A Sun-synchronous orbit (SSO), also called a heliosynchronous orbit, is a nearly polar orbit around a planet, in which the satellite passes over any given point of the planet's surface at the same local mean solar time. More technically, it is an orbit arranged so that, for each revolution of the planet around the Sun, its orbital plane (specifically the longitude of the ascending node) precesses through one complete revolution around the planet.
A Sun-synchronous orbit (SSO), also called a heliosynchronous orbit, is a nearly polar orbit around a planet, in which the satellite passes over any given point of the planet's surface at the same local mean solar time. More technically, it is an orbit arranged so that, for each revolution of the planet around the Sun, its orbital plane (specifically the longitude of the ascending node) precesses through one complete revolution around the planet.
Source: Wikipedia "Sun-synchronous orbit" · CC BY-SA 4.0
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