Orbit Helium

Orbit Helium - Synchronous - the helium-synchronous orbit is a particular case of a nearly polar orbit. The satellite travels from the North Pole to the south pole and vice versa, but their plan orbit is always fixed to an observer who is facing Sun Once the satellite passes always approximately the same point on the surface of the Earth every day at the same time. Thus the satellite can transmit all data obtained for an antenna fixed terrestrial during their orbits. Usually the satellites helium-synchronous satellites are of medium and low orbit, with altitudes ranging from 550 to 850 km. Orbitam with an inclination to the equator of 97 to 98 º. As the Earth moves around the sun, to keep your plan in orbit, the satellites of helium-synchronous orbit must make a rotation about 1 ° to the east every day.