Sun-Synchronous Satellite is one of the satellites that moving around the earth and always gets its power source from the sun. It also called a geo-centric which includes altitude and inclination measurement. Due to the satellite is always keeps moving on, so in 24 hours the satellite will pass few countries at the same local solar system (to get solar power from the sun). And this is of course the complete one year of the satellite oscillation, is the direct correlation with actual solar time.For a geo-stationary satellite, we all know that the purposes are for communication, coordination, TV broadcasting and earth observation. In sun-synchronous satellite case the purpose are mostly for the military and remote sensing. This kind of satellite we can use it for spying other countries.
