difference between geostationary satellite and polar satellite on the basis of Orbital motion and distance from earth and its uses
Answers
Geostationary Satellite orbit the Earth at 0 degree to the equator at a radius of about 42,000 Km at a height of 36,000 km above the earth surface. ... A polar satellite passes over the poles (both north and south), at any altitude in space, which means it does not appear to be stationary over any point
Geo- satellite are maintained on the allocated longitude and the equatorial plane at the height of 36000 km with minimum eccentricity and inclination
where as polar satellite are place over the poles
Generally the Geo-sat are used for communications purposes like voice,data and video .some of the satellites have very high resolution radio meters payloads for weather forecasting.
polar- sats are placed at lower earth orbit around few hundred to few thousand km are used for remote sensing purposes.These sats have a definite swath width of path to cover the surface of the earth like push broom ground track. These sats orbits are so maintained it revisits same local time on specific location with sun illumination (sun synchronous).that is the regression of the orbit shifted about 0.9 degree every day longitudinally to follow sun.
in other words 360 degrees in 365 days.
Polar goes over the poles - as the world turns, they travel over different locations... mainly used for earth mapping and spy satellites. Geo-stationary is equatorial - they stay over the same location (they're in what has been called a Clarke Orbit, after Arthur C Clarke who popularized the concept). Most geosynchronous satellites are used for communications. Satellites in geostationary equatorial orbit (GEO) orbit Earth around the equator at a very specific altitude that allows them to complete one orbit in the same amount of time that it takes Earth to rotate once. As a result, these satellites stay above one point on Earth’s equator at all times.Direct-broadcast television satellites,earth-surveillance missions, including military surveillance and weather tracking missions use GEO.
Satellites in polar orbits orbit around Earth at right angles to the equator over both the North and South poles. Polar orbits can occur at any altitude,and are used by National Oceanic and Atmospheric Administration,which provide weather information for all areas of the world every six hours. The satellites also map ozone levels in the atmosphere, including the level over the poles.
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