a time of possible operational start-up for services of this type.

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