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sexta-feira, 9 de novembro de 2007

Polar Orbit

Polar Orbit - a satellite into polar orbit passes over (or almost over) both poles of the planet (or other celestial body) in each of its revolutions. Thus, the orbit inclination is equal or near to 90 degrees at the equator. As the satellite is fixed orbital plane and perpendicular to the rotation of the planet, it will pass on a region with a different longitude each of its orbits. The polar orbits are generally used for satellites, geographical maps, observation or recognition, including spy satellites, as well as some weather satellites. To stay on a polar area, for a long time, despite the distance, is used an elliptic orbit with great eccentricity and with peak on this area, known as the orbit of Molniya.

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