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A satellite nation is a nation that appears to be sovereign, but is actually under the control of another nation. Examples would be nations such as Hungary and Poland under the USSR.
In the context of spaceflight, a satellite is an artificial object which has been intentionally placed into orbit. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as Earth's Moon. Sun-synchronous orbit: An orbit which combines altitude and inclination in such a way that the satellite passes over any given point of the planets' surface at the same local solar time. 2  Such an orbit can place a satellite in constant sunlight and is useful for imaging, spy, and weather satellites.